Agilent Technologies Power Supply 66312A User Manual

Programming Guide  
Dynamic Measurement DC Source  
Agilent Models 66312A, 66332A  
System DC Power Supply  
Agilent Models 6631B, 6632B, 6633B, 6634B  
6611C, 6612C, 6613C, 6614C  
Agilent Part No. 5962-8198  
Microfiche No 5962-8199  
Printed in U.S.A.  
January, 2000  
 
Table of Contents  
Safety Guidelines  
Printing History  
2
2
3
Table of Contents  
1 - GENERAL INFORMATION  
About this Guide  
Documentation Summary  
External References  
7
7
7
8
8
8
GPIB References  
SCPI References  
2 - INTRODUCTION TO PROGRAMMING  
VXIplug&play Power Products Instrument Drivers  
Supported Applications  
9
9
9
System Requirements  
9
Downloading and Installing the Driver  
Accessing Online Help  
GPIB Capabilities of the DC Source  
GPIB Address  
RS-232 Capabilities of the DC Source  
RS-232 Data Format  
9
10  
10  
10  
10  
10  
11  
11  
12  
12  
12  
13  
13  
14  
14  
14  
14  
15  
15  
15  
15  
15  
15  
16  
16  
16  
16  
17  
17  
RS-232 Flow Control  
RS-232 Programming Example  
RS-232 Troubleshooting  
Introduction to SCPI  
Conventions Used in This Guide  
Types of SCPI Commands  
Multiple Commands in a Message  
Moving Among Subsystems  
Including Common Commands  
Using Queries  
Types of SCPI Messages  
The Message Unit  
Headers  
Query Indicator  
Message Unit Separator  
Root Specifier  
Message Terminator  
SCPI Data Formats  
Numerical Data Formats  
Suffixes and Multipliers  
Response Data Types  
SCPI Command Completion  
Using Device Clear  
3 - PROGRAMMING THE DC SOURCE  
Introduction  
Programming the Output  
Power-on Initialization  
19  
19  
19  
19  
19  
20  
20  
21  
21  
Enabling the Output  
Output Voltage  
Output Current  
Triggering Output Changes  
SCPI Triggering Nomenclature  
3
 
Output Trigger System Model  
21  
21  
22  
22  
23  
23  
25  
25  
25  
25  
26  
26  
28  
28  
28  
29  
29  
29  
30  
30  
32  
32  
33  
34  
34  
34  
35  
35  
36  
36  
36  
36  
37  
37  
Setting the Voltage or Current Trigger Levels  
Initiating the Output Trigger System  
Generating Triggers  
Making Measurements  
Voltage and Current Measurements  
Internally Triggered Measurements  
SCPI Triggering Nomenclature  
Measurement Trigger System Model  
Initiating the Measurement Trigger System (Agilent 66312A, 66332A Only)  
Selecting the Measurement Trigger Source (Agilent 66312A, 66332A Only)  
Generating Measurement Triggers (Agilent 66312A, 66332A Only)  
Measuring Output Pulses (Agilent 66312A, 66332A Only)  
Current Detector  
Pulse Measurement Queries  
Controlling Measurement Samples  
Varying the Voltage or Current Sampling Rate  
Multiple Measurements (Agilent 66312A, 66332A Only)  
Pre-event and Post-event Triggering (Agilent 66312A, 66332A Only)  
Pulse Measurement Example (Agilent 66312A, 66332A only)  
Programming the Status Registers  
Power-On Conditions  
Operation Status Group  
Questionable Status Group  
Standard Event Status Group  
Status Byte Register  
Determining the Cause of a Service Interrupt  
Servicing Operation Status and Questionable Status Events  
Monitoring Both Phases of a Status Transition  
Inhibit/Fault Indicator  
Remote Inhibit (RI)  
Discrete Fault Indicator (DFI)  
Using the Inhibit/Fault Port as a Digital I/O  
DFI Programming Example  
4 - LANGUAGE DICTIONARY  
Introduction  
39  
39  
39  
43  
43  
44  
44  
44  
44  
44  
45  
45  
45  
45  
46  
46  
46  
47  
47  
47  
Subsystem Commands  
Common Commands  
Programming Parameters  
Calibration Commands  
CALibrate:CURRent  
CALibrate:CURRent:NEGative  
CALibrate:CURRent:MEASure:LOWRange  
CALibrate:CURRent:MEASure:AC  
CALibrate:DATA  
CALibrate:LEVel  
CALibrate:PASSword  
CALibrate:SAVE  
CALibrate:STATe  
CALibrate:VOLTage  
CALibrate:VOLTage:PROTection  
Measurement Commands  
MEASure:ARRay:CURRent? FETCh:ARRay:CURRent?  
MEASure:ARRay:VOLTage? FETCh:ARRay:VOLTage?  
4
 
MEASure:CURRent? FETCh:CURRent?  
MEASure:CURRent:ACDC? FETCh:CURRent:ACDC?  
MEASure:CURRent:HIGH? FETCh:CURRent:HIGH?  
MEASure:CURRent:LOW? FETCh:CURRent:LOW?  
MEASure:CURRent:MAXimum? FETCh:CURRent: MAXimum?  
MEASure:CURRent:MINimum? FETCh:CURRent:MINimum?  
MEASure:VOLTage? FETCh:VOLTage?  
MEASure:VOLTage:ACDC? FETCh:VOLTage:ACDC?  
MEASure:VOLTage:HIGH? FETCh:VOLTage:HIGH?  
MEASure:VOLTage:LOW? FETCh:VOLTage:LOW?  
MEASure:VOLTage:MAXimum? FETCh:VOLTage:MAXimum?  
MEASure:VOLTage:MINimum? FETCh:VOLTage:MINimum?  
SENSe:CURRent:RANGe  
48  
48  
48  
49  
49  
49  
50  
50  
50  
51  
51  
51  
52  
52  
53  
53  
53  
53  
54  
55  
55  
55  
55  
56  
56  
56  
57  
57  
57  
58  
58  
58  
59  
59  
60  
60  
60  
61  
61  
61  
61  
62  
62  
63  
63  
63  
64  
64  
65  
65  
65  
66  
66  
67  
67  
SENSe:CURRent:DETector  
SENSe:FUNCtion  
SENSe:SWEep:OFFSet:POINts  
SENSe:SWEep:POINts  
SENSe:SWEep:TINTerval  
SENSe:WINDow  
Output Commands  
OUTPut  
OUTPut:DFI  
OUTPut:DFI:SOURce  
OUTPut:PON:STATe  
OUTPut:PROTection:CLEar  
OUTPut:PROTection:DELay  
OUTPut:RELay  
OUTPut:RELay:POLarity  
OUTPut:RI:MODE  
[SOURce:]CURRent  
[SOURce:]CURRent:TRIGger  
[SOURce:]CURRent:PROTection:STATe  
[SOURce:]DIGital:DATA  
[SOURce:]DIGital:FUNCtion  
[SOURce:]VOLTage:ALC:BANDwidth? [SOURce:]VOLTage:ALC:BWIDth?  
[SOURce:]VOLTage:TRIGger  
[SOURce:]VOLTage:PROTection  
Status Commands  
STATus:PRESet  
STATus:OPERation?  
STATus:OPERation:CONDition?  
STATus:OPERation:ENABle  
STATus:OPERation:NTR STATus:OPERation:PTR  
STATus:QUEStionable?  
STATus:QUEStionable:CONDition?  
STATus:QUEStionable:ENABle  
STATus:QUEStionable:NTR STATus:QUEStionable:PTR  
*CLS  
*ESE  
*ESR?  
*OPC  
*PSC  
*SRE  
*STB?  
*WAI  
5
 
System Commands  
68  
68  
68  
68  
69  
69  
69  
70  
70  
70  
70  
71  
71  
71  
72  
72  
73  
73  
73  
73  
74  
74  
74  
75  
75  
76  
76  
77  
77  
78  
78  
79  
79  
79  
DISPlay  
DISPlay:MODE  
DISPlay:TEXT  
SYSTem:ERRor?  
SYSTem:LANGuage  
SYSTem:VERSion?  
SYSTem:LOCal  
SYSTem:REMote  
SYSTem:RWLock  
*IDN?  
*OPT?  
*RCL  
*RST  
*SAV  
*TST?  
Trigger Commands  
ABORt  
INITiate:SEQuence INITiate:NAME  
INITiate:CONTinuous:SEQuence1 INITiate:CONTinuous:NAME  
TRIGger  
TRIGger:SOURce  
TRIGger:SEQuence2 TRIGger:ACQuire  
TRIGger:SEQuence2:COUNt:CURRent TRIGger:ACQuire:COUNt:CURRent  
TRIGger:SEQuence2:COUNt:VOLTage TRIGger:ACQuire:COUNt:VOLTage  
TRIGger:SEQuence2:HYSTeresis:CURRent TRIGger:ACQuire:HYSTeresis:CURRent  
TRIGger:SEQuence2:HYSTeresis:VOLTage TRIGger:ACQuire:HYSTeresis:VOLTage  
TRIGger:SEQuence2:LEVel:CURRent TRIGger:ACQuire:LEVel:CURRent  
TRIGger:SEQuence2:LEVel:VOLTage TRIGger:ACQuire:LEVel:VOLTage  
TRIGger:SEQuence2:SLOPe:CURRent TRIGger:ACQuire:SLOPe:CURRent  
TRIGger:SEQuence2:SLOPe:VOLTage TRIGger:ACQuire:SLOPe:VOLTage  
TRIGger:SEQuence2:SOURce TRIGger:ACQuire:SOURce  
TRIGger:SEQuence1:DEFine TRIGger:SEQuence2:DEFine  
*TRG  
A - SCPI CONFORMANCE INFORMATION  
SCPI Version  
81  
81  
81  
81  
SCPI Confirmed Commands  
Non-SCPI Commands  
B - COMPATIBILITY LANGUAGE  
Introduction  
83  
83  
C - ERROR MESSAGES  
Error Number List  
89  
89  
D - EXAMPLE PROGRAMS  
Introduction  
93  
93  
93  
93  
94  
94  
94  
96  
98  
Assigning the GPIB Address in Programs  
Types of DOS Drivers  
Error Handling  
BASIC Controllers  
Example 1. HP Vectra PC Controller Using Agilent 82335 Interface  
Example 2. IBM Controller Using National Interface  
Example 3. Controller Using BASIC  
INDEX  
99  
6
 
1
General Information  
About this Guide  
This guide provides remote programming information for the following series of GPIB programmable dc  
power supplies:  
Agilent 66312A  
Agilent 66332A  
Agilent 6631B/6632B/6633B/6634B  
Agilent 6611C/6612C/6613C/6614C  
You will find the following information in the rest of this guide:  
Chapter 1  
Chapter 2  
Introduction to this guide.  
Introduction to SCPI messages structure, syntax, and data formats. Examples of SCPI  
programs  
Chapter 3  
Chapter 4  
Introducton to Programming the dc source with SCPI commands.  
Dictionary of SCPI commands.  
Appendix A SCPI conformance information.  
Appendix B Use of the alternate Comptibility programming language.  
Appendix C Error messages  
Documentation Summary  
The following documents that are related to this Programming Guide have additional helpful information  
for using the dc source.  
User’s Guide for Agilent 66312A and Agilent 6611C/6612C/6613C/3314C. Includes specifications  
and supplemental characteristics, how to use the front panel, how to connect to the instrument,  
and calibration procedures.  
User’s Guide for Agilent 66332A and Agilent 6631B/6632B/6633B/6634B. Includes specifications  
and supplemental characteristics, how to use the front panel, how to connect to the instrument,  
and calibration procedures.  
7
 
1 - General Information  
External References  
GPIB References  
The most important GPIB documents are your controller programming manuals - BASIC, GPIB Command  
Library for MS DOS, etc. Refer to these for all non-SCPI commands (for example: Local Lockout).  
The following are two formal documents concerning the GPIB interface:  
ANSI/IEEE Std. 488.1-1987 IEEE Standard Digital Interface for Programmable Instrumentation.  
Defines the technical details of the GPIB interface. While much of the information is beyond the  
need of most programmers, it can serve to clarify terms used in this guide and in related  
documents.  
ANSI/IEEE Std. 488.2-1987 IEEE Standard Codes, Formats, Protocols, and Common  
Commands. Recommended as a reference only if you intend to do fairly sophisticated  
programming. Helpful for finding precise definitions of certain types of SCPI message formats,  
data types, or common commands.  
The above two documents are available from the IEEE (Institute of Electrical and Electronics Engineers),  
345 East 47th Street, New York, NY 10017, USA. The WEB address is www.ieee.org.  
SCPI References  
The following documents will assist you with programming in SCPI:  
Standard Commands for Programmable Instruments Volume 1, Syntax and Style  
Standard Commands for Programmable Instruments Volume 2, Command References  
Standard Commands for Programmable Instruments Volume 3, Data Interchange Format  
Standard Commands for Programmable Instruments Volume 4, Instrument Classes  
To obtain a copy of the above documents, contact: Fred Bode, Executive Director, SCPI Consortium,  
8380 Hercules Drive, Suite P3, Ls Mesa, CA 91942, USA  
8
 
2
Introduction to Programming  
VXIplug&play Power Products Instrument Drivers  
VXIplug&play instrument drivers for Microsoft Windows 95 and Windows NT are now available on the  
Web at http://www.agilent.com/find/drivers. These instrument drivers provide a high-level programming  
interface to your Agilent Technologies instrument. VXIplug&play instrument drivers are an alternative to  
programming your instrument with SCPI command strings. Because the instrument driver’s function  
calls work together on top of the VISA I/O library, a single instrument driver can be used with multiple  
application environments.  
Supported Applications  
ñ
ñ
ñ
ñ
ñ
ñ
Agilent VEE  
Microsoft Visual BASIC  
Microsoft Visual C/C++  
Borland C/C++  
National Instruments LabVIEW  
National Instruments LabWindows/CVI  
System Requirements  
The VXIplug&play Power Products instrument driver complies with the following:  
ñ
ñ
ñ
ñ
Microsoft Windows 95  
Microsoft Windows NT 4.0  
HP VISA revision F.01.02  
National Instruments VISA 1.1  
Downloading and Installing the Driver  
NOTE:  
Before installing the VXIplug&play instrument driver, make sure that you have one of the  
supported applications installed and running on your computer.  
1. Access Agilent Technologies’ Web site at http://www.agilent.com/find/drivers.  
2. Select the instrument for which you need the driver.  
3. Click on the driver, either Windows 95 or Windows NT, and download the executable file to your  
pc.  
4. Locate the file that you downloaded from the Web. From the Start menu select Run  
<path>:\agxxxx.exe - where <path> is the directory path where the file is located, and agxxxx is  
the instrument driver that you downloaded .  
5. Follow the directions on the screen to install the software. The default installation selections will  
work in most cases. The readme.txt file contains product updates or corrections that are not  
documented in the on-line help. If you decide to install this file, use any text editor to open and  
read it.  
9
 
2 - Introduction to Programming  
6. To use the VXIplug&play instrument driver, follow the directions in the VXIplug&play online help  
under “Introduction to Programming”.  
Accessing Online Help  
A comprehensive online programming reference is provided with the driver. It describes how to get  
started using the instrument driver with Agilent VEE, LabVIEW, and LabWindows. It includes complete  
descriptions of all function calls as well as example programs in C/C++ and Visual BASIC.  
ñ
To access the online help when you have chosen the default Vxipnp start folder, click on the Start  
button and select Programs | Vxipnp | Agxxxx Help (32-bit).  
- where agxxxx is the instrument driver.  
GPIB Capabilities of the DC Source  
All dc source functions except for setting the GPIB address are programmable over the GPIB. The IEEE  
488.2 capabilities of the dc source are listed in the Specifications Table of the User's Guide.  
GPIB Address  
The dc source operates from an GPIB address that is set from the front panel. To set the GPIB address,  
press the Address key on the front panel and enter the address using the Entry keys. The GPIB address  
is stored in non-volatile memory.  
RS-232 Capabilities of the DC Source  
The dc source provides an RS-232 programming interface, which is activated by commands located under  
the front panel Address key. All SCPI and COMPatibility commands are available through RS-232  
programming. When the RS-232 interface is selected, the GPIB interface is disabled.  
The EIA RS-232 Standard defines the interconnections between Data Terminal Equipment (DTE) and  
Data Communications Equipment (DCE). The dc source is designed to be a DTE. It can be connected to  
another DTE such as a PC COM port through a null modem cable.  
NOTE:  
The RS-232 settings in your program must match the settings specified in the front panel  
Address menu. Press the front panel Address key if you need to change the settings.  
RS-232 Data Format  
The RS-232 data is a 10-bit word with one start bit and one stop bit. The number of start and stop bits is  
not programmable. However, the following parity options are selectable using the front panel Address key:  
EVEN  
ODD  
Seven data bits with even parity  
Seven data bits with odd parity  
MARK  
SPACE  
NONE  
Seven data bits with mark parity (parity is always true)  
Seven data bits with space parity (parity is always false)  
Eight data bits without parity  
Parity options are stored in non-volatile memory.  
10  
 
Introduction to Programming - 2  
Baud Rate  
The front panel Address key lets you select one of the following baud rates, which is stored in non-volatile  
memory:  
300  
600  
1200  
2400  
4800  
9600  
RS-232 Flow Control  
The RS-232 interface supports several flow control options that are selected using the front panel Address  
key. For each case, the dc source will send a maximum of five characters after holdoff is asserted by the  
controller. The dc source is capable of receiving as many as fifteen additional characters after it asserts  
holdoff.  
XON-XOFF  
RTS-CTS  
DTR-DSR  
NONE  
A software handshake that uses the ASCII control code DC3 (decimal code  
19) to assert hold-off, and control code DC1 (decimal code 17) to release  
hold-off.  
The dc source asserts its Request to Send (RTS) line to signal hold-off  
when its input buffer is almost full, and it interprets its Clear to Send (CTS)  
line as a hold-off signal from the controller.  
The dc source asserts its Data Terminal Ready (DTR) line to signal hold-off  
when its input buffer is almost full, and it interprets its Data Set Ready  
(DSR) line as a hold-off signal from the controller.  
There is no flow control.  
Flow control options are stored in non-volatile memory.  
RS-232 Programming Example  
The following program illustrates how to program the power supply using RS-232 to set the output voltage  
and current and to readback the model number and output voltage. The program was written to run on any  
controller using Microsoft QBasic.  
NOTE:  
The power supply must be configured for RS232 and the same baud rate and parity as  
the controller.  
‘ Program to write and read via RS232.  
‘ Configure the power supply for 9600 baud, even parity and RS232  
‘ Configure serial port for:”  
9600 baud  
‘ 7 bit data  
2 stop bits  
Ignore request to send  
Ignore carrier detect  
Even parity  
‘ Needed with Vectra basic, ignored with QBasic  
Send line feed  
Reserve 1000 character buffer for serial I/O  
DECLARE FUNCTION gets$ ()  
CLS  
‘ Clears screen  
LOCATE 1, 1  
‘ Position curser at top left  
‘ Configure Com Port  
OPEN “com1:9600,e,7,2,rs,cd,pe,lf” FOR RANDOM AS #1 LEN = 1000  
PRINT #1, “OUTPUT ON”  
PRINT #1, “VOLT 6”  
PRINT #1, “CURR .5”  
PRINT #1, “*IDN?”  
PRINT gets$  
‘ Turn on output then set voltage and current  
‘ Set voltage to 6 volts  
‘ Set current to 0.5 amps  
‘ Query the power supply identification string  
‘ Go to gets$ Function and print data returned  
‘ Query the power supply voltage  
‘ Convert gets$ string to a value  
‘ Print the value of the voltage  
‘ End of main program  
PRINT #1, MEAS”VOLT?”; volt  
Volt = VAL (gets$)  
PRINT gets$  
END  
11  
 
2 - Introduction to Programming  
FUNCTION gets$  
C$ = “”  
WHILE c$ <> CHR$ (10)  
C$ = INPUT$ (1, #1)  
Resp$ = resp$ + c$  
WEND  
‘ Get a new line feed terminated string from device #1  
‘ Set C$ to null  
‘ Set loop to stop at Line Feed  
‘ Read 1 bit into file #1  
‘ Concantenate bit with previous bits  
‘ End of WHILE loop  
gets$ = resp$  
END FUNCTION  
‘ Assign response to gets$  
RS-232 Troubleshooting  
If you are having trouble communicating over the RS-232 interface, check the following:  
The computer and the dc source must be configured for the same baud rate, parity, number of  
data bits, and flow control options. Note that the dc source is configured for 1 start bit and 1 stop  
bit (these values are fixed).  
The correct interface cables or adaptors must be used, as described under RS-232 Connector.  
Note that even if the cable has the proper connectors for your system, the internal wiring may be  
incorrect.  
The interface cable must be connected to the correct serial port on your computer (COM1, COM2,  
etc.).  
Introduction to SCPI  
SCPI (Standard Commands for Programmable Instruments) is a programming language for controlling  
instrument functions over the GPIB. SCPI is layered on top of the hardware-portion of IEEE 488.2. The  
same SCPI commands and parameters control the same functions in different classes of instruments. For  
example, you would use the same DISPlay command to control the dc source display and the display of a  
SCPI-compatible multimeter.  
Conventions Used in This Guide  
Angle brackets  
<
>
Items within angle brackets are parameter abbreviations. For example,  
<NR1> indicates a specific form of numerical data.  
Vertical bar  
|
Vertical bars separate alternative parameters. For example, NORM | TEXT  
indicates that either "TEXT" or "NORM" can be used as a parameter.  
Square Brackets  
[
]
Items within square brackets are optional. The representation [SOURce:].  
VOLTage means that SOURce: may be omitted.  
Braces  
{
}
Braces indicate parameters that may be repeated zero or more times. It is  
used especially for showing arrays. The notation <A>{<,B>} shows that  
parameter "A" must be entered, while parameter "B" may be omitted or  
may be entered one or more times.  
Boldface font is used to emphasize syntax in command definitions.  
Boldface font  
TRIGger:COUNt:CURRent <NRf> shows command definition.  
Computerfont  
Computer font is used to show program lines in text.  
TRIGger:COUNt:CURRent 10shows a program line.  
12  
 
Introduction to Programming - 2  
Types of SCPI Commands  
SCPI has two types of commands, common and subsystem.  
Common commands generally are not related to specfic operation but to controlling overall dc  
source functions, such as reset, status, and synchronization. All common commands consist of a  
three-letter nmemonic preceded by an asterisk: *RST *IDN? *SRE 8  
Subsystem commands perform specific dc source functions. They are organized into an inverted  
tree structure with the "root" at the top. The following figure shows a portion of a subsystem  
command tree, from which you access the commands located along the various paths. You can  
see the complete tree in Table 4-1.  
ROOT  
[:STATe]  
:DFI  
:OUTPut  
[:STATe]  
:SOURce  
:PON  
:STATe  
:PROTection  
:CLEar  
:DELay  
:OPERation  
:STATus  
?
[:EVEN]  
:CONDition?  
Figure 2-1. Partial Command Tree  
Multiple Commands in a Message  
Multiple SCPI commands can be combined and sent as a single message with one message terminator.  
There are two important considerations when sending several commands within a single message:  
Use a semicolon to separate commands within a message.  
There is an implied header path that affects how commands are interpreted by the dc source.  
The header path can be thought of as a string that gets inserted before each command within a message.  
For the first command in a message, the header path is a null string. For each subsequent command the  
header path is defined as the characters that make up the headers of the previous command in the  
message up to and including the last colon seperator. An example of a message with two commands is:  
CURR:LEV 3;PROT:STAT OFF  
which shows the use of the semicolon separating the two commands, and also illustrates the header path  
concept. Note that with the second command, the leading header "CURR" was omitted because after the  
"CURR:LEV 3" command, the header path was became defined as "CURR" and thus the instrument  
interpreted the second command as:  
CURR:PROT:STAT OFF  
In fact, it would have been syntactically incorrect to include the "CURR" explicitly in the second command,  
since the result after combining it with the header path would be:  
CURR:CURR:PROT:STAT OFF  
which is incorrect.  
13  
 
2 - Introduction to Programming  
Moving Among Subsystems  
In order to combine commands from different subsystems, you need to be able to reset the header path to  
a null string within a message. You do this by beginning the command with a colon (:), which discards any  
previous header path. For example, you could clear the output protection and check the status of the  
Operation Condition register in one message by using a root specifier as follows:  
OUTPut:PROTection:CLEAr;:STATus:OPERation:CONDition?  
The following message shows how to combine commands from different subsystems as well as within the  
same subsystem:  
VOLTage:LEVel 20;PROTection 28; :CURRent:LEVel 3;PROTection:STATe ON  
Note the use of the optional header LEVel to maintain the correct path within the voltage and current  
subsystems, and the use of the root specifier to move between subsytems.  
Including Common Commands  
You can combine common commands with system commands in the same message. Treat the common  
command as a message unit by separating it with a semicolon (the message unit separator). Common  
commands do not affect the header path; you may insert them anywhere in the message.  
VOLTage:TRIGgered 17.5;:INITialize;*TRG  
OUTPut OFF;*RCL 2;OUTPut ON  
Using Queries  
Observe the following precautions with queries:  
Set up the proper number of variables for the returned data.  
Read back all the results of a query before sending another command to the dc source. Otherwise  
a Query Interrupted error will occur and the unreturned data will be lost.  
Types of SCPI Messages  
There are two types of SCPI messages, program and response.  
A program message consists of one or more properly formatted SCPI commands sent from the  
controller to the dc source. The message, which may be sent at any time, requests the dc source  
to perform some action.  
A response message consists of data in a specific SCPI format sent from the dc source to the  
controller. The dc source sends the message only when commanded by a program message  
called a "query."  
The following figure illustrates SCPI message structure:  
14  
 
Introduction to Programming - 2  
Message Unit  
Data  
Keywords  
Query Indicator  
;
VOLT : LEV 20  
PROT 21 ; : CURR? <NL>  
Keyword Separator  
Message Unit Separators  
Message Terminator  
Root Specifier  
Figure 2-2. Command Message Structure  
The Message Unit  
The simplest SCPI command is a single message unit consisting of a command header (or keyword)  
followed by a message terminator. The message unit may include a parameter after the header. The  
parameter can be numeric or a string.  
ABORt<NL>  
VOLTage 20<NL>  
Headers  
Headers, also referred to as keywords, are instructions recognized by the dc source. Headers may be  
either in the long form or the short form. In the long form, the header is completely spelled out, such as  
VOLTAGE, STATUS, and DELAY. In the short form, the header has only the first three or four letters,  
such as VOLT, STAT, and DEL.  
Query Indicator  
Following a header with a question mark turns it into a query (VOLTage?, VOLTage:PROTection?). If a  
query contains a parameter, place the query indicator at the end of the last header  
(VOLTage:PROTection? MAX).  
Message Unit Separator  
When two or more message units are combined into a compound message, separate the units with a  
semicolon (STATus:OPERation?;QUEStionable?).  
Root Specifier  
When it precedes the first header of a message unit, the colon becomes the root specifier. It tells the  
command parser that this is the root or the top node of the command tree.  
Message Terminator  
A terminator informs SCPI that it has reached the end of a message. Three permitted messages  
terminators are:  
newline (<NL>), which is ASCII decimal 10 or hex 0A.  
end or identify (<END>)  
both of the above (<NL><END>).  
In the examples of this guide, there is an assumed message terminator at the end of each message.  
15  
 
2 - Introduction to Programming  
NOTE:  
All RS-232 response data sent by the dc source is terminated by the ASCII character pair  
<carriage return><newline>. This differs from GPIB response data which is terminated by  
the single character <newline> with EOI asserted.  
SCPI Data Formats  
All data programmed to or returned from the dc source is ASCII. The data may be numerical or character  
string.  
Numerical Data Formats  
Symbol  
Data Form  
Talking Formats  
<NR1>  
Digits with an implied decimal point assumed at the right of the least-significant digit.  
Examples: 273  
<NR2>  
<NR3>  
Digits with an explicit decimal point. Example: .0273  
Digits with an explicit decimal point and an exponent. Example: 2.73E+2  
Listening Formats  
<Nrf>  
Extended format that includes <NR1>, <NR2> and <NR3>. Examples: 273 273. 2.73E2  
<Nrf+>  
Expanded decimal format that includes <NRf> and MIN MAX. Examples: 273 273.  
2.73E2 MAX. MIN and MAX are the minimum and maximum limit values that are  
implicit in the range specification for the parameter.  
<Bool>  
Boolean Data. Example: 0 | 1 or ON | OFF  
Suffixes and Multipliers  
Class  
Current  
Amplitude  
Time  
Suffix  
Unit  
ampere  
volt  
second  
Unit with Multiplier  
MA (milliampere)  
MV (millivolt)  
A
V
S
MS (millisecond)  
Common Multipliers  
1E3  
1E-3  
1E-6  
K
M
U
kilo  
milli  
micro  
Response Data Types  
Character strings returned by query statements may take either of the the following forms, depending on  
the length of the returned string:  
<CRD>  
Character Response Data. Permits the return of character strings.  
<AARD>  
Arbitrary ASCII Response Data. Permits the return of undelimited 7-bit ASCII. This data type  
has an implied message terminator.  
<SRD>  
String Response Data. Returns string parameters enclosed in double quotes.  
16  
 
Introduction to Programming - 2  
SCPI Command Completion  
SCPI commands sent to the dc source are processed either sequentially or in parallel. Sequential  
commands finish execution before a subsequent command begins. Parallel commands allow other  
commands to begin executing while the parallel command is still executing. Commands that affect trigger  
actions are among the parallel commands.  
The *WAI, *OPC, and *OPC?common commands provide different ways of indicating when all  
transmitted commands, including any parallel ones, have completed their operations. The syntax and  
parameters for these commands are described in chapter 4. Some practical considerations for using  
these commands are as follows:  
*WAI  
This prevents the dc source from processing subsequent commands until all pending  
operations are completed.  
*OPC?  
This places a 1 in the Output Queue when all pending operations have completed.  
Because it requires your program to read the returned value before executing the next  
program statement, *OPC? can be used to cause the controller to wait for commands  
to complete before proceeding with its program.  
*OPC  
This sets the OPC status bit when all pending operations have completed. Since your  
program can read this status bit on an interrupt basis, *OPC allows subsequent  
commands to be executed.  
NOTE:  
The trigger subsystem must be in the Idle state in order for the status OPC bit to be true.  
Therefore, as far as triggers are concerned, OPC is false whenever the trigger subsystem  
is in the Initiated state.  
Using Device Clear  
You can send a device clear at any time abort a SCPI command that may be hanging up the GPIB  
interface. The status registers, the error queue, and all configuration states are left unchanged when a  
device clear message is received. Device clear performs the following actions:  
The input and output buffers of the dc source are cleared.  
The dc source is prepared to accept a new command string.  
The following statement shows how to send a device clear over the GPIB interface using Agilent BASIC:  
CLEAR 705 IEEE-488 Device Clear  
The following statement shows how to send a device clear over the GPIB interface using the GPIB  
command library for C or QuickBASIC:  
IOCLEAR (705)  
NOTE:  
For RS-232 operation, sending a Break will perform the same operation as the IEE-488  
device clear message.  
17  
 
 
3
Programming the DC Source  
Introduction  
This chapter contains examples on how to program your dc source. Simple examples show you how to  
program:  
u output functions such as voltage and current  
u internal and external triggers  
u measurement functions  
u the status and protection functions  
NOTE:  
These examples in this chapter show which commands are used to perform a particular  
function, but do not show the commands being used in any particular programming  
environment. Refer to Appendix D for some examples of SCPI commands in a specific  
programming environment.  
Programming the Output  
Power-on Initialization  
When the dc source is first turned on, it wakes up with the output state set OFF. In this state the output  
voltage is set to 0. The following commands are given implicitly at power-on:  
*RST  
*CLS  
STATus:PRESet  
*SRE 0  
*ESE 0  
*RST is a convenient way to program all parameters to a known state. Refer to the *RST command in  
chapter 4 to see how each programmable parameter is set by *RST. Refer to the *PSC command in  
chapter 4 for more information on the power-on initialization of the *ESE and the *SRE registers.  
Enabling the Output  
To enable the output, use the command:  
OUTPut ON  
19  
 
3 - Programming the DC Source  
Output Voltage  
The output voltage is controlled with the VOLTage command. For example, to set the output voltage to 25  
volts, use:  
VOLTage 125  
The dc source can be programmed to turn off its output if the output voltage exceeds a preset peak  
voltage limit. This protection feature is implemented with the VOLTage:PROTection command as  
explained in chapter 4.  
Maximum Voltage  
The maximum rms output voltage that can be programmed can be queried with:  
VOLTage? MAX  
Output Current  
All models have a programmable current function. The command to program the current is:  
CURRent <n>  
where <n> is the current limit in amperes.  
If the load attempts to draw more current than the programmed limit, the output voltage is reduced to keep  
the current within the limit.  
Maximum Current  
The maximum output current that can be programmed can be queried with:  
CURRent? MAX  
Overcurrent Protection  
The dc source can also be programmed to turn off its output if the current limit is reached. As explained in  
chapter 4, this protection feature is implemented the following command:  
CURRent:PROTection:STATe ON | OFF  
NOTE:  
Use OUTP:PROT:DEL to prevent momentary current limit conditions caused by  
programmed output changes from tripping the overcurrent protection.  
20  
 
Programming the DC Source - 3  
Triggering Output Changes  
The dc source has two independent trigger systems. One is used for generating output changes, and the  
other is used for triggering measurements. This section describes the output trigger system. The  
measurement trigger system is described under "Triggering Measurements".  
SCPI Triggering Nomenclature  
In SCPI terms, trigger systems are called sequences. When more than one trigger system exists, they are  
differentiated by naming them SEQuence1 and SEQuence2. SEQuence1 is the transient trigger system  
and SEQuence2 is the measurement trigger system. The dc source uses aliases with more descriptive  
names for these sequences. These aliases can be used instead of the sequence forms.  
Sequence Form  
SEQuence1  
SEQuence2  
Alias  
TRANsient  
ACQuire  
Output Trigger System Model  
Figure 3-1 is a model of the output trigger system. The rectangular boxes represent states. The arrows  
show the transitions between states. These are labeled with the input or event that causes the transition  
to occur.  
ABORt  
IDLE STATE  
*RST  
*RCL  
INITiate:CONTinuous OFF  
INITiate:CONTinuous ON  
INITiate[:IMMediate]  
INITIATED STATE  
TRIGGER RECEIVED  
OUTPUT  
LEVEL  
CHANGE  
Figure 3-1. Model of Output Triggers  
Setting the Voltage or Current Trigger Levels  
To program output trigger levels, you must first specify a voltage or current trigger level that the output will  
go to once a trigger signal is received. Use the following commands to set the output trigger level:  
VOLTage:TRIGgered <n> or  
CURRent:TRIGgered <n>  
NOTE:  
Until they are programmed, uninitialized trigger levels will assume their corresponding  
immediate levels. For example, if a dc source is powered up and VOLTage:LEVel is  
programmed to 6, then VOLTage:LEVel:TRIGger will also be 6 until you program it to  
another value. Once you program VOLTage:LEVel:TRIGger to a value, it will remain at  
that value regardless of how you subsequently reprogram VOLTage:LEVel.  
21  
 
3 - Programming the DC Source  
Initiating the Output Trigger System  
When the dc source is turned on, the trigger subsystem is in the idle state. In this state, the trigger  
subsystem ignores all triggers. Sending the following commands at any time returns the trigger system to  
the Idle state:  
ABORt  
*RST  
*RCL  
The INITiate commands move the trigger system from the Idle state to the Initiated state. This enables  
the dc source to receive triggers. To initiate for a single triggered action, use:  
INITiate:SEQuence1or  
INITiate:NAME TRANsient  
After a trigger is received and the action completes, the trigger system will return to the Idle state. Thus it  
will be necessary to initiate the system each time a triggered action is desired.  
To keep a trigger system initiated for multiple actions without having to send an initiate command for each  
trigger, use:  
INITiate:CONTinuous:SEQuence1 ON  
or  
INITiate:CONTinuous:NAME TRANsient, ON  
Generating Triggers  
You can only program output triggers over the GPIB bus. Since BUS is the only trigger source for output  
triggers, the following command is provided for completeness only:  
TRIGger:SOURce BUS  
After you have specified the appropriate trigger source, you can generate triggers as follows:  
Single Triggers  
Send one of the following commands over the GPIB:  
TRIGger:IMMediate  
*TRG  
a group execute trigger  
Continuous Triggers  
Send the following command over the GPIB:  
INITiate:CONTinuous:SEQuence1 ON  
When the trigger system enters the Output Change state upon receipt of a trigger (see figure 3-1), the  
triggered functions are set to their programmed trigger levels. When the triggered actions are completed,  
the trigger system returns to the Idle state.  
22  
 
Programming the DC Source - 3  
Making Measurements  
The dc source has the ability to make several types of voltage or current measurements. The  
measurement capabilities of the Agilent 66312A and Agilent 66332A models are particulary useful for  
loads that draw current in pulses.  
NOTE:  
You cannot measure output voltage and current simultaneously.  
All measurements are performed by digitizing the instantaneous output voltage or current for a defined  
number of samples and sample interval, storing the results in a buffer, and then calculating the measured  
result. Many parameters of the measurement are programmable. These include the number of samples,  
the time interval between samples, the bandwidth, and the method of triggering. Note that there is a  
tradeoff between these parameters and the speed, accuracy, and stability of the measurement in the  
presence of noise.  
There are two ways to make measurements:  
Use the MEASure commands to immediately start acquiring new voltage or current data, and  
return measurement calculations from this data as soon as the buffer is full. This is the easiest  
way to make measurements, since it requires no explicit trigger programming.  
Use an acquisition trigger to acquire the data. Then use the FETCh commands to return  
calculations from the data that was retrieved by the acquisition trigger. This method gives you the  
flexibility to synchronize the data acquisition with a transition in the output voltage or current.  
FETCh commands do not trigger the acquisition of new measurement data, but they can be used  
to return many different calculations from the data that was retrieved by the acquisition trigger.  
Note that if you take a voltage measurement, you can fetch only voltage data.  
Making triggered measurements with the acquisition trigger system is discussed under "Triggering  
Measurements".  
NOTE:  
For each MEASure form of the query, there is a corresponding query that begins with the  
header FETCh. FETCh queries perform the same calculation as their MEASure  
counterparts, but do not cause new data to be acquired. Data acquired by an explicit  
trigger or a previously programmed MEASure command are used.  
Voltage and Current Measurements  
The SCPI language provides a number of MEASure and FETCh queries which return various  
measurement parameters of voltage and current waveforms.  
DC Measurements  
To measure the dc output voltage or current, use:  
MEASure:VOLTage? or  
MEASure:CURRent?  
Dc voltage and current is measured by acquiring a number of readings at the selected time interval,  
applying a Hanning window function to the readings, and averaging the readings. Windowing is a signal  
conditioning process that reduces the error in dc measurements made in the presence of periodic signals  
such as line ripple. At power-on and after a *RST command, the following parameters are set:  
SENSe:SWEep:TINTerval 15.6E-6  
SENSe:SWEep:POINts 2048  
23  
 
3 - Programming the DC Source  
This results in a data acquisition time of 32 milliseconds. Adding a command processing overhead of  
about 20 milliseconds results in a total measurement time of about 50 milliseconds per measurement  
sample.  
Ripple rejection is a function of the number of cycles of the ripple frequency contained in the acquisition  
window. More cycles in the aquisition window results in better ripple rejection. If you increase the time  
interval for each measurement to 45 microseconds for example, this results in 5.53 cycles in the  
acquisition window at 60 Hz, for a ripple rejection of about 70 dB.  
Note that the speed of the measurement can be increased by reducing the number of sample points. For  
example, the commands  
SENSe:SWEep:TINTerval 15E-6  
SENSe:SWEep:POINts 1024  
speeds up the acquisition period to 16 milliseconds; however, the tradeoff is reduced measurement  
accuracy.  
RMS Measurements (Agilent 66312A, 66332A Only)  
To read the rms content of a voltage or current waveform, use:  
MEASure:VOLTage:ACDC? or  
MEASure:CURRent:ACDC?  
This returns the total rms measurement, including the dc portion.  
Making rms measurements on ac waveforms for which a non-integral number of cycles of data has been  
acquired may result in measurement errors due to the last partial cycle of acquired data. The instrument  
reduces this error by using a Hanning window function when making the measurement.  
Minimum and Maximum Measurements (Agilent 66312A, 66332A Only)  
To measure the maximum or minimum voltage or current of a pulse or ac waveform, use:  
MEASure:VOLTage:MAXimum?  
MEASure:VOLTage:MINimum?  
MEASure:CURRent:MAXimum?  
MEASure:CURRent:MINimum?  
Current Ranges  
The dc source has two current measurement ranges. The command that controls the ranges is:  
SENSe:CURRent:RANGe MIN | MAX  
When the range is set to MIN, the maximum current that can be measured is 20 milliamperes.  
Returning Measurement Data From the Data Buffer (Agilent 66312A, 66332A Only)  
The MEASure and FETCh queries can also return all data values of the instantaneous voltage or current  
buffer. The commands are:  
MEASure:ARRay:CURRent?  
MEASure:ARRay:VOLTage?  
24  
 
Programming the DC Source - 3  
Internally Triggered Measurements  
You can use the data acquisition trigger system to synchronize the timing of the voltage and current data  
acquisition with a BUS or internal trigger source. Then use the FETCh commands to return different  
calculations from the data acquired by the measurement trigger.  
SCPI Triggering Nomenclature  
As previously explained under "Triggering Output Changes", the dc source uses the following sequence  
name and alias for the measurement trigger system. This alias can be used instead of the sequence form.  
Sequence Form  
Alias  
SEQuence2  
ACQuire  
Measurement Trigger System Model  
Figure 3-2 is a model of the measurement trigger system. The rectangular boxes represent states. The  
arrows show the transitions between states. These are labeled with the input or event that causes the  
transition to occur.  
ABORt  
IDLE STATE  
*RST  
*RCL  
INITiate[:IMMediate]  
INITIATED STATE  
TRIGGER RECEIVED  
SENSe:SWEep:POINts  
ACQUIRED  
NO  
TRIGger:COUNt  
COMPLETE?  
YES  
Figure 3-2. Model of Measurement Triggers  
Initiating the Measurement Trigger System (Agilent 66312A, 66332A Only)  
When the dc source is turned on, the trigger system is in the idle state. In this state, the trigger system  
ignores all triggers. Sending the following commands at any time returns the trigger system to the Idle  
state:  
ABORt  
*RST  
*RCL  
The INITiate commands move the trigger system from the Idle state to the Initiated state. This enables  
the dc source to receive triggers. To initiate for a measurement trigger, use:  
25  
 
3 - Programming the DC Source  
INITiate:SEQuence2 or  
INITiate:NAME ACQuire  
After a trigger is received and the data acquisition completes, the trigger system will return to the Idle state  
(unless multiple measurements are desired). Thus it will be necessary to initiate the system each time a  
triggered acquisition is desired.  
NOTE:  
You cannot initiate measurement triggers continuously. Otherwise, the measurement data  
in the data buffer would continuously be overwritten by each triggered measurement.  
Selecting the Measurement Trigger Source (Agilent 66312A, 66332A Only)  
The trigger system is waiting for a trigger signal in the Initiated state. Before you generate a trigger, you  
must select a trigger source. The following measurement trigger sources can be selected:  
BUS -  
selects GPIB bus triggers.  
INTernal -  
selects the dc source’s output as the measurement trigger.  
To select GPIB bus triggers (group execute trigger, device trigger, or *TRG command), use:  
TRIGger:SEQuence2:SOURce BUS or  
TRIGger:ACQuire:SOURce BUS  
To select internal triggers (measurements triggered off the output signal) use:  
TRIGger:SEQuence2:SOURce INTernal or  
TRIGger:ACQuire:SOURce INTernal  
Generating Measurement Triggers (Agilent 66312A, 66332A Only)  
There is only one measurement converter in the dc source. Before you generate a measurement trigger,  
you must specify a measurement acquistion of either voltage or current. To specify a measurement  
acquisition use:  
SENSe:FUNCtion "CURRent" or  
SENSe:FUNCtion "VOLTage"  
Providing that you have specified the appropriate trigger source and a measurement acquisition, you can  
generate triggers as follows:  
GPIB Triggers  
Send one of the following commands over the GPIB:  
TRIGger:IMMediate(not affected by the trigger source setting)  
*TRG  
a group execute trigger  
Internal Triggers  
To trigger off of the output signal, you must specify the output level that generates  
the trigger, the rising or falling edge of the slope, and a hysteresis to qualify trigger  
conditions. This is illustrated in figure 3-3.  
26  
 
Programming the DC Source - 3  
Trigger occurs on falling edge  
Trigger occurs on rising edge  
when signal crosses positive  
hysteresis band limit  
when signal crosses negative  
hysteresis band limit  
TRIG:ACQ:HYST:CURR <value>  
TRIG:ACQ:HYST:VOLT  
TRIG:ACQ:LEV:CURR <level>  
TRIG:ACQ:LEV:VOLT  
TRIG:ACQ:SLOP:CURR  
TRIG:ACQ:SLOP:VOLT  
TRIG:ACQ:SLOP:CURR NEG  
TRIG:ACQ:SLOP:VOLT  
Figure 3-3. Trigger Commands Used to Measure Output Pulses  
To specify the output level that will generate triggers for both positive- and negative-going signals use:  
TRIGger:SEQuence2:LEVel:CURRent <value> or  
TRIGger:ACQuire:LEVel:CURRent <value>  
To specify the slope on which triggering occurs use the following commands. You can specify a POSitive,  
a NEGative, or EITHer type of slope.  
TRIGger:SEQuence2:SLOPe:CURRent <slope> or  
TRIGger:ACQuire:SLOPe:CURRent <slope>  
To specify a hysteresis band to qualify the positive- or negative-going signal use:  
TRIGger:SEQuence2:HYSTeresis:CURRent <value> or  
TRIGger:ACQuire:HYSTeresis:CURRent <value>  
NOTE:  
When using internal triggers, do not INITiate the measurement until after you have  
specified the slope, level, and hysteresis.  
When the acquisition finishes, any of the FETCh queries can be used to return the results. Once the  
measurement trigger is initiated, if a FETCh query is sent before the data acquisition is triggered or before  
it is finished, the response data will be delayed until the trigger occurs and the acquisition completes. This  
may tie up the controller if the trigger condition does not occur immediately.  
One way to wait for results without tying up the controller is to use the SCPI command completion  
commands. For example, you can send the *OPC command after INITialize, then occasionally poll the  
OPC status bit in the standard event status register for status completion while doing other tasks. You can  
also set up an SRQ condition on the OPC status bit going true, and do other tasks until an SRQ interrupt  
occurs.  
27  
 
3 - Programming the DC Source  
Measuring Output Pulses (Agilent 66312A, 66332A Only)  
Current Detector  
Check that the current detector is set to ACDC when measuring current pulses or other waveforms with a  
frequency content greater than a few kilohertz.  
SENSe:CURRent:DETect ACDC  
Only select DC as the measurement detector if you are making only DC current measurements and you  
require a measurement offset better than 2mA on the High current measurement range. Note that this  
selection gives inaccurate results on current waveforms that have ac content.  
SENSe:CURRent:DETect DC  
Pulse Measurement Queries  
The dc source has several measurement queries that return key parameters of pulsewaveforms as shown  
in Figure 3-4.  
FETC:CURR:MAX?  
FETC:VOLT:MAX?  
FETC:CURR:HIGH?  
FETC:VOLT:HIGH?  
FETC:CURR:LOW?  
FETC:VOLT:LOW?  
DATA POINTS  
FETC:CURR:MIN?  
FETC:VOLT:MIN?  
Figure 3-4. Measurement Commands Used to Return Pulse Data  
To return the maximum or minimum value of a pulse waveform use the following commands. Note that  
the data points of the measurement sample may not coincide with the actual maximum or minimum point  
on the waveform.  
FETCh:VOLTage:MAXimum? or  
FETCh:VOLTage:MINimum?  
FETCh:CURRent:MAXimum? or  
FETCh:CURRent:MINimum?  
The average value of the high level or low level of a pulse can also be measured. To return the average  
value of the high level, use:  
FETCh:CURRent:HIGH? or  
FETCh:VOLTage:HIGH?  
To return the average value of the low level, use:  
FETCh:CURRent:LOW? or  
FETCh:VOLTage:LOW?  
28  
 
Programming the DC Source - 3  
Controlling Measurement Samples  
Varying the Voltage or Current Sampling Rate  
You can vary both the number of data points in a measurement sample, as well as the time between  
samples. This is illustrated in Figure 3-5.  
SENS:SWE:TINT <time>  
SENS:SWE:POIN <# of points>  
TRIG:ACQ:COUN:CURR <# of sweeps>  
Figure 3-5. Sense Commands Used to Vary the Sampling Rate  
At *RST, the output voltage or current sampling rate is 15.6 microseconds. This means that it takes about  
32 milliseconds to fill up 2048 data points in the data buffer. You can vary this data sampling rate with:  
SENSe:SWEep:TINTerval <sample_period>  
SENSe:SWEep:POINts <points>  
For example, to set the time interval to 46.8 microseconds per sample with 1500 samples, use  
SENSe:SWEep:TINTerval 46.8E-6;POINts 1500.  
Multiple Measurements (Agilent 66312A, 66332A Only)  
The instrument also has the ability to set up several acquisition triggers in succession and average the  
results from each acquisition in the returned measurement. To set up the trigger system for a number of  
sequential aquisitions use:  
TRIGger:ACQuire:COUNt:CURRent <number> or  
TRIGger:ACQuire:COUNt:VOLTage <number>  
With this setup, the instrument performs each acquisition sequentially, storing the digitized readings in the  
internal measurement buffer. It is only necessary to initialize the measurement once at the start; after  
each completed aquisition the instrument will wait for the next valid trigger condition to start another. The  
results returned by MEASure or FETCh will be the average of the total data acquired.  
NOTE:  
The total number of data points cannot exceed 4096. This means that the product of the  
trigger count multiplied by the sweep points cannot exceed 4096; otherwise an error will  
occur.  
29  
 
3 - Programming the DC Source  
Pre-event and Post-event Triggering (Agilent 66312A, 66332A Only)  
When a measurement is initiated, the dc source continuously samples either the instantaneous output  
voltage or current. As shown in figure 3-6, you can move the block of data being read into the acquisition  
buffer with reference to the acquisition trigger. This permits pre-event or post-event data sampling.  
OFFSET = -4096  
4096 DATA POINTS  
OFFSET = -2048  
4096 DATA POINTS  
OFFSET = 0  
4096 DATA POINTS  
9
OFFSET = 0 to 2  
4096 DATA POINTS  
TIME  
ACQUISITION  
TRIGGER  
Figure 3-6. Pre-event and Post-event Triggering  
To offset the beginning of the acquisition buffer relative to the acquisition trigger, use:  
SENSe:SWEep:OFFSet:POINts <offset>  
The range for the offset is -4096 to 2,000,000,000 points. As shown in the figure, when the offset is  
negative, the values at the beginning of the data record represent samples taken prior to the trigger. When  
the value is 0, all of the values are taken after the trigger. Values greater than zero can be used to  
program a delay time from the receipt of the trigger until the data points that are entered into the buffer are  
valid. (Delay time = Offset X Sample period)  
Pulse Measurement Example (Agilent 66312A, 66332A only)  
The following program illustrates how to make a pulse measurement over the GPIB. The measurement  
function is set to ACDC, which gives the best results for current waveforms that have ac content. The  
measurement incorporates 100 readings taken at time intervals of 20 microseconds, for a total  
measurement time of 2 milliseconds. The trigger point for the pulse measurement occurs at 0.1 amperes  
on the positive slope of the current pulse. The measurement offset is programmed so that 20  
measurement points prior to the trigger are also returned as part of the measurement sample.  
Because measurement triggers are initiated by the current pulse, a FETCh command is used to return the  
measurement data. FETCh commands are also used to return the MAXimum, MINimum, HIGH, and LOW  
values of the measurement.  
NOTE:  
MEASure commands cannot be used to return data in this example because they always  
acquire NEW measurement data each time they are used.  
The program can be run on any controller operating under Agilent BASIC. To generate output pulses, an  
electronic load is programmed to generate 3-ampere pulses with a duty cycle of 100 microseconds at  
1000 Hz. The power supply address is 705, and the load address is 706. If required, change these  
parameters in the appropriate statements.  
30  
 
Programming the DC Source - 3  
10  
20  
!Rev A.00.00  
OPTION BASE 1  
30  
40  
DIM Curr_array(100)  
!
50  
60  
ASSIGN @Ps TO 705  
ASSIGN @Ld TO 706  
80  
90  
OUTPUT @Ps;"*RST"  
! Sets supply to default values  
! Turn on power supply output  
! Program power supply to 5 volts, 5 amps  
OUTPUT @Ps;"OUTP ON"  
OUTPUT @Ps;"VOLT 5;CURR 5"  
!
100  
110  
120  
130  
140  
150  
160  
170  
180  
190  
200  
210  
220  
230  
240  
250  
260  
270  
280  
290  
300  
310  
320  
330  
340  
350  
360  
370  
380  
390  
400  
410  
420  
430  
440  
450  
460  
470  
480  
490  
500  
510  
520  
530  
OUTPUT @Ld;"CURR:LEVEL 0"  
OUTPUT @Ld;"CURR:TLEVEL 3"  
!
OUTPUT @Ld;"TRAN:FREQ 1000"  
OUTPUT @Ld;"TRAN:DCYCLE 10"  
OUTPUT @Ld;"TRAN:MODE CONT"  
OUTPUT @Ld;"TRAN:STATE ON"  
!
OUTPUT @Ps;"SENS:CURR:DET ACDC"  
OUTPUT @Ps;"SENS:CURR:RANG MAX"  
OUTPUT @Ps;"TRIG:ACQ:SOUR INT"  
OUTPUT @Ps;"SENS:FUNC ""CURR"""  
OUTPUT @Ps;"TRIG:ACQ:LEV:CURR .1"  
OUTPUT @Ps;"TRIG:ACQ:SLOPE:CURR POS" ! Trigger on positive slope  
OUTPUT @Ps;"TRIG:ACQ:HYST:CURR .05" ! Set hysteresis of trigger  
! Set up electronic load to produce pulses  
! Set meter to ACDC  
! High Current range  
! Set to trigger on pulse  
! Acquire current reading  
! Trigger at 0.1 amps  
OUTPUT @Ps;"SENS:SWE:TINT 20E-6"  
OUTPUT @Ps;"SENS:SWE:POIN 100"  
OUTPUT 705;"SENS:SWE:OFFS:POIN -20" ! Number of sample points before trigger  
! Set sample time interval to 20us  
! Set number of measurement samples in sweep  
OUTPUT @Ps;"INIT:NAME ACQ"  
! Initiate the trigger system.  
Controller now waits for trigger to occur.  
! Get the data after measurement completes.  
!
OUTPUT @Ps;"FETCH:ARRAY:CURR?"  
!
ENTER @Ps;Curr_array(*)  
PRINT Curr_array(*)  
!
! Enters all 100 data points  
! Print all data points  
OUTPUT @Ps;"FETCH:CURR:MAX?"  
ENTER @Ps;Curr_max  
PRINT "MAX CURRENT",Curr_max  
!
OUTPUT @Ps;"FETCH:CURR:MIN?"  
ENTER @Ps;Curr_min  
PRINT "MIN CURRENT",Curr_min  
!
OUTPUT @Ps;"FETCH:CURR:HIGH?"  
ENTER @Ps;Curr_hi  
PRINT "HIGH CURRENT",Curr_hi  
!
OUTPUT @Ps;"FETCH:CURR:LOW?"  
ENTER @Ps;Curr_low  
PRINT "LOW CURRENT",Curr_low  
!
! Get more data from previous measurement.  
END  
When this program runs, it returns 100 measurement data points as well as the MIN, MAX, HIGH, and  
LOW data in the following format:  
.030585  
.031869  
.0344369  
.031227  
.0325109  
.977283  
.031655  
.031441  
.0333669  
.0667496  
.0327249  
.031655  
.0340089  
.031227  
.031655  
.031869  
.0340089  
.0836549  
.0333669  
.0320829  
.0337949  
3.09751  
.0245932  
.031227  
.031869  
.0348648  
.031441  
.031869  
.031655  
2.97661  
.0258772  
.0325109  
.0327249  
3.1814  
.0333669  
.031869  
3.14266  
.031013  
.031227  
.031869  
.031227  
.031449  
.031869  
.0320829  
3.14523  
.0275891  
.0340089  
.031655  
3.13667  
.031655  
.030799  
.0322869  
.0327249  
.0333669  
.0293011  
.031227  
3.13496  
.0329389  
.0320825 .031449  
.0327249 .031013  
3.13817  
3.13624  
.0280171  
.0327249  
.0329389  
.0327249  
.0337949  
.0329389  
.031655  
3.18632  
.0284451  
.0331529 .0350788 .0348648  
.031869 .0329389 .030371  
.0320829 .0325109 .0333669  
.0320829 .030371  
.031449  
.031441  
.031441  
.0337949 .030371  
.0337949 .0327249  
.0322969 .031655  
.0327249  
1.32438  
3.13453  
3.13731  
.0329389 .0333669 .0322969  
MAX CURRENT  
MIN CURRENT  
HIGH CURRENT  
LOW CURRENT  
3.18632  
.0245932  
3.1371  
.0314077  
31  
 
3 - Programming the DC Source  
Programming the Status Registers  
You can use status register programming to determine the operating condition of the dc source at any  
time. For example, you may program the dc source to generate an interrupt (assert SRQ) when an event  
such as a current limit occurs. When the interrupt occurs, your program can then act on the event in the  
appropriate fashion.  
Figure 3-7 shows the status register structure of the dc source. Table 3-1 defines the status bits. The  
Standard Event, Status Byte, and Service Request Enable registers and the Output Queue perform  
standard GPIB functions as defined in the IEEE 488.2 Standard Digital Interface for Programmable  
Instrumentation. The Operation Status and Questionable Status registers implement functions that are  
specific to the dc source.  
Power-On Conditions  
Refer to the *RST command description in chapter 4 for the power-on conditions of the status registers.  
QUESTIONABLE STATUS  
CONDITION  
PTR/NTR  
EVENT  
ENABLE  
0
1
1
2
4
1
2
4
1
2
4
OV  
OCP  
FS  
1
2
4
2
3
N.U.  
OT  
4
OFF  
16  
16  
16  
16  
5-8  
9
N.U.  
RI  
512  
512  
512  
512  
FLT  
10  
1024  
1024  
1024  
Unreg  
1024  
11-13  
14  
N.U.  
16384  
16384  
16384  
16384  
MeasOvld  
15  
N.U.  
SERVICE  
REQUEST  
ENABLE  
STATUS BYTE  
STANDARD EVENT STATUS  
OUTPUT QUEUE  
N.U.  
0-2  
EVENT  
1
ENABLE  
1
QUEUE  
NOT  
DATA  
DATA  
DATA  
3
QUES  
0
1
8
8
OPC  
N.U.  
QYE  
DDE  
EXE  
CME  
N.U.  
EMPTY  
4
5
MAV  
ESB  
16  
32  
16  
32  
2
3
4
5
6
7
4
8
4
8
6
7
MSS  
OPER  
16  
32  
16  
32  
64  
128  
128  
128  
128  
PON  
OPERATION STATUS  
RQS  
CONDITION  
1
PTR/NTR  
EVENT  
1
ENABLE  
1
SERVICE  
REQUEST  
GENERATION  
0
1
CAL  
N.U.  
WTG  
N.U.  
CV  
1-4  
5
32  
32  
32  
32  
6,7  
8
256  
256  
256  
256  
9
N.U.  
512  
512  
512  
512  
10  
1024  
1024  
1024  
1024  
CC+  
CC-  
N.U.  
11  
2048  
2048  
2048  
2048  
12-15  
Figure 3-7. DC Source Status Model  
32  
 
Programming the DC Source - 3  
Table 3-1. Bit Configurations of Status Registers  
Bit  
Signal  
Meaning  
Operation Status Group  
0
5
8
10  
11  
CAL  
WTG  
CV  
CC+  
CC-  
The dc source is computing new calibration constants  
The dc source is waiting for a trigger  
The dc source is in constant voltage mode  
The dc source is in constant current mode  
The dc source is in negative constant current mode  
Questionable Status Group  
0
1
2
OV  
OCP  
FS  
The overvoltage protection has tripped  
The overcurrent protection has tripped  
The fuse is blown  
4
9
10  
14  
OT  
RI  
Unreg  
MeasOvld  
The overtemperature protection has tripped  
The remote inhibit state is active  
The output is unregulated  
Current measurement exceeded capability of low range  
Standard Event Status Group  
Operation complete  
Query error  
Device-dependent error  
Execution error  
Command error  
0
2
3
4
5
7
OPC  
QYE  
DDE  
EXE  
CME  
PON  
Power-on  
Status Byte and Service Request Enable Registers  
Questionable status summary bit  
Message Available summary bit  
Event Status Summary bit  
Master Status Summary bit  
Request Service bit  
3
4
5
6
QUES  
MAV  
ESB  
MSS  
RQS  
OPER  
7
Operation status summary bit  
Operation Status Group  
The Operation Status registers record signals that occur during normal operation. As shown below, the  
group consists of a Condition, PTR/NTR, Event, and Enable register. The outputs of the Operation Status  
register group are logically-ORed into the OPER(ation) summary bit (7) of the Status Byte register.  
Register  
Condition  
Command  
STAT:OPER:COND?  
Description  
A register that holds real-time status of the circuits being  
monitored. It is a read-only register.  
STAT:OPER:PTR <n>  
STAT:OPER:NTR <n>  
STAT:OPER:EVEN?  
PTR Filter  
NTR Filter  
Event  
A positive transistion filter that functions as described under  
STAT:OPER:NTR|PTRcommands in chapter 4. It is a  
read/write register.  
A negative transition filter that functions as described under  
STAT:OPER:NTR|PTRcommands in chapter 4. It is a  
read/write register.  
A register that latches any condition that is passed through the  
PTR or NTR filters. It is a read-only register that is cleared  
when read.  
STAT:OPER:ENAB <n>  
Enable  
A register that functions as a mask for enabling specific bits  
from the Event register. It is a read/write register.  
33  
 
3 - Programming the DC Source  
Questionable Status Group  
The Questionable Status registers record signals that indicate abnormal operation of the dc source. As  
shown in figure 3-7, the group consists of the same type of registers as the Status Operation group. The  
outputs of the Questionable Status group are logically-ORed into the QUEStionable summary bit (3) of the  
Status Byte register.  
Register  
Command  
Description  
Condition  
STAT:QUES:COND?  
A register that holds real-time status of the circuits being  
monitored. It is a read-only register.  
PTR Filter  
NTR Filter  
Event  
STAT:QUES:PTR <n>  
STAT:QUES:NTR <n>  
STAT:QUES:EVEN?  
STAT:QUES:ENAB <n>  
A positive transistion filter that functions as described under  
STAT:QUES:NTR|PTRcommands in chapter 4. It is a  
read/write register.  
A negative transition filter that functions as described under  
STAT:QUES:NTR|PTRcommands in chapter 4. It is a  
read/write register.  
A register that latches any condition that is passed through the  
PTR or NTR filters. It is a read-only register that is cleared  
when read.  
A register that functions as a mask for enabling specific bits  
from the Event register. It is a read/write register..  
Enable  
Standard Event Status Group  
This group consists of an Event register and an Enable register that are programmed by Common  
commands. The Standard Event event register latches events relating to instrument communication status  
(see figure 3-7). It is a read-only register that is cleared when read. The Standard Event enable register  
functions similarly to the enable registers of the Operation and Questionable status groups.  
Command  
*ESE  
*PSC ON  
*ESR?  
Action  
programs specific bits in the Standard Event enable register.  
clears the Standard Event enable register at power-on.  
reads and clears the Standard Event event register.  
The PON (Power On) Bit  
The PON bit in the Standard Event event register is set whenever the dc source is turned on. The most  
common use for PON is to generate an SRQ at power-on following an unexpected loss of power. To do  
this, bit 7 of the Standard Event enable register must be set so that a power-on event registers in the ESB  
(Standard Event Summary Bit), bit 5 of the Service Request Enable register must be set to permit an SRQ  
to be generated, and *PSC OFF must be sent. The commands to accomplish these conditions are:  
*PSC OFF *ESE 128 *SRE 32  
Status Byte Register  
This register summarizes the information from all other status groups as defined in the IEEE 488.2  
Standard Digital Interface for Programmable Instrumentation. The bit configuration is shown in Table 3-1.  
Command  
*STB?  
serial poll  
Action  
reads the data in the register but does not clear it (returns MSS in bit 6)  
clears RQS inside the register and returns it in bit position 6 of the response.  
34  
 
Programming the DC Source - 3  
The MSS Bit  
This is a real-time (unlatched) summary of all Status Byte register bits that are enabled by the Service  
Request Enable register. MSS is set whenever the dc source has one or more reasons for requesting  
service. *STB? reads the MSS in bit position 6 of the response but does not clear any of the bits in the  
Status Byte register.  
The RQS Bit  
The RQS bit is a latched version of the MSS bit. Whenever the dc source requests service, it sets the  
SRQ interrupt line true and latches RQS into bit 6 of the Status Byte register. When the controller does a  
serial poll, RQS is cleared inside the register and returned in bit position 6 of the response. The remaining  
bits of the Status Byte register are not disturbed.  
The MAV Bit and Output Queue  
The Output Queue is a first-in, first-out (FIFO) data register that stores dc source-to-controller messages  
until the controller reads them. Whenever the queue holds one or more bytes, it sets the MAV bit (4) of the  
Status Byte register.  
Determining the Cause of a Service Interrupt  
You can determine the reason for an SRQ by the following actions:  
Step 1  
Step 2  
Determine which summary bits are active. Use:  
*STB? or serial poll  
Read the corresponding Event register for each summary bit to determine which events  
caused the summary bit to be set. Use:  
STATus:QUEStionable:EVENt?  
STATus:OPERation:EVENt?  
ESR?  
When an Event register is read, it is cleared. This also clears the corresponding  
summary bit.  
Step 3  
Remove the specific condition that caused the event. If this is not possible, the event  
may be disabled by programming the corresponding bit of the status group Enable  
register or NTR|PTR filter. A faster way to prevent the interrupt is to disable the service  
request by programming the appropriate bit of the Service Request Enable register  
Servicing Operation Status and Questionable Status Events  
This example assumes you want a service request generated whenever the dc source switches to the CC  
(constant current) operating mode, or whenever the dc source’s overvoltage, overcurrent, or  
overtemperature circuits have tripped. From figure 3-7, note the required path for a condition at bit 10  
(CC) of the Operation Status register to set bit 6 (RQS) of the Status Byte register. Also note the required  
path for Questionable Status conditions at bits 0, 1, and 4 to generate a service request (RQS) at the  
Status Byte register. The required register programming is as follows:  
Step 1  
Program the Operation Status PTR register to allow a positive transition at bit 10 to be  
latched into the Operation Status Event register, and allow the latched event to be  
summed into the Operation summary bit. Use:  
STATus:OPERation:PTR 1024;ENABle 1024  
Step 2  
Program the Questionable Status PTR register to allow a positive transition at bits 0,  
1, or 4 to be latched into the Questionable Status Event register, and allow the latched  
35  
 
3 - Programming the DC Source  
event to be summed into the Questionable summary bit. Use:  
STATus:QUEStionable:PTR 19;ENABle 19  
(1 + 2 + 16 = 19)  
Step 3  
Step 4  
Program the Service Request Enable register to allow both the Operation and the  
Questionable summary bits from the Status Byte register to generate RQS. Use:  
*SRE 136  
(8 + 128 = 136)  
When you service the request, read the event registers to determine which Operation  
Status and Questionable Status Event register bits are set, and clear the registers for  
the next event. Use:  
STATus:OPERation:EVENt;QUEStionable:EVENt?  
Monitoring Both Phases of a Status Transition  
You can monitor a status signal for both its positive and negative transitions. For example, to generate  
RQS when the dc source either enters the CC+ (constant current) condition or leaves that condition,  
program the Operational Status PTR/NTR filter as follows:  
STATus:OPERational:PTR 1024;NTR 1024  
STATus:OPERational:ENABle 1024;*SRE 128  
The PTR filter will cause the OPERational summary bit to set RQS when CC+ occurs. When the  
controller subsequently reads the event register with STATus:OPERational:EVEN?, the register is cleared.  
When CC+ subsequently goes false, the NTR filter causes the OPERational summary bit to again set  
RQS.  
Inhibit/Fault Indicator  
The remote inhibit(INH) and discrete fault(FLT) indicators are implemented through the respective INH  
and FLT connections on the rear panel. Refer to Table 1-2 for the electrical parameters.  
Remote Inhibit (RI)  
Remote inhibit is an external, chassis-referenced logic signal routed through the rear panel INH  
connection, which allows an external device to signal a fault. To select an operating modes for the remote  
inhibit signal, use:  
OUTPut:RI:MODE LATChing | LIVE | OFF  
Discrete Fault Indicator (DFI)  
The discrete fault indicator is an open-collector logic signal connected to the rear panel FLT connection,  
that can be used to signal external devices when a fault condition is detected. To select the internal fault  
source that drives this signal, use:  
OUTPut:DFI:SOURce QUEStionable | OPERation | ESB | RQS | OFF  
To enable or disable the DFI output, use:  
OUTPut:DFI:STATe ON | OFF  
36  
 
Programming the DC Source - 3  
Using the Inhibit/Fault Port as a Digital I/O  
You can configure the inhibit/fault port to provide a digital input/output to be used with custom digital  
interface circuits or relay circuits. As shipped from the factory, the port is shipped for inhibit/fault operation.  
You can change the configuration of the port to operate as a general purpose digital input output port with  
the following command:  
[SOURce:]DIGital:FUNCtion RIDFi | DIGio  
The following table shows the bin assignments of the mating plug when used in RI/DFImode as well as  
Digital I/O mode. Refer to Table 1-2 for the electrical characteristics of the port.  
Pin  
1
2
3
4
FAULT/INHIBIT  
FLT Output  
FLT Output  
INH Input  
DIGITAL I/O  
OUT 0  
OUT 1  
IN/OUT 2  
Common  
Bit Weight  
0
1
2
INH Common  
not programmable  
To program the digital I/O port use:  
[SOURce:]DIGital:DATA <data>  
where the data is an integer from 0 to 7 that sets pins 1 to 3 according to their binary weight. Refer to the  
DIGital:DATA command for more information.  
DFI Programming Example  
The following program illustrates how to program the DFI port so that it goes low when an OCP condition  
turns off the output of the unit. To clear an overcurrent condition, the cause of the condition must first be  
removed and then an OUTput:PROTection:CLEar command must be sent. Note that the status event  
register will not clear the DFI port until the register is read.  
10  
!Rev A.00.00  
20  
ASSIGN @Ps TO 705  
30  
OUTPUT @Ps;"*RST"  
! Sets supply to default values  
! Turn on power supply output  
! Program power supply voltage and current  
40  
OUTPUT @Ps;"OUTP ON"  
OUTPUT @Ps;"VOLT 10;CURR .1"  
!
50  
60  
70  
OUTPUT @Ld;"CURR:PROT:STAT ON"  
OUTPUT @Ld;"OUTP:DFI:STAT ON"  
OUTPUT @Ld;"OUTP:DFI:SOUR QUES"  
! Turn on overcurrent protection  
! Turn on DFI port  
80  
90  
! Select DFI bit from Questionable status register  
OUTPUT @Ld;"STAT:QUES:ENAB 2;PTR 2" ! Unmask bit 2 (OCP) on positive transition  
!
100  
110  
120  
130  
140  
190  
OUTPUT @Ld;"OUTP:PROT:CLE"  
OUTPUT @Ld;"STAT:QUES:EVENT?"  
ENTER @Ld;EVENT  
! Clears the protection circuit  
! Clears the Event register and DFI  
! Reads the event and clears the buffer  
!
37  
 
 
4
Language Dictionary  
Introduction  
This section gives the syntax and parameters for all the IEEE 488.2 SCPI commands and the Common  
commands used by the dc source. It is assumed that you are familiar with the material in “Chapter 2 -  
"Remote Programming". That chapter explains the terms, symbols, and syntactical structures used here  
and gives an introduction to programming. You should also be familiar with “Chapter 4 - Front Panel  
Operation” (in the Operating Guide) in order to understand how the dc source functions.  
The programming examples are simple applications of SCPI commands. Because the SCPI syntax  
remains the same for all programming languages, the examples given for each command are generic.  
Syntax Forms  
Parameters  
Models  
Syntax definitions use the long form, but only short form headers (or "keywords")  
appear in the examples. Use the long form to help make your program self-  
documenting.  
Most commands require a parameter and all queries will return a parameter.The range  
for a parameter may vary according to the model of dc source. When this is the case,  
refer to the Specifications table in the Operating Guide.  
If a command only applies to specific models, those models are listed in the <Model>  
Only entry. If there is no <Model> Only entry, the command applies to all models.  
Related  
Commands  
Where appropriate, related commands or queries are included. These are listed  
because they are either directly related by function, or because reading about them will  
clarify or enhance your understanding of the original command or query.  
Order of  
Presentation  
The dictionary is organized according to the following functions: calibration,  
measurement, output, status, system, and trigger. Both the subsystem commands and  
the common commands that follow are arranged in alphabetical order under each  
function.  
Subsystem Commands  
Subsystem commands are specific to functions. They can be a single command or a group of  
commands. The groups are comprised of commands that extend one or more levels below the root.  
The subsystem command groups are grouped according to function: Calibration, Measurement, Output,  
Status, System, and Trigger. Commands under each function are grouped alphabetically. Commands  
followed by a question mark (?) take only the query form. When commands take both the command and  
query form, this is noted in the syntax descriptions. Table 4-1 lists all of the subsystem commands  
inalphabetical order.  
39  
 
4 - Language Dictionary  
Table 4-1. Subsystem Commands Syntax  
ABORt  
Resets the trigger system to the Idle state  
:
CALibrate  
:CURRent  
[:SOURce]  
[:DC] [:POSitive]  
Calibrate positive output current and high current  
measurement range  
:NEGative  
:MEASure  
Calibrate negative output current  
[:DC] :LOWRange  
:AC  
:DATA <n>  
Calibrate low current measurement range  
Calibrate ac current measurement circuits  
Input a calibration measurement  
:LEVel <level>  
:PASSword <n>  
:SAVE  
:STATE <bool> [,<n>]  
:VOLTage  
Advance to next calibration step (P1 | P2)  
Set calibration password  
Save new cal constants in non-volatile memory  
Enable or disable calibration mode  
[:DC]  
:PROTection  
Calibrate output voltage and voltage readback  
Begin voltage protection calibration sequence  
DISPlay  
[:WINDow]  
[:STATe] <bool>  
:MODE <mode>  
:TEXT [:DATA] <string>  
Enable/disable front panel display  
Set display mode (NORM | TEXT)  
Sets the text that is displayed  
INITiate  
[:IMMediate]  
:SEQuence[<n>]  
:NAME <name>  
CONTinuous  
Initiate a specific numbered sequence (1 | 2)  
Initiate a specific named sequence (TRAN | ACQ)  
:SEQuence1, <bool>  
Set continuous initialization  
:NAME TRANsient, <bool>  
Set continuous initialization  
MEASure | FETCh  
:ARRay  
:CURRent [:DC]?  
:VOLTage [:DC]?  
[:SCALar]  
:CURRent [:DC]?  
:ACDC?  
Returns the digitized instantaneous current  
Returns the digitized instantaneous voltage  
Returns dc current  
Returns the total rms current (ac+dc)  
Returns the HIGH level of a current pulse  
Returns the LOW level of a current pulse  
Returns maximum current  
:HIGH?  
:LOW?  
:MAX?  
:MIN?  
Returns minimum current  
:VOLTage [:DC]?  
Returns dc voltage  
:ACDC?  
:HIGH?  
:LOW?  
:MAX?  
:MIN?  
Returns the total rms voltage (ac+dc)  
Returns the HIGH level of a voltage pulse  
Returns the LOW level of a voltage pulse  
Returns maximum voltage  
Returns minimum voltage  
40  
 
Language Dictionary - 4  
Table 4-1. Subsystem Commands Syntax (continued)  
OUTPut  
[:STATe] <bool> [,NORelay]  
:DFI  
Enables/disables the dc source output  
[:STATe] <bool>  
Enable/disable DFI output  
:SOURce <source>  
Selects event source (QUES | OPER | ESB | RQS | OFF)  
:PON  
:STATe <state>  
Set power-on state (*RST | RCL0)  
:PROTection  
:CLEar  
Reset latched protection  
:DELay <n>  
:RELay  
[:STATe] <bool>  
Delay after programming/before protection  
Opens/closes the external relay contacts  
:POLarity <polarity>  
Sets the external relay polarity (NORM | REV)  
:RI  
:MODE <mode>  
Sets remote inhibit input (LATC | LIVE | OFF)  
SENSe  
:CURRent  
[:DC]  
RANGe [:UPPer] <n>  
Selects the high current measurement range  
:DETector <detector>  
:FUNCtion <function>  
:SWEep  
Selects the current measurement detector (ACDC | DC)  
Configures the measurement sensor ("VOLT" | "CURR")  
:OFFSet  
:POINts <n>  
Defines the offset in the data sweep  
:POINts <n>  
Define the number of data points in a sweep  
Sets the digitizer sample spacing  
Sets the measurement window function (HANN | RECT)  
:TINTerval <n>  
:WINDow [:TYPE] <type>  
[SOURce:]  
CURRent  
[:LEVel]  
[:IMMediate][:AMPLitude] <n>  
:TRIGgered [:AMPLitude] <n>  
:PROTection  
:STATe <bool>  
Sets the output current level  
Sets the triggered output current level  
Enable/Disable current limit protection  
DIGital  
:DATA [:VALue] <n>  
:FUNCtion <function>  
Sets and reads the digital control port  
Configures digital control port (RIDF | DIG)  
VOLTage  
[:LEVel]  
[:IMMediate][:AMPLitude] <n>  
:TRIGgered [:AMPLitude] <n>  
:ALC  
Sets the dc voltage level  
Sets the transient voltage level  
:BANDwidth? | :BWIDth?  
:PROTection [:LEVel] <n>  
Returns setting of output mode switch  
Sets the overvoltage protection threshold  
41  
 
4 - Language Dictionary  
Table 4-1. Subsystem Commands Syntax (continued)  
Presets all enable and transition registers to power-on  
STATus  
:PRESet  
:OPERation  
[:EVENt]?  
Returns the value of the event register  
Returns the value of the condition register  
Enables specific bits in the Event register  
Sets the Negative transition filter  
:CONDition?  
:ENABle <n>  
:NTRansition<n>  
:PTRansition<n>  
:QUEStionable  
[:EVENt]?  
Sets the Positive transition filter  
Returns the value of the event register  
Returns the value of the condition register  
Enables specific bits in the Event register  
Sets the Negative transition filter  
:CONDition?  
:ENABle <n>  
:NTRansition<n>  
:PTRansition<n>  
SYSTem  
Sets the Positive transition filter  
:ERRor?  
:LANGuage <language>  
:VERSion?  
Returns the error number and error string  
Sets the programming language (SCPI | COMP)  
Returns the SCPI version number  
:LOCal  
:REMote  
:RWLock  
Go to local mode (for RS-232 operation)  
Go to remote mode (for RS-232 operation)  
Go to remote with local lockout (for RS-232 operation)  
TRIGger  
:SEQuence2 | :ACQuire  
[:IMMediate]  
Triggers the measurement immediately  
:COUNt  
:CURRent <n>  
:VOLTage <n>  
:HYSTeresis  
:CURRent <n>  
:VOLTage <n>  
:LEVel  
Sets the number of sweeps per current measurement  
Sets the number of sweeps per voltage measurement  
Qualifies the trigger when measuring current  
Qualifies the trigger when measuring voltage  
:CURRent <n>  
:VOLTage <n>  
:SLOPe  
Sets the trigger level for measuring current  
Sets the trigger level for measuring voltage  
:CURRent <slope>  
:VOLTage <slope>  
:SOURce <source>  
[:SEQuence1 | :TRANsient]  
[:IMMediate]  
:SOURce <source>  
:SEQuence1  
:DEFine TRANsient  
:SEQuence2  
:DEFine ACQuire  
Sets the triggered current slope (POS | NEG | EITH)  
Sets the triggered voltage slope (POS | NEG | EITH)  
Sets the trigger source (BUS | INT)  
Triggers the output immediately  
Sets the trigger source (BUS)  
Sets or queries the SEQ1 name  
Sets or queries the SEQ2 name  
42  
 
Language Dictionary - 4  
Common Commands  
Common commands begin with an * and consist of three letters (command) or three letters and a ?  
(query). They are defined by the IEEE 488.2 standard to perform common interface functions. Common  
commands and queries are categorized under System, Status, or Trigger functions and are listed at the  
end of each group. The dc source responds to the following commands:  
Table 4-2. Common Commands Syntax  
*CLS  
Clear status  
*ESE <n>  
* ESE?  
*ESR?  
*IDN?  
Standard event status enable  
Return standard event status enable  
Return event status register  
Return instrument identification  
Enable "operation complete" bit in ESR  
Return a "1" when operation complete  
Return option number  
Power-on status clear state set/reset  
Return power-on status clear state  
Recall instrument state  
*OPC  
*OPC?  
*OPT?  
*PSC <bool>  
*PSC?  
*RCL <n>  
*RST  
Reset  
*SAV <n>  
*SRE <n>  
*SRE?  
*STB?  
Save instrument state  
Set service request enable register  
Return service request enable register  
Return status byte  
*TRG  
Trigger  
*TST?  
*WAI  
Perform selftest, then return result  
Hold off bus until all device commands done  
Programming Parameters  
The following table lists the output programming parameters for each model.  
Table 4-3. Output Programming Parameters  
Parameter  
Value  
6632B  
66312A 66312A  
6631B  
6611C  
10.237  
5.1188  
6633B  
6613C  
2.0475  
1.0238  
6634B  
6614C  
1.0238  
0.5118  
6612C  
5.1188  
2.0475  
[SOUR:]CURR[:LEV][:IMM] MAX  
and  
[SOUR:]CURR[:LEV]:TRIG MAX  
*RST Current Value  
[SOUR:]VOLT[:LEV][:IMM]MAX  
and  
[SOUR:]VOLT[:LEV]:TRIG MAX  
*RST Voltage Value  
2.0475  
20.475  
22  
5.1188  
10% of MAX value for all models  
20.475  
8.190  
20.475  
51.188  
102.38  
110  
0 V for all models  
12 22  
MAX for all models  
[SOUR:]VOLT:PROT[:LEV] MAX  
*RST OVP Value  
22  
55  
OUTP:PROT:DEL MAX  
*RST Protection Delay Value  
SENS:CURR:RANG  
2,147,483.647 seconds for all models  
0.08 seconds  
Low range = 0 20 mA for all models  
High Range = 20 mA MAX for all models  
Value MAX for all models  
*RST Current Range  
43  
 
4 - Language Dictionary  
Calibration Commands  
Calibration commands let you:  
u Enable and disable the calibration mode  
u Change the calibration password  
u Calibrate the current and voltage programming and measurement, and store new calibration  
constants in nonvolatile memory.  
NOTE:  
If calibration mode has not been enabled with CALibrate:STATe, programming the  
calibration commands will generate an error.  
CALibrate:CURRent  
This command initiates the calibration of the positive dc output current as well as the high-range current  
measurement circuit.  
CALibrate:CURRent[:SOURce][:DC][:POSitive]  
None  
CAL:CURRCAL:CURR:SOUR:DC:POS  
Command Syntax  
Parameters  
Examples  
CAL:CURR:NEG  
Related Commands  
CALibrate:CURRent:NEGative  
This command initiates the calibration of the negative dc output current.  
CALibrate:CURRent[:SOURce][:DC]:NEGative  
None  
CAL:CURR:NEGCAL:CURR:SOUR:DC:NEG  
Command Syntax  
Parameters  
Examples  
CAL:CURR  
Related Commands  
CALibrate:CURRent:MEASure:LOWRange  
This command initiates the calibration of the low-range current measurement circuit.  
CALibrate:CURRent:MEASure[:DC]:LOWRange  
None  
CAL:CURR:MEAS  
Command Syntax  
Parameters  
Examples  
CAL:CURR  
Related Commands  
CALibrate:CURRent:MEASure:AC  
Agilent 66312A, 66332A Only  
This command initiates the calibration of the high bandwidth (ac) measurement circuit.  
CALibrate:CURRent:MEASure:AC  
None  
CAL:CURR:MEAS:AC  
Command Syntax  
Parameters  
Examples  
44  
 
Language Dictionary - 4  
CALibrate:DATA  
This command enters a calibration value that you obtain by reading an external meter. You must first  
select a calibration level (with CALibrate:LEVel) for the value being entered.  
CALibrate:DATA<NRf>  
<external reading>  
A (amperes)  
Command Syntax  
Parameters  
Unit  
Examples  
CAL:DATA 3222.3 MA  
CAL:DATA 5.000  
CAL:STAT CAL:LEV  
Related Commands  
CALibrate:LEVel  
This command selects the next point in the calibration sequence.  
P1: the first calibration point  
P2: the second calibration point  
CALibrate:LEVel <point>  
P1 | P2  
CAL:LEV P2  
Command Syntax  
Parameters  
Examples  
CALibrate:PASSword  
This command lets you change the calibration password. A new password is automatically stored in  
nonvolatile memory and does not have to be stored with CALibrate:SAVE.  
If the password is set to 0, password protection is removed and the ability to enter the calibration mode is  
unrestricted.  
CALibrate:PASScode<NRf>  
<model number> (default)  
Command Syntax  
Parameters  
CAL:PASS 6812  
CAL:PASS 6.1994  
Examples  
CAL:SAV  
Related Commands  
CALibrate:SAVE  
This command saves any new calibration constants after a calibration procedure has been completed in  
nonvolatile memory. If CALibrate:STATe OFF is programmed without a CALibrate:SAVE, the previous  
calibration constants are restored..  
CALibrate:SAVE  
None  
CAL:SAVE  
Command Syntax  
Parameters  
Examples  
CAL:PASS  
CAL:STAT  
Related Commands  
45  
 
4 - Language Dictionary  
CALibrate:STATe  
This command enables and disables calibration mode. The calibration mode must be enabled before the  
will accept any other calibration commands.  
The first parameter specifies the enabled or disabled state. The second parameter is the password. It is  
required if the calibration mode is being enabled and the existing password is not 0. If the password is not  
entered or is incorrect, an error is generated and the calibration mode remains disabled. The query  
statement returns only the state, not the password.  
NOTE:  
Whenever the calibration state is changed from enabled to disabled, any new calibration  
constants are lost unless they have been stored with CALibrate:SAVE.  
CALibrate:STATe<bool>[,<NRf>]  
0 | 1 | OFF | ON [,<password>]  
OFF  
Command Syntax  
Parameters  
*RST Value  
Examples  
CAL:STAT 1,6812 CAL:STAT OFF  
CALibrate:STATe?  
<NR1>  
CAL:PASS CAL:SAVE *RST  
Query Syntax  
Returned Parameters  
Related Commands  
CALibrate:VOLTage  
This command initiates the calibration of the output voltage and the voltage readback circuit.  
CALibrate:VOLTage[:DC]  
None  
Command Syntax  
Parameters  
CAL:VOLT  
CAL:VOLT:DC  
Examples  
CALibrate:VOLTage:PROTection  
This command can calibrates the overvoltage protection (OV) circuit. The dc source automatically  
performs the calibration. CALibrate:VOLTage:PROTection is a sequential command that takes several  
seconds to complete.  
CALibrate:VOLTage:PROTection  
None  
CAL:VOLT:PROT  
Command Syntax  
Parameters  
Examples  
46  
 
Language Dictionary - 4  
Measurement Commands  
Measurement commands consist of measure and sense commands.  
Measure commands measure the output voltage or current. Measurements are performed by digitizing  
the instantaneous output voltage or current for a defined number of samples and sample interval, storing  
the results in a buffer, and calculating the measured result. Two types of measurement commands are  
available: MEASure and FETCh. MEASure triggers the acquisition of new data before returning the  
reading; FETCh returns a reading computed from previously acquired data. If you take a voltage  
measurement, you can fetch only voltage data.  
Use MEASure when the measurement does not need to be synchronized with any other event.  
Use FETCh when it is important that the measurement be synchronized with either a trigger or  
with a particular part of the output waveform.  
Sense commands control the current measurement range, the bandwidth detector of the , and the data  
acquisition sequence.  
MEASure:ARRay:CURRent?  
FETCh:ARRay:CURRent?  
Agilent 66312A, 66332A Only  
These queries return an array containing the instantaneous output current in amperes. The output voltage  
or output current are digitized whenever a measure command is given or whenever an acquire trigger  
occurs. The time interval is set by SENSe:SWEep:TINTerval. The position of the trigger relative to the  
beginning of the data buffer is determined by SENSe:SWEep:OFFSet. The number of points returned is  
set by SENSe:SWEep:POINts.  
MEASure:ARRay:CURRent[:DC]?  
FETCh:ARRay:CURRent[:DC]?  
None  
Query Syntax  
Parameters  
Examples  
MEAS:ARR:CURR?  
FETC:ARR:CURR?  
<NR3>  
Returned Parameters  
Related Commands  
SENS:SWE:TINT SENS:SWE:OFFS SENS:SWE:POIN  
MEASure:ARRay:VOLTage?  
FETCh:ARRay:VOLTage?  
Agilent 66312A, 66332A Only  
These queries return an array containing the instantaneous output voltage in volts. The output voltage or  
output current are digitized whenever a measure command is given or whenever an acquire trigger  
occurs. The time interval is set by SENSe:SWEep:TINTerval. The position of the trigger relative to the  
beginning of the data buffer is determined by SENSe:SWEep:OFFSet. The number of points returned is  
set by SENSe:SWEep:POINts.  
MEASure:ARRay:VOLTage[:DC]?  
FETCh:ARRay:VOLTage[:DC]?  
None  
Query Syntax  
Parameters  
Examples  
MEAS:ARR:VOLT?  
FETC:ARR:VOLT?  
<NR3>  
SENS:SWE:TINT  
Returned Parameters  
Related Commands  
SENS:SWE:OFFS SENS:SWE:POIN  
47  
 
4 - Language Dictionary  
MEASure:CURRent?  
FETCh:CURRent?  
FETCh:CURRent? applies to Agilent 66312A, 66332A Only  
These queries return the dc output current.  
MEASure:[SCALar]:CURRent[:DC]?  
FETCh:[SCALar]:CURRent[:DC]?  
None  
Query Syntax  
Parameters  
Examples  
MEAS:CURR? MEAS:CURR:DC?  
<NR3>  
MEAS:VOLT?  
Returned Parameters  
Related Commands  
MEASure:CURRent:ACDC?  
FETCh:CURRent:ACDC?  
Agilent 66312A, 66332A Only  
These queries return the ac+dc rms output current.  
MEASure:[SCALar]:CURRent:ACDC?  
Query Syntax  
FETCh:[SCALar]:CURRent:ACDC?  
None  
Parameters  
Examples  
MEAS:CURR:ACDC?  
FETC:CURR:ACDC?  
<NR3>  
MEAS:VOLT:ACDC?  
Returned Parameters  
Related Commands  
MEASure:CURRent:HIGH?  
FETCh:CURRent:HIGH?  
Agilent 66312A, 66332A Only  
These queries return the High level current of a current pulse waveform. The instrument first measures  
the minimum and maximum data points of the pulse waveform. It then generates a histogram of the pulse  
waveform using 1024 bins between the maximum and minimum data points. The bin containing the most  
data points above the 50% point is the high bin. The average of all the data points in the high bin is  
returned as the High level. If no high bin contains more than 1.25% of the total number of acquired points,  
then the maximum value is returned by these queries.  
MEASure[SCALar]:CURRent:HIGH?  
FETCh[:SCALar]:CURRent:HIGH?  
None  
Query Syntax  
Parameters  
Examples  
MEAS:CURR:HIGH?FETC:CURR:HIGH?  
<NR3>  
Returned Parameters  
Related Commands  
MEAS:CURR:LOW? CALC:REF:HIGH  
48  
 
Language Dictionary - 4  
MEASure:CURRent:LOW?  
FETCh:CURRent:LOW?  
Agilent 66312A, 66332A Only  
These queries return the Low level current of a current pulse waveform. The instrument first measures the  
minimum and maximum data points of the pulse waveform. It then generates a histogram of the pulse  
waveform using 1024 bins between the maximum and minimum data points. The bin containing the most  
data points below the 50% point is the low bin. The average of all the data points in the low bin is returned  
as the Low level. If no low bin contains more than 1.25% of the total number of acquired points, then the  
minimum value is returned by these queries.  
MEASure[SCALar]:CURRent:LOW?  
FETCh[:SCALar]:CURRent:LOW?  
None  
Query Syntax  
Parameters  
Examples  
MEAS:CURR:LOW?  
FETC:CURR:LOW?  
<NR3>  
Returned Parameters  
Related Commands  
MEAS:CURR:HIGH? CALC:REF:LOW  
MEASure:CURRent:MAXimum?  
FETCh:CURRent: MAXimum?  
Agilent 66312A, 66332A Only  
These queries return the maximum output current reading from the measurement sample.  
MEASure[:SCALar]:CURRent:MAXimum?  
FETCh[:SCALar]:CURRent:MAXimum?  
None  
Query Syntax  
Parameters  
Examples  
MEAS:CURR:MAX?  
FETC:CURR:MAX?  
<NR3>  
MEAS:CURR:MIN?  
Returned Parameters  
Related Commands  
MEASure:CURRent:MINimum?  
FETCh:CURRent:MINimum?  
Agilent 66312A, 66332A Only  
These queries return the minimum output current reading from the measurement sample.  
MEASure[:SCALar]:CURRent:MINimum?  
FETCh[:SCALar]:CURRent:MINimum?  
None  
Query Syntax  
Parameters  
Examples  
MEAS:CURR:MIN?  
FETC:CURR:MIN?  
<NR3>  
MEAS:CURR:MAX?  
Returned Parameters  
Related Commands  
49  
 
4 - Language Dictionary  
MEASure:VOLTage?  
FETCh:VOLTage?  
FETCh:VOLTage? applies to Agilent 66312A, 66332A Only  
These queries return the dc output voltage.  
MEASure[:SCALar]:VOLTage[:DC]?  
MEASure[:SCALar]:VOLTage[:DC]?  
None  
Query Syntax  
Parameters  
Examples  
MEAS:VOLT?  
FETC:VOLT:DC?  
<NR3>  
MEAS:CURR?  
Returned Parameters  
Related Commands  
MEASure:VOLTage:ACDC?  
FETCh:VOLTage:ACDC?  
Agilent 66312A, 66332A Only  
These queries return the ac+dc rms output voltage.  
MEASure[:SCALar]:VOLTage:ACDC?  
FETCh[:SCALar]:VOLTage:ACDC?  
None  
Query Syntax  
Parameters  
Examples  
MEAS:VOLT:ACDC?  
FETC:VOLT:ACDC?  
<NR3>  
MEAS:CURR:ACDC?  
Returned Parameters  
Related Commands  
MEASure:VOLTage:HIGH?  
FETCh:VOLTage:HIGH?  
Agilent 66312A, 66332A Only  
These queries return the High level voltage of a voltage pulse waveform. The instrument first measures  
the minimum and maximum data points of the pulse waveform. It then generates a histogram of the pulse  
waveform using 1024 bins between the maximum and minimum data points. The bin containing the most  
data points above the 50% point is the high bin. The average of all the data points in the high bin is  
returned as the High level. If no high bin contains more than 1.25% of the total number of acquired points,  
then the maximum value is returned by these queries.  
MEASure[SCALar]:VOLTage:HIGH?  
FETCh[:SCALar]:VOLTage:HIGH?  
None  
Query Syntax  
Parameters  
Examples  
MEAS:VOLT:HIGH?  
FETC:VOLT:HIGH?  
<NR3>  
Returned Parameters  
Related Commands  
MEAS:VOLT:LOW? CALC:REF:HIGH  
50  
 
Language Dictionary - 4  
MEASure:VOLTage:LOW?  
FETCh:VOLTage:LOW?  
Agilent 66312A, 66332A Only  
These queries return the Low level voltage of a voltage pulse waveform. The instrument first measures  
the minimum and maximum data points of the pulse waveform. It then generates a histogram of the pulse  
waveform using 1024 bins between the maximum and minimum data points. The bin containing the most  
data points below the 50% point is the low bin. The average of all the data points in the low bin is returned  
as the Low level. If no low bin contains more than 1.25% of the total number of acquired points, then the  
minimum value is returned by these queries.  
MEASure[SCALar]:VOLTage:LOW?  
FETCh[:SCALar]:VOLTage:LOW?  
None  
Query Syntax  
Parameters  
Examples  
MEAS:VOLT:LOW?  
FETC:VOLT:LOW?  
<NR3>  
Returned Parameters  
Related Commands  
MEAS:VOLT:HIGH? CALC:REF:LOW  
MEASure:VOLTage:MAXimum?  
FETCh:VOLTage:MAXimum?  
Agilent 66312A, 66332A Only  
These queries return the maximum output voltage reading from the measurement sample.  
MEASure[:SCALar]:VOLTage:MAXimum?  
FETCh[:SCALar]:VOLTage:MAXimum?  
None  
Query Syntax  
Parameters  
Examples  
MEAS:VOLT:MAX?  
FETC:VOLT:MAX?  
<NR3>  
MEAS:VOLT:MIN?  
Returned Parameters  
Related Commands  
MEASure:VOLTage:MINimum?  
FETCh:VOLTage:MINimum?  
Agilent 66312A, 66332A Only  
These queries return the minimum output voltage reading from the measurement sample.  
MEASure[:SCALar]:VOLTage:MINimum?  
FETCh[:SCALar]:VOLTage:MINimum?  
None  
Query Syntax  
Parameters  
Examples  
MEAS:VOLT:MIN?  
FETC:VOLT:MIN?  
<NR3>  
MEAS:VOLT:MAX?  
Returned Parameters  
Related Commands  
51  
 
4 - Language Dictionary  
SENSe:CURRent:RANGe  
This command selects the dc current measurement range. All models have two current measurement  
ranges:  
High Range: 0 through MAX (see Table 4-3)  
Low Range: 0 through 0.02 A (all models)  
The High range covers the full current measurement capability of the instrument. The Low range  
measures currents up to a maximum of 20 mA. This increases the low current measurement sensitivity for  
greater accuracy and resolution. The value that you program with SENSe:CURRent:RANGe must be the  
maximum current that you expect to measure. The instrument will select the range that gives the best  
resolution. The crossover value is 20 mA. When queried, the returned value is the maximum current that  
can be measured on the range that is presently set.  
SENSe:CURRent[:DC]:RANGe[:UPPer]<NRf+>  
0 through MAX (see table 4-3)  
A (amperes)  
Command Syntax  
Parameters  
Unit  
MAX (high range)  
SENS:CURR:RANG 4.0  
*RST Value  
Examples  
SENSe:CURRent:RANGe?  
<NR3>  
Query Syntax  
Returned Parameters  
SENSe:CURRent:DETector  
Agilent 66312A, 66332A Only  
This command lets you select the type of detector used for output current measuremants. Two choices for  
detecting current measurements are available:  
This is the preferred choice for all dynamic current measurements. When ACDC is selected,  
the measured output current includes the current that flows in the instrument’s output  
capacitor. It is especially important to use ACDC detection when measuring pulse or other  
waveforms with frequency contents greater than several kilohertz.  
ACDC  
Select DC only if you are making dc current measurements and you require a dc measurement  
offset accuracy better than 2mA on the High current measurement range. When DC is  
selected, the component of output current that is supplied by the instrument’s output filter is not  
sensed. Note that this selections gives inaccurate results on current waveforms with frequency  
contents greater than several kilohertz.  
DC  
NOTE:  
This command only applies to the High current measurement range.  
SENSe:CURRent:DETector<detector>  
ACDC or DC  
ACDC  
Command Syntax  
Parameters  
*RST Value  
SENS:CURR:DET ACDC  
SENSe:CURRent:DETect?  
<CRD>  
SENS:CURR:DET DC  
Examples  
Query Syntax  
Returned Parameters  
52  
 
Language Dictionary - 4  
SENSe:FUNCtion  
Agilent 66312A, 66332A Only  
This command configures the measurement sensor to measure either voltage or current when an acquire  
trigger is used. The query returns the function setting, either VOLT or CURR.  
SENSe:FUNCtion <function  
"VOLTage" | "CURRent"  
SENS:FUNC "VOLT"  
Command Syntax  
Parameters  
Examples  
SENSe:FUNCtion?  
<SRD>  
Query Syntax  
Returned Parameters  
SENSe:SWEep:OFFSet:POINts  
Agilent 66312A, 66332A Only  
This command defines the offset in a data sweep when an acquire trigger is used. Negative values  
represent data samples taken prior to the trigger.  
SENSe:SWEep:OFFSet:POINts <NRf+>  
-4095 through 2,000,000,000  
0
Command Syntax  
Parameters  
*RST Value  
Examples  
SENS:SWE:OFFS:POIN -2047  
SENSe:SWEep:OFFSet:POINts?  
<NR3>  
SENS:SWE:TINT SENS:SWE:POIN MEAS:ARR  
Query Syntax  
Returned Parameters  
Related Commands  
SENSe:SWEep:POINts  
This command defines the number of points in a data sweep.  
SENSe:SWEep:POINts<NRf+>  
0 through 4096  
Command Syntax  
Parameters  
2048  
*RST Value  
SENS:SWE:POIN 1024  
Examples  
SENSe:SWEep:POINts?  
<NR3>  
Query Syntax  
Returned Parameters  
Related Commands  
SENS:SWE:TINT  
SENS:SWE:OFFS  
MEAS:ARR  
SENSe:SWEep:TINTerval  
This command defines the time period between samples  
SENSe:SWEep:TINTerval<NRf+>  
Command Syntax  
Parameters  
15.6 microseconds through 31200 seconds  
15.6 microseconds  
SENS:SWE:TINT 31.2E-6  
*RST Value  
Examples  
SENSe:SWEep:TINTerval?  
<NR3>  
SENS:SWE:POIN SENS:SWE:OFFS  
Query Syntax  
Returned Parameters  
Related Commands  
MEAS:ARR  
53  
 
4 - Language Dictionary  
SENSe:WINDow  
This command sets the window function that is used in output measurement calculations. The following  
functions can be selected:  
A signal conditioning window that reduces errors in dc and rms measurement  
calculations in the presence of periodic signals such as line ripple. It also  
reduces jitter when measuring successive pulse waveforms. The Hanning  
window multiplies each point in the measurement sample by the function cos4.  
Do not use the Hanning window when measuring single-shot pulse waveforms.  
HANNing  
RECTangular  
NOTE:  
A window that returns measurement calculations without any signal  
conditioning. This window may be used for pulse measurements where the  
exact period of the pulse waveform is known and the measurement interval can  
be set accordingly using the SENSe:SWEep:TINTerval command.  
Neither window function alters the instantaneous voltage or current data returned in the  
measurement array.  
SENSe:WINDow[:TYPE] <type>  
HANNing | RECTangular  
HANNing  
Command Syntax  
Parameters  
*RST Value  
Examples  
SENS:WIND RECT  
SENSe:WINDow[:TYPE]?  
<CRD>  
Query Syntax  
Returned Parameters  
54  
 
Language Dictionary - 4  
Output Commands  
Output commands consist of output and source commands.  
Output commands control the output and digital port functions. They also control the output relay on  
units with Relay Option 760.  
Source commands program the actual voltage, current, and digital port output.  
OUTPut  
This command enables or disables the dc source output. The state of a disabled output is a condition of  
zero output voltage and a model-dependent minimum source current (see *RST). Unless the NORelay  
command is programmed, the OUTput command also controls the output relay on Agilent models  
66332A, 6631B, 6632B, 6633B, and 6634B with Relay Option 760. If the NORelay command is sent, the  
output relay state does NOT change.  
OUTPut[:STATe] <bool> [,NORelay]  
0 | OFF | 1 | ON  
Command Syntax  
Parameters  
0
*RST Value  
Examples  
OUTP 1OUTPUT:STATE ON  
OUTPut[:STATe]?  
<NR1>0 or 1  
Query Syntax  
Returned Parameters  
Related Commands  
*RST  
*RCL *SAV  
OUTPut:DFI  
This command enables or disables the discrete fault indicator (DFI) outputfrom the dc source.  
OUTPut:DFI[:STATe]<bool>  
0 | 1 | OFF | ON  
OFF  
Command Syntax  
Parameters  
*RST Value  
OUTP:DFI 1  
OUTPut:DFI[:STATe]?  
0 | 1  
OUTP:DFI ON  
Examples  
Query Syntax  
Returned Parameters  
Related Commands  
OUTP:DFI:SOUR  
OUTPut:DFI:SOURce  
This command selects the source for discrete fault indicator (DFI) events.The choices are:  
selects the Questionable event summary bit (bit 3 of the Status Byte Register)  
selects the Operation Event summary bit (bit 7 of the Status Byte Register)  
selects the Standard Event summary bit (bit 5 of the Status Byte Register)  
selects the Request Service bit (bit 6 of the Status Byte Register)  
selects no DFI source  
QUEStionable  
OPERation  
ESB  
RQS  
OFF  
OUTP:DFI:SOUR<source>  
QUES | OPER | ESB | RQS | OFF  
OFF  
Command Syntax  
Parameters  
*RST Value  
Examples  
OUTP:DFI:SOUR OPER  
OUTPut:DFI:SOUR?  
<CRD>  
OUTP:DFI  
Query Syntax  
Returned Parameters  
Related Commands  
55  
 
4 - Language Dictionary  
OUTPut:PON:STATe  
This command selects the power-on state of the dc source. This information is saved in non-volatile  
memory. The following states can be selected:  
Sets the power-on state to *RST. Refer to the *RST command as described in this chapter  
for more information.  
RST  
Sets the power-on state to *RCL 0. Refer to the *RCL command as described in this  
chapter for more information.  
RCL0  
OUTPut:PON:STATe <state>  
RST | RCL0  
OUTP:PON:STAT RST  
Command Syntax  
Parameters  
Examples  
OUTPut:PON:STATe?  
<CRD>  
*RST *RCL  
Query Syntax  
Returned Parameters  
Related Commands  
OUTPut:PROTection:CLEar  
This command clears the latch that disables the output when an OverVoltage, OverCurrent,  
OverTemperature, Remote Inhibit, or Fuse Status condition is detected. All conditions that generate the  
fault must be removed before the latch can be cleared. The output is then restored to the state it was in  
before the fault condition occurred.  
OUTPut:PROTection:CLEar  
None  
OUTP:PROT:CLE  
Command Syntax  
Parameters  
Examples  
OUTP:PROT:DEL *RCL *SAV  
Related Commands  
OUTPut:PROTection:DELay  
This command sets the time between the programming of an output change that produces a constant  
current condition (CC) and the recording of that condition by the Operation Status Condition register. The  
delay prevents the momentary changes in status that can occur during reprogramming from being  
registered as events by the status subsystem. Since the constant current condition is used to trigger  
overcurrent protection (OCP), this command also delays OCP. Overvoltage protection is not affected by  
this comand.  
OUTPut:PROTection:DELay <NRf+>  
0 to 2,147,483.647  
Command Syntax  
Parameters  
seconds  
Unit  
0.08 (Normal)  
*RST Value  
OUTPUT:PROTECTION:DELAY 75E-1  
Examples  
OUTPut:PROTection:DELay?  
<NR3>  
OUTP:PROT:CLE *RCL *SAV  
Query Syntax  
Returned Parameters  
Related Commands  
56  
 
Language Dictionary - 4  
OUTPut:RELay  
Agilent 66332A, 6632B, 6633B, 6634B, 6611C, 6612C, 6613C, 6614C Only  
This command is only valid for units with Relay Option 760, otherwise an error will occur. Programming  
ON closes the output relay contacts; programming OFF opens them. The relay is controlled independently  
of the output state. If the dc source is supplying power to a load, that power will appear at the relay  
contacts during switching.  
OUTPut:RELay[:STATe]<bool>  
0 | 1 | OFF ON  
Command Syntax  
Parameters  
0
*RST Value  
Examples  
OUTP:REL 1OUTP:REL OFF  
OUTPput:RELay?  
0 | 1  
OUTP *RCL *SAV  
Query Syntax  
Returned Parameters  
Related Commands  
OUTPut:RELay:POLarity  
Agilent 66332A, 6632B, 6633B, 6634B, 6611C, 6612C, 6613C, 6614C Only  
This command is only valid for units with Relay Option 760, otherwise an error will occur. Programming  
NORMal causes the output relay polarity to be the same as the dc source output. Programming REVerse  
causes the relay output polarity to be opposite to that of the dc source output. If OUTPut = ON when either  
command is sent, the output voltage is set to 0 during the time that the relays are changing polarity.  
OUTPut:RELay:POLarity<CRD>  
NORMal | REVerse  
NORM  
Command Syntax  
Parameters  
*RST Value  
Examples  
OUTP:REL:POL NORM  
OUTPput:RELay:POLarity?  
NORM | REV  
OUTP *RCL *SAV  
Query Syntax  
Returned Parameters  
Related Commands  
OUTPut:RI:MODE  
This command selects the mode of operation of the Remote Inhibit protection. The RI mode is stored in  
non-volatile memory. The following modes can be selected:  
causes a TTL low signal on the INH input to disable the output. The only way  
to clear the latch is by sending an OUTPut:PROTection:CLEAR command  
while the INH input is false.  
LATChing  
allows the INH input to disable the output in a non-latching manner. In other  
words, the output follows the state of the INH input. When INH is low true, the  
output is disabled. When INH is high the output is not affected.  
the INH input is disabled.  
LIVE  
OFF  
OUTPut:RI:MODE <mode>  
LATChing | LIVE | OFF  
OUTP:RI:MODE LIVE  
Command Syntax  
Parameters  
Examples  
OUTPut:RI:MODE?  
<CRD>  
OUTP:PROT:CLE  
Query Syntax  
Returned Parameters  
Related Commands  
57  
 
4 - Language Dictionary  
[SOURce:]CURRent  
This command sets the immediate current level of the dc source . The immediate level is the current  
programmed for the output terminals.  
[SOURce]:CURRent[:LEVel][:IMMediate][:AMPLitude]<NRf+>  
Command Syntax  
Parameters  
see Table 4-3  
A (amperes)  
10% of MAX  
Default Suffix  
*RST Value  
Examples  
CURR 200 MA  
CURRENT:LEVEL 200 MA  
[SOURce]:CURRent[:LEVel][:IMMediate][:AMPLitude]?  
Query Syntax  
<NR3>  
CURR:TRIG  
Returned Parameters  
Related Commands  
[SOURce:]CURRent:TRIGger  
This command sets the pending triggered current level of the dc source . The pending triggered level is a  
stored current value that is transferred to the output terminals when a trigger occurs. In order for a trigger  
to occur, the trigger subsystem must be initiated (see the INITiate command in the trigger subsystem).  
[SOURce]:CURRent[:LEVel]:TRIGgered[:AMPLitude]<NRf+>  
see Table 4-3  
Command Syntax  
Parameters  
A ( amperes)  
Default Suffix  
10% of MAX  
*RST Value  
CURR:TRIG 1CURRENT:LEVEL:TRIGGERED 1  
Examples  
SOURce]:CURRent[LEVel]:TRIGgered[:AMPLitude]?  
Query Syntax  
<NR3>  
INIT CURR  
Returned Parameters  
Related Commands  
[SOURce:]CURRent:PROTection:STATe  
This command enables or disables the overcurrent protection (OCP) function. If the dc source overcurrent  
protection function is enabled and the dc source goes into constant current operation, then the output is  
disabled and the Questionable Condition status register OC bit is set (see chapter 3 under Programming  
the Status Registers). Note that the [SOURce:]CURRent command sets the current limit, which  
determines when the dc source goes into constant current operation. An overcurrent condition can be  
cleared with the OUTPut:PROTection:CLEar command after the cause of the condition is removed.  
NOTE:  
Use OUTP:PROT:DEL to prevent momentary current limit conditions caused by  
programmed output changes from tripping the overcurrent protection.  
[SOURce]:CURRent:PROTection:STATe <bool>  
0 | 1 | OFF | ON  
OFF  
Command Syntax  
Parameters  
*RST Value  
CURR:PROT:STAT 0CURRENT:PROTECTION:STATE OFF  
CURR:PROT:STAT 1CURRENT:PROTECTION:STATE ON  
Examples  
Syntax [SOURce]:CURRent:PROTection:STATe?  
<NR1>0 or 1  
Query Syntax  
Returned Parameters  
Related Commands  
OUTP:PROT:CLE  
*RST  
58  
 
Language Dictionary - 4  
[SOURce:]DIGital:DATA  
This command sets and reads the dc source digital control port when that port is configured for Digital I/O  
operation. The port has three signal pins and a digital ground pin. Pins 1 and 2 are output pins controlled  
by bits 0 and 1. Pin 3 is controlled by bit 2, and can be programmed to serve either as an input or an  
output. It normally serves as an output. Bit 2 must be programmed high to use pin 3 as an input. Pin 4 is  
the digital ground. The query returns the last programmed value in bits 0 and 1 and the value read at pin 3  
in bit 2.  
Program  
Bit Configuration  
Pin Setting  
Value  
2
0
0
0
0
1
1
1
1
1
0
0
0
1
0
1
0
1
0
1
4
3
2
1
0
1
2
3
4
5
6
7
GND Output Lo  
GND Output Lo  
GND Output Hi  
GND Output Hi  
GND Intput Lo  
GND Intput Lo  
GND Intput Hi  
GND Intput Hi  
Lo  
Hi  
Lo  
Hi  
Lo  
Hi  
Lo  
Hi  
0
1
1
0
0
1
1
[SOURce]:DIGital:DATA[:VALue] <NRf>  
0 to 7  
Command Syntax  
Parameters  
0
*RST Value  
DIG:DATA 7  
Examples  
[SOURce]:DIGital:DATA?  
<NR1>  
DIG:FUNC  
Query Syntax  
Returned Parameters  
Related Commands  
[SOURce:]DIGital:FUNCtion  
This command configures the dc source digital control port. The configuration setting is saved in non-  
volatile memory.  
Configures the port for Remote Inhibit/Discrete Fault Interrupt operation  
Configures the port for Digital input/output operation (see DIG:DATA)  
RIDFi  
DIGio  
[SOURce]:DIGital:FUNCtion <CRD>  
RIDFi | DIGio  
DIG:FUNC DIG  
Command Syntax  
Parameters  
Examples  
[SOURce]:DIGital:FUNC?  
<CRD>  
DIG:DATA  
Query Syntax  
Returned Parameters  
Related Commands  
[SOURce:]VOLTage  
This command sets the output voltage level of the dc source.  
[SOURce]:VOLTage[:LEVel][:IMMediate][:AMPLitude]<NRf+>  
Command Syntax  
Parameters  
see Table 4-3  
V (volts)  
0
Default Suffix  
*RST Value  
Examples  
VOLT 2  
VOLTAGE:LEVEL 200 MV  
[SOURce]:VOLTage[:LEVel][:IMMediate][:AMPLitude]?  
Query Syntax  
<NR3>  
VOLT:TRIG  
Returned Parameters  
Related Commands  
59  
 
4 - Language Dictionary  
[SOURce:]VOLTage:ALC:BANDwidth?  
[SOURce:]VOLTage:ALC:BWIDth?  
Agilent 66332A, 6631B, 6632B, 6633B and 6634B Only  
These queries return the setting of the output mode switch. The output mode switch is used to connect or  
disconnect the the output capacitor located inside the unit. The returned value is 15,000 if the switch is set  
to Normal and 60,000 if the switch is set to Fast.  
[SOURce]:VOLTage:ALC:BANDwidth?  
[SOURce]:VOLTage:ALC:BWIDth?  
Query Syntax  
VOLT:ALC:BAND?  
VOLTAGE:ALC:BWIDth?  
Examples  
<NR3>  
Returned Parameters  
[SOURce:]VOLTage:TRIGger  
This command sets the pending triggered voltage level of the dc source. The pending triggered level is a  
stored voltage value that is transferred to the output terminals when a trigger occurs. In order for a trigger  
to occur, the trigger subsystem must be initiated (see the INITiate command in the trigger subsystem).  
[SOURce][:VOLTage[:LEVel]:TRIGgered[:AMPLitude]<NRf+>  
see Table 4-3  
Command Syntax  
Parameters  
V (volts)  
0
VOLT:TRIG 20  
Default Suffix  
*RST Value  
Examples  
VOLTAGE:LEVEL:TRIGGERED 20  
[SOURce]:VOLTage[LEVel]:TRIGgered[:AMPLitude]?  
Query Syntax  
<NR3>  
VOLT *RST  
Returned Parameters  
Related Commands  
[SOURce:]VOLTage:PROTection  
This command sets the overvoltage protection (OVP) level of the dc source. If the output voltage exceeds  
the OVP level, then the dc source output is disabled and the Questionable Condition status register OV bit  
is set (see chapter 3 under Programming the Status Registers). An overvoltage condition can be cleared  
with the OUTP:PROT:CLE command after the condition that caused the OVP trip is removed. The OVP  
always trips with zero delay and is unaffected by the OUTP:PROT:DEL command.  
[SOURce]:VOLTage:PROTection[:LEVel]<NRf+>  
Command Syntax  
Parameters  
see Table 4-3  
V (volts)  
MAX  
Default Suffix  
*RST Value  
Examples  
VOLT:PROT 21.5  
VOLT:PROT:LEV MAX  
[SOURce]:VOLTage:PROTection[:LEVel]?  
<NR3>  
Query Syntax  
Returned Parameters  
Related Commands  
OUTP:PROT:CLE  
OUTP:PROT:DEL  
60  
 
Language Dictionary - 4  
Status Commands  
Status commands program the dc source status registers. The dc source has three groups of status  
registers; Operation, Questionable, and Standard Event. The Standard Event group is programmed with  
Common commands as described later in this section. The Operation and Questionable status groups  
each consist of the Condition, Enable, and Event registers and the NTR and PTR filters. Chapter 3 under  
"Programming the Status Registers" explains how to read specific register bits and use the information  
they return.  
Common commands also perform status functions. The following common commands are discussed in  
this section:  
*CLS *ESE *SR? *OPC *PSC *SRE *STB *WAI.  
STATus:PRESet  
This command sets all defined bits in the Status Subsystem PTR registers and clears all bits in the  
subsytem NTR and Enable registers.  
STATus:PRESet  
None  
STAT:PRES STATUS:PRESET  
Command Syntax  
Parameters  
Examples  
Table 4-4. Bit Configuration of Operation Status Registers  
15–12  
not  
11  
CC-  
10  
CC+  
9
not  
8
CV  
7-6  
not  
5
4-1  
not  
0
CAL  
Bit Position  
Bit Name  
WTG  
used  
used  
used  
used  
2048  
1024  
256  
32  
1
Bit Weight  
CAL = The dc source is computing new calibration constants.  
WTG = The dc source is waiting for a trigger.  
CV = The dc source is operating in constant voltage mode.  
CC+ = The dc source is operating in constant current mode.  
CC = The dc source is operating in negative constant current mode.  
STATus:OPERation?  
This query returns the value of the Operation Event register. The Event register is a read-only register  
which holds (latches) all events that are passed by the Operation NTR and/or PTR filter. Reading the  
Operation Event register clears it.  
STATus:OPERtion[:EVENt]?  
None  
Query Syntax  
Parameters  
<NR1>(Register Value)  
STAT:OPER?  
Returned Parameters  
Examples  
STATUS:OPERATIONAL:EVENT?  
*CLS STAT:OPER:NTR STAT:OPER:PTR  
Related Commands  
STATus:OPERation:CONDition?  
This query returns the value of the Operation Condition register. That is a read-only register which holds  
the real-time (unlatched) operational status of the dc source .  
STATus:OPERation:CONDition?  
None  
Query Syntax  
Parameters  
STAT:OPER:COND? STATUS:OPERATION:CONDITION?  
Examples  
<NR1> (register value)  
Returned Parameters  
61  
 
4 - Language Dictionary  
STATus:OPERation:ENABle  
This command and its query set and read the value of the Operational Enable register. This register is a  
mask for enabling specific bits from the Operation Event register to set the operation summary bit (OPER)  
of the Status Byte register. This bit (bit 7) is the logical OR of all the Operatonal Event register bits that are  
enabled by the Status Operation Enable register.  
STATus:OPERation:ENABle<NRf>  
0 to 32727  
Command Syntax  
Parameters  
0
Preset Value  
Examples  
STAT:OPER:ENAB 1312STAT:OPER:ENAB 1  
STATUS:OPERATION:ENABLE?  
STATus:OPERation:ENABle?  
<NR1> (register value)  
STAT:OPER:EVEN  
Query Syntax  
Returned Parameters  
Related Commands  
STATus:OPERation:NTR  
STATus:OPERation:PTR  
These commands set or read the value of the Operation NTR (Negative-Transition) and PTR (Positive-  
Transistion) registers. These registers serve as polarity filters between the Operation Enable and  
Operation Event registers to cause the following actions:  
u When a bit in the Operation NTR register is set to 1, then a 1-to-0 transition of the corresponding  
bit in the Operation Condition register causes that bit in the Operation Event register to be set.  
u When a bit of the Operation PTR register is set to 1, then a 0-to-1 transition of the corresponding  
bit in the Operation Condition register causes that bit in the Operation Event register to be set.  
u If the same bits in both NTR and PTR registers are set to 1, then any transition of that bit at the  
Operation Condition register sets the corresponding bit in the Operation Event register.  
u If the same bits in both NTR and PTR registers are set to 0, then no transition of that bit at the  
Operation Condition register can set the corresponding bit in the Operation Event register.  
STATus:OPERtion:NTRansition<NRf>  
STATus:OPERtion:PTRansition<NRf>  
0 to 32727  
Command Syntax  
Parameters  
Preset Value  
NTR register = 0; PTR register = 32727  
STAT:OPER:NTR 32  
STAT:OPER:NTR?  
<NR1> (register value)  
STAT:OPER:ENAB  
STAT:OPER:PTR 1312  
STAT:OPER:PTR?  
Examples  
Query Syntax  
Returned Parameters  
Related Commands  
62  
 
Language Dictionary - 4  
Table 4-5. Bit Configuration of Questionable Status Registers  
Bit Position  
Bit Name  
15  
14  
13-11  
10  
9
8-5  
4
3
2
1
0
not  
used  
Meas  
Ovld  
not  
used  
Unreg  
RI  
not  
used  
OT  
not  
used  
FS  
OCP  
OV  
Bit Weight  
16384  
1024  
512  
16  
4
2
1
OV = overvoltage protection has tripped  
OCP = overcurrent protection has tripped  
FS = the fuse is blown  
OT = overtemperature protection has tripped  
RI = remote inhibit is active  
Unreg = output is unregulated  
Meas Ovld = measurement overload  
STATus:QUEStionable?  
This query returns the value of the Questionable Event register. The Event register is a read-only register  
which holds (latches) all events that are passed by the Questionable NTR and/or PTR filter. Reading the  
Questionable Event register clears it.  
STATus:QUEStionable[:EVENt]?  
None  
Query Syntax  
Parameters  
STAT:QUES?  
STATUS:QUESTIONABLE:EVENT?  
Examples  
<NR1> (register value)  
*CLS STAT:QUES:ENAB  
STAT:QUES:NTR STAT:QUES:PTR  
Returned Parameters  
Related Commands  
STATus:QUEStionable:CONDition?  
This query returns the value of the Questionable Condition register. That is a read-only register which  
holds the real-time (unlatched) questionable status of the dc source.  
STATus:QUEStionable:CONDition?  
None  
STAT:QUES:COND? STATUS:QUESTIONABLE:CONDITION?  
Query Syntax  
Parameters  
Examples  
<NR1> (register value)  
Returned Parameters  
STATus:QUEStionable:ENABle  
This command and its query set and read the value of the Questionable Enable register. This register is a  
mask for enabling specific bits from the Questionable Event register to set the questionable summary bit  
(QUES) of the Status Byte register. This bit (bit 3) is the logical OR of all the Questionable Event register  
bits that are enabled by the Questionable Status Enable register..  
STATus:QUEStionable:ENABle<NRf>  
0 to 32767  
0
Command Syntax  
Parameters  
Preset Value  
STAT:QUES:ENAB 20  
STATus:QUEStionable:ENABle?  
<NR1> (register value)  
STAT:QUES?  
STAT:QUES:ENAB 16  
Examples  
Query Syntax  
Returned Parameters  
Related Commands  
63  
 
4 - Language Dictionary  
STATus:QUEStionable:NTR  
STATus:QUEStionable:PTR  
These commands allow you to set or read the value of the Questionable NTR (Negative-Transition) and  
PTR (Positive-Transistion) registers. These registers serve as polarity filters between the Questionable  
Enable and Questionable Event registers to cause the following actions:  
u When a bit of the Questionable NTR register is set to 1, then a 1-to-0 transition of the  
corresponding bit of the Questionable Condition register causes that bit in the Questionable Event  
register to be set.  
u When a bit of the Questionable PTR register is set to 1, then a 0-to-1 transition of the  
corresponding bit in the Questionable Condition register causes that bit in the Questionable Event  
register to be set.  
u If the same bits in both NTR and PTR registers are set to 1, then any transition of that bit at the  
Questionable Condition register sets the corresponding bit in the Questionable Event register.  
u If the same bits in both NTR and PTR registers are set to 0, then no transition of that bit at the  
Questionable Condition register can set the corresponding bit in the Questionable Event register.  
STATus:QUEStionable:NTRansition<NRf>  
STATus:QUEStionable:PTRansition<NRf>  
0 to 32727  
Command Syntax  
Parameters  
Preset Value  
NTR register = 0; PTR register = 32727  
STAT:QUES:NTR 16  
STATUS:QUESTIONABLE:PTR 512  
Examples  
STAT:QUES:NTR?STAT:QUES:PTR?  
<NR1>(Register value)  
STAT:QUES:ENAB  
Query Syntax  
Returned Parameters  
Related Commands  
*CLS  
This command causes the following actions (see chapter 3 under Programming the Status Registers, for  
the descriptions of all registers):  
u Clears the following registers:  
Standard Event Status  
Operation Status Event  
Questionable Status Event  
Status Byte  
u Clears the Error Queue  
u If *CLS immediately follows a program message terminator (<NL>), then the output queue and the  
MAV bit are also cleared.  
Command Syntax *CLS  
Parameters None  
64  
 
Language Dictionary - 4  
*ESE  
This command programs the Standard Event Status Enable register bits. The programming determines  
which events of the Standard Event Status Event register (see *ESR?) are allowed to set the ESB (Event  
Summary Bit) of the Status Byte register. A "1" in the bit position enables the corresponding event. All of  
the enabled events of the Standard Event Status Event Register are logically ORed to cause the Event  
Summary Bit (ESB) of the Status Byte Register to be set. The query reads the Standard Event The query  
reads the Standard Event Status Enable register.  
Table 4-6. Bit Configuration of Standard Event Status Enable Register  
Bit Position  
Bit Name  
7
6
0
5
4
3
DDE  
8
2
QUE  
4
1
0
2
0
OPC  
1
PON  
CME  
32  
EXE  
Bit Weight  
128  
64  
16  
PON = Power-on has occurred  
CME = Command error  
EXE = Execution error  
DDE = Device-dependent error  
QUE = Query error  
OPC = Operation complete  
Command Syntax *ESE <NRf>  
Parameters 0 to 255  
(See *PSC)  
*ESE 129  
Power-On Value  
Examples  
Query Syntax *ESE?  
Returned Parameters <NR1>(Register value)  
Related Commands *ESR? *PSC *STB?  
CAUTION:  
If *PSC is programmed to 0, the *ESE command causes a write cycle to nonvolatile  
memory. Nonvolatile memory has a finite maximum number of write cycles. Programs  
that repeatedly cause write cycles to nonvolatile memory can eventually exceed the  
maximum number of write cycles and cause the memory to fail.  
*ESR?  
This query reads the Standard Event Status Event register. Reading the register clears it. The bit  
configuration is the same as the Standard Event Status Enable register (see *ESE).  
Query Syntax *ESR?  
None  
Parameters  
Returned Parameters <NR1>(Register binary value)  
Related Commands *CLS *ESE *ESE? *OPC  
*OPC  
This command causes the instrument to set the OPC bit (bit 0) of the Standard Event Status register when  
the has completed all pending operations. (See *ESE for the bit configuration of the Standard Event  
Status register.) Pending operations are complete when:  
u all commands sent before *OPC have been executed. This includes overlapped commands. Most  
commands are sequential and are completed before the next command is executed. Overlapped  
commands are executed in parallel with other commands. Commands that affect output voltage,  
current or state, relays, and trigger actions are overlapped with subsequent commands sent to the  
dc source. The *OPC command provides notification that all overlapped commands have been  
completed.  
u all triggered actions are completed  
65  
 
4 - Language Dictionary  
* OPC does not prevent processing of subsequent commands, but bit 0 will not be set until all pending  
operations are completed.  
*OPC? causes the instrument to place an ASCII "1" in the Output Queue when all pending operations are  
completed. Unlike *OPC, *OPC? prevents processing of all subsequent commands. It is intended to be  
used at the end of a command line so that the application program can then monitor the bus for data until  
it receives the "1" from the dc source Output Queue.  
Command Syntax *OPC  
None  
Parameters  
Query Syntax *OPC?  
Returned Parameters <NR1> 1  
Related Commands *OPC  
*TRIG *WAI  
*PSC  
This command controls the automatic clearing at power-on of the Service Request Enable and the  
Standard Event Status Enable registers  
causes these registers to be cleared at power-on. This prevents a PON event from  
generating SRQ at power-on.  
causes the contents of the Standard Event Enable and Service Request Enable registers  
to be saved in nonvolatile memory and recalled at power-on. This allows a PON event to  
generate SRQ at power-on.  
*PSC ON | 1  
*PSC OFF | 0  
The query returns the current state of *PSC.  
Command Syntax *PSC <Bool>  
0 | 1 | OFF | ON  
*PSC 0 *PSC 1  
Parameters  
Example  
Query Syntax *PSC?  
Returned Parameters <NR1>0|1  
Related Commands *ESE *SRE  
CAUTION:  
*PSC causes a write cycle to nonvolatile memory. Nonvolatile memory has a finite  
maximum number of write cycles. Programs that repeatedly cause write cycles to  
nonvolatile memory can eventually exceed the maximum number of write cycles and  
cause the memory to fail.  
*SRE  
This command sets the condition of the Service Request Enable Register. This register determines which  
bits from the Status Byte Register (see *STB for its bit configuration) are allowed to set the Master Status  
Summary (MSS) bit and the Request for Service (RQS) summary bit. A 1 in any Service Request Enable  
Register bit position enables the corresponding Status Byte Register bit and all such enabled bits then are  
logically ORed to cause Bit 6 of the Status Byte Register to be set.  
When the controller conducts a serial poll in response to SRQ, the RQS bit is cleared, but the MSS bit is  
not. When *SRE is cleared (by programming it with 0), the dc source cannot generate an SRQ to the  
controller.  
The query returns the current state of *SRE.  
66  
 
Language Dictionary - 4  
Command Syntax *SRE <NRf>  
0 to 255  
see *PSC  
*SRE 20  
Parameters  
Power-on Value  
Example  
Query Syntax *SRE?  
Returned Parameters <NR1> (register binary value)  
Related Commands *ESE *ESR *PSC  
CAUTION:  
If *PSC is programmed to 0, the *SRE command causes a write cycle to nonvolatile  
memory. Nonvolatile memory has a finite maximum number of write cycles. Programs  
that repeatedly cause write cycles to nonvolatile memory can eventually exceed the  
maximum number of write cycles and cause the memory to fail.  
*STB?  
This query reads the Status Byte register, which contains the status summary bits and the Output Queue  
MAV bit. Reading the Status Byte register does not clear it. The input summary bits are cleared when the  
appropriate event registers are read. The MAV bit is cleared at power-on, by *CLS’ or when there is no  
more response data available.  
A serial poll also returns the value of the Status Byte register, except that bit 6 returns Request for Service  
(RQS) instead of Master Status Summary (MSS). A serial poll clears RQS, but not MSS. When MSS is  
set, it indicates that the has one or more reasons for requesting service.  
Table 4-7. Bit Configuration of Status Byte Register  
Bit Position  
Bit Name  
7
6
5
4
3
2
0
1
0
0
0
OPER  
MSS  
ESB  
MAV  
QUES  
(RQS)  
Bit Weight  
128  
64  
32  
16  
8
4
2
1
ESB = Event status byte summary  
MAV = Message available  
MSS = Master status summary  
OPER = Operation status summary  
QUES = Questionable status summary  
RQS = Request for service  
Query Syntax *STB?  
Returned Parameters <NR1>(Register binary value)  
*WAI  
This command instructs the dc source not to process any further commands until all pending operations  
are completed. "Pending operations" are as defined under the *OPC command. *WAI can be aborted  
only by sending the dc source an GPIB DCL (Device Clear) command.  
Command Syntax WAI?  
None  
Parameters  
Related Commands *OPC*OPC?  
67  
 
4 - Language Dictionary  
System Commands  
System commands consist of system, display, and common commands.  
System commands commands control system functions that are not directly related to output control or  
measurement functions.  
Display commands control the front panel display of the .  
Common commands also perform system functions. The following common commands are discussed in  
this section: *IDN? *OPT? *RCL *RST *SAV *TST?.  
DISPlay  
This command turns the front panel display on or off. When off, the front panel display is blank. The  
display annunciators are not affected by this command.  
Command Syntax DISPlay[:WINDow][:STATe] <bool>  
Parameters 0 | 1| OFF| ON  
*RST Value ON  
Examples DISP ON  
DISPLAY:STATE ON  
Query Syntax DISPlay[:WINDow][STATe]?  
Returned Parameters <NR1> 0 or 1  
DISP:MODE  
DISP:TEXT  
*RST  
Related Commands  
DISPlay:MODE  
Switches the display between its normal instrument functions and a mode in which it displays text sent by  
the user. Text messages are defined with the DISPlay:TEXT command.  
Command Syntax DISPlay[:WINDow]:MODE NORMal|TEXT  
Parameters <CRD>NORMal | TEXT  
*RST Value NORM  
Examples DISP:MODE NORM DISPLAY:MODE TEXT  
Query Syntax DISPlay[:WINDow]:MODE?  
Returned Parameters <CRD> NORMAL or TEXT  
DISP DISP:TEXT *RST  
Related Commands  
DISPlay:TEXT  
This command sends character strings to the display when the display mode is set to TEXT. The  
character string is case-sensitive and must be enclosed in either single () or double () quotes. The display  
is capable of showing up to 14 characters. Strings exceeding 14 characters will be truncated.  
Command Syntax DISPlay[:WINDow]:TEXT [:DATA] <display_string>  
Parameters <display string>  
*RST Value null string  
DISP:TEXT "DEFAULT_MODE"  
Examples  
DISPLAY:WINDOW:TEXT:DATA ‘533.2E-1VOLTS’  
Query Syntax DISPlay[:WINDow]:TEXT?  
Returned Parameters <STR>(Last programmed text string)  
DISP DISP:MODE  
Related Commands  
68  
 
Language Dictionary - 4  
SYSTem:ERRor?  
This query returns the next error number followed by its corresponding error message string from the  
remote programming error queue. The queue is a FIFO (first-in, first-out) buffer that stores errors as they  
occur. As it is read, each error is removed from the queue. When all errors have been read, the query  
returns 0,NO ERROR. If more errors are accumulated than the queue can hold, the last error in the queue  
will be -350,TOO MANY ERRORS (see Appendix C for other error codes).  
You can use the front panel Error key to read errors from the queue. Errors generated at the front panel  
are not put into the queue but appear immediately on the display.  
Query Syntax SYSTem:ERRor?  
Parameters (None)  
<NR1>,<SRD>  
Returned Parameters  
Examples SYST:ERR?SYSTEM:ERROR?  
SYSTem:LANGuage  
This command switches the instrument between its SCPI command language and its compatibility  
language. The compatibility language is provided for emulation of older dc source systems and is  
described in Appendix B . Sending the command causes:  
The selected language to become active and to be stored in nonvolatile memory.  
The to reset to its power-on state.  
If the dc source is shut off, it will resume operation in the last-selected language when power is restored.  
Note that this command and query can be used regardless of the language that is presently selected.  
SYSTem:LANGuage<string>  
SCPI | COMPatibility  
Command Syntax  
Parameters  
last selected language  
SYST:LANG SCPI SYSTEM:LANGUAGE COMPATIBILITY  
Power-on Value  
Example  
Query Syntax SYSTem:LANGuage?  
Returned Parameters <CRD>  
SYSTem:VERSion?  
This query returns the SCPI version number to which the complies. The returned value is of the form  
YYYY.V, where YYYY represents the year and V is the revision number for that year.  
Query Syntax SYSTem:VERSion?  
(none)  
Returned Parameters <NR2>  
SYST:VERS?SYSTEM:VERSION?  
Parameters  
Examples  
69  
 
4 - Language Dictionary  
SYSTem:LOCal  
For RS-232 Operation Only  
This command places the dc source in local mode during RS-232 operation. The front panel keys are  
functional.  
Command Syntax SYSTem:LOCal  
Parameters None  
SYST:LOC  
Example  
SYST:REM SYST:RWL  
Related Commands  
SYSTem:REMote  
For RS-232 Operation Only  
This command places the dc source in remote mode during RS-232 operation. This disables all front  
panel keys except the Local key. Pressing the Local key while in the remote state returns the front panel to  
the local state.  
Command Syntax SYSTem:REMote  
Parameters None  
SYST:REM  
Example  
SYST:LOC SYST:RWL  
Related Commands  
SYSTem:RWLock  
For RS-232 Operation Only  
This command places the dc source in remote mode during RS-232 operation. All front panel keys  
including the Local key are disabled. Use SYSTem:LOCal to return the front panel to the local state.  
Command Syntax SYSTem:RWLock  
Parameters None  
SYST:RWL  
Example  
SYST:REM SYST:LOC  
Related Commands  
*IDN?  
This query requests the dc source to identify itself. It returns a string composed of four fields separated by  
commas.  
*IDN?  
Query Syntax  
<AARD>  
Field  
Information  
Returned Parameters  
Agilent Technologies  
xxxxxA  
Manufacturer  
model number followed by a letter suffix  
10-character serial number or 0  
Revision levels of firmware.  
nnnnA-nnnnn  
<A>.xx.xx  
AGILENT,66312A,0,A.00.01  
Example  
70  
 
Language Dictionary - 4  
*OPT?  
This query requests the dc source to identify any options that are installed. Options are identified by  
number A 0 indicates no options are installed.  
*OPT?  
Query Syntax  
<AARD>  
Returned Parameters  
*RCL  
WARNING:  
Recalling a previously stored state may place hazardous voltages at the dc source output.  
This command restores the dc source to a state that was previously stored in memory with the *SAV  
command to the specified location. All states are recalled with the following exceptions:  
u the trigger system is set to the Idle state by an implied ABORt command (this cancels any  
uncompleted trigger actions)  
u the calibration function is disabled by setting CAL:STATe to OFF  
NOTE:  
The device state stored in location 0 is automatically recalled at power turn-on when the  
OUTPut:PON:STATe is set to RCL0.  
*RCL <NRf>  
0 | 1 | 2 | 3  
*RCL 3  
Command Syntax  
Parameters  
Example  
*PSC *RST *SAV  
Related Commands  
*RST  
This command resets the to a factory-defined state as defined in the following table. *RST also forces an  
ABORt command.  
*RST  
None  
Command Syntax  
Parameters  
*PSC *SAV  
Related Commands  
71  
 
4 - Language Dictionary  
Table 4-8. *RST Settings  
CAL:STAT  
OFF  
[SOUR:]CURR  
10% of MAX*  
DIG:DATA  
0
[SOUR:]CURR:TRIG  
10% of MAX*  
DISP:STAT  
ON  
[SOUR:]CURR:PROT:STAT  
OFF  
DISP:MODE  
DISP:TEXT  
NORM  
[SOUR:]LIST:COUN  
[SOUR:]VOLT  
0
0
INIT:CONT  
OUTP  
OUTP:DFI  
OFF  
OFF  
OFF  
OFF  
[SOUR:]VOLT:TRIG  
[SOUR:]VOLT:PROT  
TRIG:ACQ:COUN:CURR  
TRIG:ACQ:COUN:VOLT  
TRIG:ACQ:HYST:CURR  
TRIG:ACQ:HYST:VOLT  
TRIG:ACQ:LEV:CURR  
TRIG:ACQ:LEV:VOLT  
TRIG:ACQ:SLOP:CURR  
TRIG:ACQ:SLOP:VOLT  
TRIG:ACQ:SOUR  
0
MAX*  
1
1
0
OUTP:DFI:SOUR  
OUTP:PROT:DEL  
OUTP:REL  
OUTP:REL:POL  
SENS:CURR:RANG  
SENS:CURR:DET  
SENS:FUNC  
SENS:SWE:OFFS:POIN  
SENS:SWE:POIN  
SENS:SWE:TINT  
.08 Norm; .008 Fast  
OFF  
NORM  
MAX  
ACDC  
VOLT  
0
0
MAX*  
MAX*  
POS  
POS  
INTERNAL  
BUS  
2048  
15.6 µs  
TRIG:TRAN:SOUR  
* Maximum values are model-dependent. Refer to Table 4-3.  
*SAV  
This command stores the present state of the dc source to the specified location in non-volatile memory.  
Up to 4 states can be stored. If a particular state is desired at power-on, it should be stored in location 0. It  
will then be automatically recalled at power turn-on if OUTPut:PON:STATe is set to RCL0. *RCL retrieves  
instrument states.  
*SAV <NRf>  
0 | 1 | 2 | 3  
*SAV 3  
Command Syntax  
Parameters  
Example  
*RCL *RST  
Related Commands  
CAUTION:  
*SAV causes a write cycle to nonvolatile memory. Nonvolatile memory has a finite  
maximum number of write cycles. Programs that repeatedly cause write cycles to  
nonvolatile memory can eventually exceed the maximum number of write cycles and  
cause the memory to fail.  
*TST?  
This query causes the to do a self-test and report any errors. 0 indicates that the dc source passed self-  
test. 1 indicates that one or more tests failed. Selftest errors are written to the error queue (see Appendix  
C).  
TST?  
Query Syntax  
<NR1>  
Returned Parameters  
72  
 
Language Dictionary - 4  
Trigger Commands  
Trigger commands consist of trigger and initiate commands.  
Trigger commands control the remote triggering of the dc source . Trigger commands (and Initate  
commands) are referenced either by name or by number. The correspondence between names and  
numbers is:  
Sequence Number  
1 (the default)  
2
Sequence Name  
TRANsient  
ACQuire  
Description  
Output transient trigger sequence  
Measurement acquire trigger sequence  
Initiate commands initialize the trigger system.  
ABORt  
This command cancels any trigger actions presently in process. Pending trigger levels are reset to their  
corresponding immediate values. ABORt also resets the WTG bit in the Operation Condition Status  
register (see chapter 3 under Programming the Status Registers). If INITiate:CONTinuous ON has been  
programmed, the trigger subsystem initiates itself immediately after ABORt, thereby setting WTG. ABORt  
is executed at power turn on and upon execution of *RCL or RST.  
ABORt  
None  
ABOR  
Command Syntax  
Parameters  
Examples  
INIT *RST *TRG TRIG  
Related Commands  
INITiate:SEQuence  
INITiate:NAME  
INIT:SEQ2 or INIT:NAME ACQ applies to Agilent 66312A, 66332A Only  
INITiate commands control the initiation of both output and measurement triggers. When a trigger is  
enabled, an event on a selected trigger source causes the specified triggering action to occur. If the trigger  
subsystem is not enabled, all trigger commands are ignored.  
INITiate[:IMMediate]:SEQuence[ 1 | 2 ]  
INITiate[:IMMediate]:NAME<name>  
Command Syntax  
For INIT:NAME  
INIT:SEQ2  
TRANsient | ACQuire  
INIT:NAME TRAN  
Parameters  
Examples  
ABOR INIT:CONT TRIG TRIG:SEQ:DEF *TRG  
Related Commands  
INITiate:CONTinuous:SEQuence1  
INITiate:CONTinuous:NAME  
These commands control the output transient trigger system.  
continuously initiates the output trigger system..  
1 or ON  
turns off continuous triggering. In this state, the output  
trigger system must be initiated for each trigger using INITiate:SEQuence.  
0 or OFF  
INITiate:CONTinuous:SEQuence1<bool>  
INITiate:CONTinuous:NAME TRANsient,<bool>  
0 | 1 | OFF | ON  
Command Syntax  
Parameters  
Examples  
Related Commands  
INIT:CONT:SEQ ON  
INIT:CONT:NAME TRAN, 1  
*TRG  
ABOR INIT TRIG TRIG:SEQ:DEF  
73  
 
4 - Language Dictionary  
TRIGger  
When the transient trigger subsystem is initiated, this command generates a trigger signal. The trigger will  
then:  
1. Initiate a pending level change as specified by CURRent:TRIGger or VOLTage;TRIGger.  
2. Clear the WTG bit in the Status Operation Condition register after both transient and acquire trigger  
sequences have completed. (WTG is the logical-or of both transient and acquire sequences.)  
3. If INITiate:CONTinuous ON has been programmed, the trigger subsystem is immediately re-enabled  
for subsequent triggers. As soon as it is cleared, the WTG bit is again set to 1.  
TRIGger[:SEQuence1][:IMMediate]  
TRIGger[:TRANsient][:IMMediate]  
None  
Command Syntax  
Parameters  
Examples  
TRIG  
TRIG:IMM  
ABOR CURR:TRIG INIT  
*TRG  
VOLT:TRIG  
Related Commands  
TRIGger:SOURce  
This command is included for completeness. It selects the trigger source for transient triggers. Since BUS  
is the only trigger source for transient triggers, this command does not need to be used.  
GPIB device, *TRG, or <GET> (Group Execute Trigger)  
BUS  
TRIGger[:SEQuence1]:SOURce<source>  
Command Syntax  
TRIGger[:TRANsient]:SOURce<source>  
BUS  
BUS  
TRIG:SOUR BUS  
Parameters  
*RST Value  
Examples  
TRIGger[:SEQuence1]:SOURce?  
TRIGger[:TRANsient]:SOURce?  
<CRD>  
Query Syntax  
Returned Parameters  
TRIGger:SEQuence2  
TRIGger:ACQuire  
Agilent 66312A, 66332A Only  
When the trigger subsystem is initiated, these commands generate a measurement trigger signal. The  
measurement trigger causes the dc source to measure the output voltage and current and store the  
results in a buffer.  
.
TRIGger:SEQuence2[:IMMediate]  
TRIGger:ACQuire:[:IMMediate]  
None  
Command Syntax  
Parameters  
Examples  
TRIG:SEQ2  
TRIG:ACQ  
TRIG:SOUR  
TRIG:SEQ2:DEF  
TRIG:SEQ2:COUN  
Related Commands  
TRIG:SEQ2:LEV:VOLT  
TRIG:SEQ2:SLOP:CURR  
74  
 
Language Dictionary - 4  
TRIGger:SEQuence2:COUNt:CURRent  
TRIGger:ACQuire:COUNt:CURRent  
Agilent 66312A, 66332A Only  
This command sets up a successive number of triggers for measuring current data. With this command,  
the trigger system needs to be initialized only once at the start of the acquisition period. After each  
completed measurement, the instrument waits for the next valid trigger condition to start another  
measurement. This continues until the count has completed.  
TRIGger:SEQuence2:COUNt:CURRent<NRf+>  
Command Syntax  
TRIGger:ACQuire:COUNt:CURRent<NRf+>  
1 to 100  
1
Parameters  
*RST Value  
Examples  
TRIG:SEQ2:COUN:CURR 5  
TRIGger:SEQuence2:COUNt:CURRent?  
TRIGger:ACQuire:COUNt:CURRent?  
<NR3>  
TRIG:ACQ:COUN:CURR 1  
Query Syntax  
Returned Parameters  
Related Commands  
TRIG:SEQ2  
TRIG:ACQ  
TRIGger:SEQuence2:COUNt:VOLTage  
TRIGger:ACQuire:COUNt:VOLTage  
Agilent 66312A, 66332A Only  
This command sets up a successive number of triggers for measuring voltage data. With this command,  
the trigger system needs to be initialized only once at the start of the acquisition period. After each  
completed measurement, the instrument waits for the next valid trigger condition to start another  
measurement. This continues until the count has completed.  
TRIGger:SEQuence2:COUNt:VOLTage<NRf+>  
Command Syntax  
TRIGger:ACQuire:COUNt:VOLTage<NRf+>  
1 to 100  
Parameters  
*RST Value  
Examples  
1
TRIG:SEQ2:COUN:VOLT 5  
TRIG:ACQ:COUN:VOLT 1  
TRIGger:SEQuence2:COUNt:VOLTage?  
TRIGger:ACQuire:COUNt:VOLTage?  
<NR3>  
Query Syntax  
Returned Parameters  
Related Commands  
TRIG:SEQ2  
TRIG:ACQ  
75  
 
4 - Language Dictionary  
TRIGger:SEQuence2:HYSTeresis:CURRent  
TRIGger:ACQuire:HYSTeresis:CURRent  
Agilent 66312A, 66332A Only  
This command defines a band around the trigger level through which the signal must pass before an  
internal measurement can occur. The band limit above and below the trigger level is one half of the  
hysteresis value added to or subtracted from the trigger level.  
For a positive trigger to occur, the excursion of an output waveform in the positive direction must start  
below the lower hysteresis band limit and pass through the upper hysteresis band limit. For a negative  
trigger to occur, the excursion of an output waveform in the negative direction must start above the upper  
hysteresis band limit and pass through the lower hysteresis band limit.  
TRIGger:SEQuence2:HYSTeresis:CURRent<NRf+>  
Command Syntax  
TRIGger:ACQuire:HYSTeresis:CURRent<NRf+>  
0 to MAX (see table 4-3)  
A (amperes)  
Parameters  
Unit  
0
*RST Value  
Examples  
Query Syntax  
TRIG:SEQ2:HYST:CURR 0.5 TRIG:ACQ:HYST:CURR 0.5  
TRIGger:SEQuence2:HYSTeresis:CURRent?  
TRIGger:ACQuire:HYSTeresis:CURRent?  
<NR3>  
Returned Parameters  
Related Commands  
TRIG:SEQ2:HYST:VOLT  
TRIG:SEQ2:LEV:CURR  
TRIGger:SEQuence2:HYSTeresis:VOLTage  
TRIGger:ACQuire:HYSTeresis:VOLTage  
Agilent 66312A, 66332A Only  
This command defines a band around the trigger level through which the signal must pass before an  
internal measurement can occur. The band limit above and below the trigger level is one half of the  
hysteresis value added to or subtracted from the trigger level.  
For a positive trigger to occur, the excursion of an output waveform in the positive direction must start  
below the lower hysteresis band limit and pass through the upper hysteresis band limit. For a negative  
trigger to occur, the excursion of an output waveform in the negative direction must start above the upper  
hysteresis band limit and pass through the lower hysteresis band limit.  
TRIGger:SEQuence2:HYSTeresis:VOLTage<NRf+>  
Command Syntax  
TRIGger:ACQuire:HYSTeresis:VOLTage<NRf+>  
0 to MAX (see table 4-3)  
V (volts)  
0
Parameters  
Unit  
*RST Value  
Examples  
Query Syntax  
TRIG:SEQ2:HYST:VOLT 2  
TRIG:ACQ:HYST:VOLT 2  
TRIGger:SEQuence2:HYSTeresis:VOLTage?  
TRIGger:ACQuire:HYSTeresis:VOLTage?  
<NR3>  
Returned Parameters  
Related Commands  
TRIG:SEQ2:HYST:CURR  
TRIG:SEQ2:LEV:VOLT  
76  
 
Language Dictionary - 4  
TRIGger:SEQuence2:LEVel:CURRent  
TRIGger:ACQuire:LEVel:CURRent  
Agilent 66312A, 66332A Only  
This command sets the trigger level for internally triggered current measurements. A positive current  
trigger occurs when the current level changes from a value less than the lower hysteresis band limit to a  
value greater than the upper hysteresis band limit. Similarly, a negative current trigger occurs when the  
current level changes from a value greater than the upper hysteresis band limit to a value less than the  
lower hysteresis band limit.  
TRIGger:SEQuence2:LEVel:CURRent<NRf+>  
TRIGger:ACQuire:LEVel:CURRent<NRf+>  
0 to MAX (see table 4-3)  
Command Syntax  
Parameters  
Unit  
A (amperes)  
0
*RST Value  
Examples  
TRIG:SEQ2:LEV:CURR 5 TRIG:ACQ:LEV:CURR MAX  
TRIG:ACQ:LEV 2  
TRIGger:SEQuence2:LEVel:CURRent?  
TRIGger:ACQuire:LEVel:CURRent?  
<NR3>  
Query Syntax  
Returned Parameters  
Related Commands  
TRIG:SEQ2:LEV:VOLT  
TRIG:SEQ2:HYST:CURR  
TRIGger:SEQuence2:LEVel:VOLTage  
TRIGger:ACQuire:LEVel:VOLTage  
Agilent 66312A, 66332A Only  
This command sets the trigger level for internally triggered voltage measurements. A positive voltage  
trigger occurs when the voltage level changes from a value less than the lower hysteresis band limit to a  
value greater than the upper hysteresis band limit. Similarly, a negative voltage trigger occurs when the  
voltage level changes from a value greater than the upper hysteresis band limit to a value less than the  
lower hysteresis band limit.  
TRIGger:SEQuence2:LEVel:VOLTage<NRf+>  
Command Syntax  
TRIGger:ACQuire:LEVel:VOLTage<NRf+>  
0 to MAX (see table 4-3)  
V (volts)  
0
TRIG:SEQ2:LEV:VOLT 5  
TRIG:ACQ:LEV 2  
Parameters  
Unit  
*RST Value  
Examples  
TRIG:ACQ:LEV:VOLT MAX  
TRIGger:SEQuence2:LEVel:VOLTage?  
TRIGger:ACQuire:LEVel:VOLTage?  
<NR3>  
Query Syntax  
Returned Parameters  
Related Commands  
TRIG:SEQ2:LEV:CURR  
TRIG:SEQ2:HYST:VOLT  
77  
 
4 - Language Dictionary  
TRIGger:SEQuence2:SLOPe:CURRent  
TRIGger:ACQuire:SLOPe:CURRent  
Agilent 66312A, 66332A Only  
This command sets the slope of an internally triggered current measurement.  
triggering occurs on the rising edge.  
triggering occurs on the falling edge.  
triggering occurs on either edge.  
POSitive  
NEGative  
EITHer  
TRIGger:SEQuence2:SLOPe:CURRent<slope>  
Command Syntax  
TRIGger:ACQuire:SLOPe:CURRent<slope>  
EITHer|POSitive|NEGative  
EITHer  
Parameters  
*RST Value  
Examples  
TRIG:SEQ2:SLOP:CURR POS TRIG:ACQ:SLOP:CURR EITH  
TRIGger:SEQuence2:SLOPe:CURRent?  
TRIGger:ACQuire:SLOPe:CURRent?  
<CRD>  
Query Syntax  
Returned Parameters  
Related Commands  
TRIG:SEQ2:SLOP:VOLT  
TRIGger:SEQuence2:SLOPe:VOLTage  
TRIGger:ACQuire:SLOPe:VOLTage  
Agilent 66312A, 66332A Only  
This command sets the slope of an internally triggered voltage measurement.  
triggering occurs on the rising edge.  
triggering occurs on the falling edge.  
triggering occurs on either edge.  
POSitive  
NEGative  
EITHer  
TRIGger:SEQuence2:SLOPe:VOLTage<slope>  
Command Syntax  
TRIGger:ACQuire:SLOPe:VOLTage<slope>  
EITHer|POSitive|NEGative  
EITHer  
Parameters  
*RST Value  
Examples  
TRIG:SEQ2:SLOP:VOLT POS TRIG:ACQ:SLOP:VOLT EITH  
TRIGger:SEQuence2:SLOPe:VOLTage?  
TRIGger:ACQuire:SLOPe:VOLTage?  
<CRD>  
Query Syntax  
Returned Parameters  
Related Commands  
TRIG:SEQ2:SLOP:CURR  
78  
 
Language Dictionary - 4  
TRIGger:SEQuence2:SOURce  
TRIGger:ACQuire:SOURce  
Agilent 66312A, 66332A Only  
These commands select the trigger source for measurement triggers as follows:  
GPIB device, *TRG, or <GET> (Group Execute Trigger)  
BUS  
trigger is generated internally when the measured waveform crosses the trigger level  
with the selected slope.  
INTernal  
TRIGger:SEQuence2:SOURce<source>  
TRIGger:ACQuire:SOURce<source>  
BUS | INTernal  
INTernal  
TRIG:ACQ:SOUR BUS  
Command Syntax  
Parameters  
*RST Value  
Examples  
TRIGger:SEQuence2:SOURce?  
TRIGger:ACQuire:SOURce?  
<CRD>  
Query Syntax  
Returned Parameters  
TRIGger:SEQuence1:DEFine  
TRIGger:SEQuence2:DEFine  
TRIGger:SEQuence2:DEFine applies to Agilent 66312A, 66332A Only  
These commands define the names that are aliased to trigger sequences 1 and 2. The command accepts  
only ACQuire for sequence 2 and TRANsient for sequence 1 as predefined names. The query allows the  
user to query the instrument names aliased to sequences 1 and 2.  
TRIGger:SEQuence1:DEFine TRANsient  
TRIGger:SEQuence2:DEFine ACQuire  
TRANsient, ACQuire  
Command Syntax  
Parameters  
Examples  
SEQ1:DEF ACQ  
SEQ2:DEF TRAN  
TRIGger:SEQuence1:DEFine?  
TRIGger:SEQuence2:DEFine?  
<CRD>  
Query Syntax  
Returned Parameters  
Related Commands  
TRIG:SEQ2:ACQ  
TRIG:SEQ1:TRAN  
*TRG  
This common command generates a trigger when the trigger subsystem has BUS selected as its source.  
The command has the same affect as the Group Execute Trigger (<GET>) command.  
In RS-232 mode, this command emmulates some of the functionality of the IEEE-488 Group Execute  
Trigger command.  
*TRG  
None  
Command Syntax  
Parameters  
ABOR INIT TRIG[:IMM] <GET>  
Related Commands  
79  
 
 
A
SCPI Conformance Information  
SCPI Version  
The Agilent Dynamic Measurement DC Source conforms to SCPI Version 1995.0.  
SCPI Confirmed Commands  
ABOR  
SENS:SWE:POIN  
SENS:SWE:TINT  
STAT:OPER[:EVEN]?  
STAT:OPER:COND?  
STAT:OPER:ENAB  
STAT:OPER:NTR  
STAT:OPER:PTR  
STAT:PRES  
STAT:QUES[:EVEN]?  
STAT:QUES:COND?  
STAT:QUES:ENAB  
STAT:QUES:NTR  
STAT:QUES:PTR  
SYST:ERR?  
CAL:DATA  
CAL:STAT  
DISP[:WIND][:STAT]  
DISP[:WIND]:TEXT[:DATA]  
INIT[:IMM]:SEQ | NAME  
INIT:CONT:SEQ | NAME  
MEAS | FETC:ARR:CURR[:DC]?  
MEAS | FETC:ARR:VOLT[:DC]?  
MEAS | FETC[:SCAL]:CURR[:DC]?  
MEAS | FETC[:SCAL]:CURR:HIGH?  
MEAS | FETC[:SCAL]:CURR:LOW?  
MEAS | FETC[:SCAL]:CURR:MAX?  
MEAS | FETC[:SCAL]:CURR:MIN?  
MEAS | FETC[:SCAL]:VOLT[:DC]?  
MEAS | FETC[:SCAL]:VOLT:HIGH?  
MEAS | FETC[:SCAL]:VOLT:LOW?  
MEAS | FETC[:SCAL]:VOLT:MAX?  
MEAS | FETC[:SCAL]:VOLT:MIN?  
OUTP[:STAT]  
SYST:LANG  
SYST:VERS?  
TRIG[:SEQ1 | :TRAN][:IMM]  
TRIG[:SEQ1 | :TRAN]:SOUR  
TRIG:SEQ2 | ACQ[:IMM]  
TRIG:SEQ2 | ACQ:SOUR  
TRIG:SEQ:DEF  
*CLS  
OUTP:PROT:CLE  
OUTP:PROT:DEL  
[SOUR]:CURR[:LEV][:IMM][:AMPL]  
[SOUR]:CURR[:LEV]:TRIG[:AMPL]  
[SOUR]:CURR:PROT:STAT  
[SOUR]:VOLT[:LEV][:IMM][:AMPL]  
[SOUR]:VOLT[:LEV]:TRIG[:AMPL]  
[SOUR]:VOLT:PROT  
*ESE*ESE?*ESR?  
*IDN?  
*OPC*OPC?*OPT?  
*PSC*PSC?  
*RCL*RST  
*SAV*SRE*STB?  
*TRG*TST?  
SENS:CURR[:DC]:RANG[:UPP]  
SENS:FUNC  
*WAI  
SENS:SWE:OFFS:POIN  
Non-SCPI Commands  
CAL:CURR[:SOUR][:DC][:POS]  
CAL:CURR[:SOUR][:DC]:NEG  
CAL:MEAS[:DC]:LOWR  
CAL:MEAS:AC  
OUTP:DFI:SOUR  
OUTP:PON:STAT  
OUTP:REL[:STAT]  
OUTP:REL:POL  
CAL:LEV  
OUTP:RI:MODE  
CAL:PASS  
SENS:CURR:DET  
CAL:SAVE  
CAL:VOLT[:DC]  
[SOUR]:DIG:DATA[:VAL]  
[SOUR]:DIG:FUNC  
CAL:VOLT:PROT  
TRIG:SEQ2 | ACQ:COUN:CURR | :VOLT  
TRIG:SEQ2 | ACQ:HYST:CURR | :VOLT  
TRIG:SEQ2 | ACQ:LEV:CURR | :VOLT  
TRIG:SEQ2 | ACQ:SLOP:CURR | :VOLT  
DISP[:WIND]:MODE  
MEAS | FETC[:SCAL]:CURR:ACDC?  
MEAS | FETC[:SCAL]:VOLT:ACDC?  
OUTP:DFI[:STAT]  
81  
 
 
B
Compatibility Language  
Introduction  
The Agilent power supplies covered by this manual are programmatically compatible with the HP/Agilent  
6632A, 6633A, and 6634A dc power supplies. This means that by using COMPatibility language mode you  
can program these newer dc sources over the GPIB using COMPatibility commands.  
To switch from SCPI commands to COMPatibility commands (and vice versa), use the SYST:LANG  
command, as documented in chapter 4. The language setting is saved in non-volatile memory.  
Table B-2 summarizes the COMPatibility commands that program the supplies. You may need to refer to  
the HP/Agilent Series 6632, 6633A, and 6634A Operating Guide (p/n 5957-6360) for complete information  
on the COMPatibility commands.  
The rest of this appendix discusses the COMPatibility language status system, and the COMPatibility  
language error codes.  
Note:  
For complete information on the Compatibility programming language, order the  
HP/Agilent 6632A/6633A/6634A Operating manual, p/n 5957-6360.  
Table B-1. COMPatibility Power-on Settings  
Command  
DC  
Setting  
1 (ON)  
Command  
POL  
Setting  
1 (normal)  
DLY  
8 ms (fast)  
80 ms (normal)  
1 (ON)  
0.04 A (6631B)  
0.02 A (6632B)  
0.008 A (6633B)  
0.004 A (6634B)  
OFF  
PON  
last stored value  
DSP  
ISET  
RELAY  
RLYPON  
1 (close)  
1 (close)  
OCP  
OUT  
OVSET  
SRQ  
UNMASK  
VSET  
0
0
0 V  
1 (ON)  
MAX  
83  
 
B - Compatibility Language  
Table B-2. COMPatibility Commands  
Description  
Compatibility  
Command  
Similar SCPI  
Command  
ASTS?  
This command reads the contents of the accumulated status  
register, which stores any bit condition entered in the status  
register since the accumulated status register was last read,  
regardless of whether the condition still exists.  
Data Representation: ZZZZD  
STAT:OPER?  
STAT:QUES?  
*ESE?  
CLR  
This command initializes the dc source to the power-on state. It  
also resets the PON bit in the serial poll register. The command  
performs the same function as the Device Clear (DCL) interface  
message.  
*RST  
DC 0 | 1  
DLY <n>  
Only applies to units with Relay Option 760. This command  
enables or disables the output without affecting the state of the  
output relays.  
OUTP:STAT[:NOR]  
0 | 1 | OFF | ON  
Initial condition: DC 1  
This command programs the delay time between the programming OUTP:PROT:DEL  
of an output change that produces a CV, CC, or an UNREG  
condition, and the recording of that condition by the status  
registers. This can be used to prevent false triggering of the  
OverCurrent Protection feature (OCP).  
Initial delay: 0.08s (Normal); 0.008s (Fast).  
DSP 0 | 1  
ERR?  
This command enables or disables the dc source’s front panel  
display.  
Initial condition: DSP 1  
This command determines the type of programming error detected SYST:ERR?  
by the dc source. A remote programming error sets the ERR bit in  
the status register, which can be enabled by UNMASK to request  
service.  
DISP 0|1|OFF|ON  
FAULT?  
This command reads which bits have been set in the fault register. STAT:OPER?  
A bit is set in the fault register when the corresponding bit in the  
status register changes from inactive to active AND the  
corresponding bit in the mask register has been enabled. The fault  
register is reset only after it has been read. The decimal equivalent  
of the total bit weight of all enabled bits is returned.  
Data Representation: ZZZZD  
STAT:QUES?  
*ESE  
ID?  
This command causes the dc source to report its model number  
and any options that affect the dc source’s output.  
Data Representation: Agilent663XA  
*IDN?  
IOUT?  
This command measures and returns the actual output current.  
Data Representation: SD.DDDD  
This command programs the output current. See Table 4-3 for the  
programming range of this command.  
MEAS:CURR?  
CURR  
ISET <n>  
Initial condition: see Table B-1  
OCP 0 | 1  
OUT 0 | 1  
This command enables or disables the dc source’s overcurrent  
protection. If this function is enabled and the dc source goes into  
CC mode, the output of the dc source is disabled. Initial condition:  
OCP 0  
This command enables or disables the dc source’s output. The dc  
source will be able to implement commands even while the output  
is disabled. Initial condition: OUT 1  
CURR:PROT:STAT  
0 | 1 | OFF | ON  
OUTP:STAT  
0 | 1 | OFF | ON  
84  
 
Compatibility Language - B  
Table B-2. COMPatibility Commands (continued)  
Description  
Compatibility  
Command  
Similar SCPI  
Command  
OVSET <n>  
This command programs the overvoltage protection. See Table  
4-3 for the programming range of this command.  
Initial condition: MAX  
VOLT:PROT  
POL 0 | 1  
Only applies to units with Option 760. This command sets the  
polarity of the output relays to either normal (1) or inverted (0).  
Initial condition: POL 1  
This command enables (1) or disables (0) SRQ at power-on.  
Initial condition: last programmed value  
OUTP:REL:POL 0|1  
PSC 0 | 1  
PON 0 | 1  
RELAY 0 | 1  
Only applies to units with Relay Option 760. This command opens OUTP:REL 0 | 1  
(0) or closes (1) the output relays without affecting the  
programmed output state of the unit.  
Initial condition: RELAY 1  
RLYPON 0 | 1 Only applies to units with Relay Option 760. This command opens RCL 0  
(0) or closes (1) the output relays at power-on without affecting  
the programmed output state of the unit.  
Initial condition: RLYPON 1  
ROM?  
RST  
This command returns the ROM version of the dc source.  
Data Representation: AAA AAA  
This command resets the dc source if the output is disabled by  
the output protection circuits.  
This command sets the current measurement range of the dc  
source. See Table 4-3 for the programming range of this  
command.  
*IDN?  
OUTP:PROT:CLE  
SENS:CURR:RANG  
SENS:CURR  
:RANG <n>  
Initial condition: MAX  
SENS:SWE  
:POIN <n>  
This command defines the number of data points in a  
measurement sweep.  
Initial condition: 32  
This command defines the time period between measurement  
samples.  
Initial condition: 15.6 µs.  
These commands enable or disable the dc source's ability to  
request service from the controller for fault conditions. UNMASK  
defines which conditions are defined as faults.  
Initial condition: SRQ 0  
SENS:SWE:POIN  
SENS:SWE:TINT  
*SRE  
SENS:SWE  
:TINT <n>  
SRQ 0 | 1  
STS?  
This command reads the contents of the status register, which  
maintains the present status of the dc source.  
Data Representation: ZZZZD  
STAT:OPER:COND?  
STAT:QUES:COND?  
*ESE?  
SYST:LANG  
This command causes the alternate language to become active  
and to be stored in nonvolatile memory. In this case, the  
commands are equivalent. After being shut off, the dc source will  
resume in the last-selected language when power is restored.  
The parameter must be either COMP or SCPI.  
This command causes the dc source to run selftest and report  
any detected failures.  
SYST:LANG  
TEST?  
*TST?  
Data Representation: ZZZZD  
85  
 
B - Compatibility Language  
Table B-2. COMPatibility Commands (continued)  
Description  
Compatibility  
Command  
Similar SCPI  
Command  
UNMASK  
xxx  
These commands determine the conditions that will set bits in the  
fault register, allowing the operator to define the conditions that will STAT:QUES:ENAB  
STAT:OPER:ENAB  
be reported as fault Fault conditions can be enabled by sending  
the decimal equivalent of the total bit weight of all conditions to be  
enabled.  
*ESE  
VOUT?  
This command measures and returns the actual output voltage.  
Data Representation: SZZD.DD; (SZD.DDD for 6634B only)  
MEAS:VOLT?  
VSET <n>  
This command programs the output voltage. See Table 4-3 for the VOLT  
programming range of this command.  
Initial condition: 0 V  
A = Alpha  
D = Digit  
S = Sign (blank for positive and – for negative)  
Z = Digit with leading zeros output as spaces  
Table B-3. COMPatibility Errors  
NumberError String [Description/Explanation/Examples]  
Error  
ERR 0  
ERR 1  
ERR 2  
No error  
EEPROM save failed [Data write to non-volatile memory failed]  
Second PON after power-on [More than one PON command received after power-on. Only one  
is allowed.]  
ERR 4  
RLYPON sent with no relay option present [A RLYPON command was sent with no relay option  
present.]  
ERR 5  
ERR 8  
No relay option present [A relay option command was sent with no relay option present.]  
Addressed to talk and nothing to say [The unit was addressed to talk without first receiving a  
query.]  
ERR 10  
ERR 11  
ERR 20  
ERR 21  
ERR 22  
Header expected [A non-alpha character was received when a header was expected.]  
Unrecognized header [The string of alpha characters received was not a valid command.]  
Number expected [A non-numeric character was received when a number was expected.]  
Number Syntax [The numeric character received did not represent a proper number.]  
Number out of internal range [The number received was too large or small to be represented in  
internal format.]  
ERR 30  
ERR 31  
ERR 41  
ERR 42  
ERR 43  
ERR 44  
ERR 45  
ERR 46  
ERR 51  
Comma [A comma was not received where one was expected.]  
Terminator expected [A valid terminator was not received where one was expected.]  
Parameter Out [The number received exceeded the limits for its associated command.]  
Voltage Programming Error [The programmed value exceeded the valid voltage limits.]  
Current Programming Error [The programmed value exceeded the valid current limits.]  
Overvoltage Programming Error [The programmed value exceeded the valid overvoltage limits.]  
Delay Programming Error [The programmed value exceeded the valid delay limits.]  
Mask Programming Error [The programmed value exceeded the fault mask limits.]  
EEPROM Checksum [EEPROM failed, or a new uncalibrated EEPROM was installed.]  
86  
 
Compatibility Language - B  
STATUS  
REGISTER  
1
2
4
CV  
+CC  
UNR  
OV  
8
16  
OT  
32  
64  
not used  
OC  
FAULT  
REGISTER  
128  
256  
512  
ERR  
INH  
1
2
-CC  
1024  
2048  
FAST  
NORM  
4
SERIAL  
8
POLL  
16  
ACCUMULATED  
STATUS  
REGISTER  
32  
FAU  
MASKUS  
1
64  
REGISTER  
REGISTER  
2
PON  
128  
4
1
2
4
not used  
not used  
256  
512  
CV  
+CC  
1
2
4
8
16  
1024  
2048  
UNR  
OV  
RDY  
ERR  
RQS  
32  
64  
8
8
16  
16  
OT  
128  
32  
64  
not used  
not used  
OC  
32  
64  
128  
256  
512  
ERR  
INH  
128  
256  
512  
-CC  
1024  
2048  
1024  
2048  
FAST  
NORM  
Figure B-1. COMpatibility Status Model  
Table B-4. Bit Assignment of Status, Astatus, Fault, & Mask Registers  
Bit Position  
Bit Name  
11  
10  
9
8
7
6
5
4
OT  
3
OV  
2
1
0
NORM FAST  
-CC INH  
ERR OC  
not  
used  
32  
UNR +CC CV  
Bit Weight  
2048  
1024  
512 256  
128 64  
16  
8
4
2
1
CV = The unit is operating in constant voltage mode.  
CC+ = The unit is operating in constant current mode.  
UNR = The output of the unit is unregulated.  
OV = The overvoltage protection circuit has tripped.  
OT = The over-temperature protection circuit has tripped.  
OC = The overcurrent protection circuit has tripped.  
ERR = A programming error has occurred. Use ERR? to clear.  
CC = The unit is operating in negative constant current mode.  
INH = The external remote inhibit signal has turned the output off.  
FAST = The output is in Fast operating mode. (Agilent 66332A, 6631B, 6632B, 6633B, 6634B only)  
NORM = The output is in Normal operating mode. (Agilent 66332A, 6631B, 6632B, 6633B, 6634B only)  
Table B-5. Bit Configuration of Serial Poll Register  
Bit Position  
Bit Name  
Bit Weight  
7
6
5
ERR  
32  
4
RDY  
16  
3
2
1
0
FAU  
1
not used RQS  
64  
not used not used PON  
2
RQS = The dc source has generated a service request. Use a serial poll to clear.  
ERR = Same as ERR bit in Status register. Use ERR? to clear.  
RDY = This bit cleared when unit busy processing commands. Set when processing complete.  
PON = A Power-on has occurred. Use CLR to clear.  
FAU = A bit has been set in the Fault register. Use FAULT? to clear.  
87  
 
 
C
Error Messages  
Error Number List  
This appendix gives the error numbers and descriptions that are returned by the dc source. Error  
numbers are returned in two ways:  
Error numbers are displayed on the front panel  
Error numbers and messages are read back with the SYSTem:ERRor? query. SYSTem:ERRor?  
returns the error number into a variable and returns two parameters: an NR1 and a string.  
The following table lists the errors that are associated with SCPI syntax errors and interface problems. It  
also lists the device dependent errors. Information inside the brackets is not part of the standard error  
message, but is included for clarification.  
When errors occur, the Standard Event Status register records them as follows:  
Bit Set  
Error Code  
Error Type  
Bit Set  
Error Code  
Error Type  
5
-100 thru -199  
Command  
3
-300 thru -399 or Device-dependent  
1 thru 32767  
4
200 thru -299  
Execution  
2
-400 thru -499  
Query  
Table C-1. Error Numbers  
Error String [Description/Explanation/Examples]  
Error  
Number  
–100  
–101  
–102  
–103  
–104  
–105  
–108  
–109  
–112  
–113  
–121  
–123  
–124  
–128  
–131  
–138  
Command error [generic]  
Invalid character  
Syntax error [unrecognized command or data type]  
Invalid separator  
Data type error [e.g., "numeric or string expected, got block data"]  
GET not allowed  
Parameter not allowed [too many parameters]  
Missing parameter [too few parameters]  
Program mnemonic too long [maximum 12 characters]  
Undefined header [operation not allowed for this device]  
Invalid character in number [includes "9" in octal data, etc.]  
Numeric overflow [exponent too large; exponent magnitude >32 k]  
Too many digits [number too long; more than 255 digits received]  
Numeric data not allowed  
Invalid suffix [unrecognized units, or units not appropriate]  
Suffix not allowed  
89  
 
C - Error Messages  
Table C-1. Error Numbers (continued)  
Error  
Error String [Description/Explanation/Examples]  
Number  
–141  
–144  
–148  
–150  
–151  
–158  
–160  
–161  
–168  
–170  
–171  
–178  
–200  
–222  
–223  
–224  
–225  
–270  
–272  
–273  
–276  
–277  
–310  
–350  
–400  
–410  
–420  
–430  
–440  
0
Invalid character data [bad character, or unrecognized]  
Character data too long  
Character data not allowed  
String data error  
Invalid string data [e.g., END received before close quote]  
String data not allowed  
Block data error  
Invalid block data [e.g., END received before length satisfied]  
Block data not allowed  
Expression error  
Invalid expression  
Expression data not allowed  
Execution error [generic]  
Data out of range [e.g., too large for this device]  
Too much data [out of memory; block, string, or expression too long]  
Illegal parameter value [device-specific]  
Out of memory  
Macro error  
Macro execution error  
Illegal macro label  
Macro recursion error  
Macro redefinition not allowed  
System error  
Too many errors [errors beyond 9 lost due to queue overflow]  
Query error [generic]  
Query INTERRUPTED [query followed by DAB or GET before response complete]  
Query UNTERMINATED [addressed to talk, incomplete programming message received]  
Query DEADLOCKED [too many queries in command string]  
Query UNTERMINATED [after indefinite response]  
No error  
1
2
3
4
5
10  
Non-volatile RAM RD0 section checksum failed  
Non-volatile RAM CONFIG section checksum failed  
Non-volatile RAM CAL section checksum failed  
Non-volatile RAM STATE section checksum failed  
Non-volatile RST section checksum failed  
RAM selftest  
11  
VDAC/IDAC selftest 1  
12  
VDAC/IDAC selftest 2  
13  
VDAC/IDAC selftest 3  
14  
VDAC/IDAC selftest 4  
15  
OVDAC selftest  
80  
Digital I/O selftest error  
90  
 
Error Messages - C  
Table C-1. Error Numbers (continued)  
Error  
Error String [Description/Explanation/Examples]  
Number  
213  
216  
217  
218  
220  
221  
222  
223  
224  
401  
402  
403  
404  
405  
406  
407  
408  
601  
602  
603  
604  
Ingrd receiver buffer overrun  
RS-232 receiver framing error  
RS-232 receiver parity error  
RS-232 receiver overrun error  
Front panel uart overrun  
Front panel uart framing  
Front panel uart parity  
Front panel buffer overrun  
Front panel timeout  
CAL switch prevents calibration  
CAL password is incorrect  
CAL not enabled  
Computed readback cal constants are incorrect  
Computed programming cal constants are incorrect  
Incorrect sequence of calibration commands  
CV or CC status is incorrect for this command  
Output mode switch must be in NORMAL position  
Too many sweep points  
Command only applies to RS-232 interface  
CURRent or VOLTage fetch incompatible with last acquisition  
Measurement overrange  
91  
 
 
D
Example Programs  
Introduction  
The example programs in this section are intended to show how some of the same dc source  
functions can be programmed to each of the following GPIB interfaces:  
1. HP Vectra PC controller with Agilent 82335A GPIB Interface Command Library  
2. IBM PC controller with National Instuments GPIB-PCII Interface/Handler  
3. Agilent controller with BASIC Language System  
Assigning the GPIB Address in Programs  
The dc source address cannot be set remotely. It must be set using the front panel Address key.  
Once the address is set, you can assign it inside programs. The following examples assume that  
the GPIB select code is 7, and the dc source is assigned to the variable PS.  
1070 PS=706  
!Agilent 82335A Interface  
!BASIC Interface  
1070 ASSIGN @PS TO 706  
For systems using the National Instruments DOS driver, the address is specified in the software  
configuration program (IBCONFIG.EXE) and assigned a symbolic name. The address then is  
referenced only by this name within the application program (see the National Instruments GPIB  
documentation).  
Types of DOS Drivers  
The Agilent 82335A and National Instruments GPIB are two popular DOS drivers. Each is briefly  
described here. See the software documention supplied with the driver for more details.  
Agilent 82335A Driver  
For GW-BASIC programming, the GPIB library is implemented as a series of subroutine calls. To  
access these subroutines, your application program must include the header file SETUP.BAS,  
which is part of the DOS driver software.  
SETUP.BAS starts at program line 5 and can run up to line 999. Your application programs must  
begin at line 1000. SETUP.BAS has built-in error checking routines that provide a method to  
check for GPIB errors during program execution. You can use the error-trapping code in these  
routines or write your own code using the same variables as used by SETUP.BAS.  
National Instruments GPIB Driver  
Your program must include the National Instruments header file DECL.BAS. This contains the  
initialization code for the interface. Prior to running any applications programs, you must set up the  
interface with the configuration program (IBCONF.EXE).  
93  
 
D - Example Programs  
Your application program will not include the dc source’s symbolic name and GPIB address.  
These must be specified during configuration (when you run IBCONF.EXE). Note that the primary  
address range is from 0 to 30 but any secondary address must be specified in the address range  
of 96 to 126. The dc source expects a message termination on EOI or line feed, so set EOI w/last  
byte of Write. It is also recommended that you set Disable Auto Serial Polling.  
All function calls return the status word IBSTA%, which contains a bit (ERR) that is set if the call  
results in an error. When ERR is set, an appropriate code is placed in variable IBERR%. Be sure  
to check IBSTA% after every function call. If it is not equal to zero, branch to an error handler that  
reads IBERR% to extract the specific error.  
Error Handling  
If there is no error-handling code in your program, undetected errors can cause unpredictable  
results. This includes "hanging up" the controller and forcing you to reset the system. Both of the  
above DOS drivers have routines for detecting program execution errors. Error detection should  
be used after every call to a subroutine.  
BASIC Controllers  
The BASIC Programming Language provides access to GPIB functions at the operating system  
level. This makes it unnecessary to have the header files required in front of DOS applications  
programs. Also, you do not have to be concerned about controller "hangups" as long as your  
program includes a timeout statement. Because the dc source can be programmed to generate  
SRQ on errors, your program can use an SRQ service routine for decoding detected errors. The  
detectable errors are listed in Appendix C.  
Example 1. HP Vectra PC Controller Using Agilent 82335 Interface  
5
’-------------------- Merge SETUP.BAS here --------------------  
1000 MAX.ELEMENTS=2 :ACTUAL.ELEMENTS=0 :MAX.LENGTH=80 :ACT.LENGTH=0  
1005 DIM OUTPUTS(2) :CODES$=SPACE$(40)  
1010 ISC=7 :PS=706  
1015 ’  
1020 ’Set up the DC Source Interface for DOS driver  
1025 CALL IORESET (ISC)  
’Reset the interface  
1030 IF PCIB.ERR <> NOERR THEN ERROR PCIB.BASERR  
1035 TIMEOUT=3  
1040 CALL IOTIMEOUT (ISC, TIMEOUT)  
’Set timeout to 3 seconds  
1045 IF PCIB.ERR <> NOERR THEN ERROR PCIB.BASERR  
1050 CALL IOCLEAR (ISC)  
1055 IF PCIB.ERR <> NOERR THEN ERROR PCIB.BASERR  
1060 CALL IOREMOTE (ISC)  
mode  
’Clear the interface  
’Set dc source to remote  
1065 IF PCIB.ERR <> NOERR THEN ERROR PCIB.BASERR  
1070 ’  
1075 ’Program dc source to CV mode with following voltage and current  
1080 CODES$ = "VOLTAGE MAX;CURRENT MAX" :GOSUB 2000  
94  
 
Example Programs - D  
1085 ’  
1090 ’Query dc source outputs CURRENT?" :GOSUB 2000 :GOSUB 3000  
1100 VOUT = OUTPUTS(1)  
1105 IOUT = OUTPUTS(2)  
1110 PRINT "The output levels are "VOUT" Volts and "IOUT" Amps"  
1115 ’  
1120 ’Program triggered current level to value insufficient to maintain  
1125 ’supply within its CV operating characteristic  
1130 CODES$ = "CURR:TRIG MIN" :GOSUB 2000  
1135 ’  
1140 ’Set operation status mask to detect mode change from CV to CC  
1145 CODES$ = "STAT:OPER:ENAB 1024;PTR 1024"  
1150 ’  
:GOSUB 2000  
1155 ’Enable Status Byte OPER summary bit  
1160 CODES$ = "*SRE 128" :GOSUB 2000  
1165 ’  
1170 ’Arm trigger circuit and send trigger to dc source  
1175 CODES$ = "INITIATE:SEQUENCE1;TRIGGER"  
1180 ’  
:GOSUB 2000  
1185 ’Wait for supply to respond to trigger  
1190 FOR I= 1 to 100 :NEXT I  
1195 ’  
1200 ’Poll for interrupt caused by change to CC mode and print to  
screen  
1205 CALL IOSPOLL (PS,RESPONSE)  
1210 IF (RESPONSE AND 128) <> 128 THEN GOTO 1240 ’No OPER event to  
report  
1215 CODES$ = "STATUS:OPER:EVEN?" :GOSUB 2000 ’Query status oper  
register  
1220 CALL IOENTER (PS,OEVENT)  
1225 IF PCIB.ERR <> NOERR THEN ERROR PCIB.BASERR  
’Read back event bit  
1230 IF (OEVENT AND 1024) = 1024 THEN PRINT "Supply switched to CC  
mode."  
1240 ’Clear the status circuit  
1245 CODES$ = "*CLS" :GOSUB 2000  
1250 FOR I = 1 TO 100 :NEXT I  
’Wait for supply to  
clear  
1255 ’  
1260 ’Disable output and save present state in location 2  
1265 CODES$ = "OUTPUT OFF;*SAV 2" :GOSUB 2000  
1270 END  
1275 ’  
2000 ’Send command to dc source  
2005 LENGTH = LEN(CODES$)  
2010 CALL IOOUTPUTS (PS,CODES$,LENGTH)  
’Send command to  
’SETUP.BAS error  
interface  
2015 IF PCIB.ERR <> NOERR THEN ERROR PCIB.BASERR  
trap  
2020 RETURN  
2025 ’  
3000 ’Get data from dc source  
3005 CALL IOENTERA (PS,OUTPUTS(1),MAX.ELEMENTS,ACTUAL.ELEMENTS)  
3010 IF PCIB.ERR <> NOERR THEN ERROR PCIB.BASERR  
3015 RETURN  
95  
 
D - Example Programs  
Example 2. IBM Controller Using National Interface  
990 ’---------------------- Merge DECL.BAS here ------------------------  
1000 ’DC Source Variable = PS% ; Stand-Alone Address = 706  
1005 CODES$=SPACE$(50):MODE$=SPACE$(5):OEVENT$=SPACE$(20)  
1010 D$=SPACE$(60):OUTPUT$=SPACE$(40):BDNAME$="PS%"  
1015 DIM OUTPUT(2)  
1020 ’  
1025 ’Set up dc source interface for DOS driver  
1030 CALL IBFIND(BDNAME$,PS%)  
1035 IF PS%  
1040 CALL IBCLR(PS%)  
1045 ’  
1050 ’Program dc source to CV mode with following voltage and current  
1055 CODES$ = "VOLTAGE MAX;CURRENT MAX" :GOSUB 2000  
1060 ’  
1065 ’Query dc source outputs and print to screen  
1070 CODES$ = "MEASURE:VOLTAGE?;CURRENT?" :GOSUB 2000 :GOSUB 3000  
1075 VOUT = OUTPUT(1)  
1080 IOUT = OUTPUT(2)  
1085 PRINT"The programmed levels are "VOUT" Volts and "IOUT" Amps"  
1090 ’  
1095 ’Program triggered current level to value insufficient to maintain  
1100 ’supply within its CV operating characteristic  
1105 CODES$ = "CURR:TRIG MIN"  
1110 ’  
:GOSUB 2000  
1115 ’Set operation status mask to detect mode change from CV to CC  
1120 CODES$ = "STAT:OPER:ENAB 1024;PTR 1024" :GOSUB 2000  
1125 ’  
1130 ’Enable Status Byte OPER summary bit  
1135 CODES$ = "*SRE 128" :GOSUB 2000  
1140 ’  
1145 ’Arm trigger circuit and send trigger to dc source  
1150 CODES$ = "INITIATE:SEQUENCE1;TRIGGER" :GOSUB 2000  
1160 ’Wait for supply to respond to trigger  
1165 FOR I= 1 to 100 :NEXT I  
1170 ’  
1175 ’Poll for interrupt caused by change to CC mode and print to screen  
1180 SPOL%=0  
1185 CALL IBRSP(PS%,SPOL%)  
1190 IF (SPOL% AND 128) = 128 THEN POLL = 1 ’Set interrupt flag on  
OPER bit  
1195 IF POLL <> 1 THEN GOTO 1230  
service  
’No interrupt to  
1200 "CODES$ = "STAT:OPER:EVEN?" :GOSUB 2000 ’Query status oper  
register  
1205 CALL IBRD(PS%,OEVENT$)  
1210 IF IBSTA%  
’Read back event bit  
1215 OEVENT=VAL(OEVENT$)  
1220 IF (OEVENT AND 1024) = 1024 THEN PRINT "Supply switched to CC mode."  
96  
 
Example Programs - D  
1225 ’  
1230 ’Clear status circuit  
1235 CODES$="*CLS" :GOSUB 2000  
1240 FOR I=1 TO 50 :NEXT I  
1245 ’  
’Wait for supply to clear  
1250 ’Disable output and save present state to location 2  
1255 CODES$ = "OUTPUT OFF;*SAV 2" :GOSUB 2000  
1260 END  
1265 ’  
2000 ’Send command to dc source  
2005 CALL IBWRT(PS%,CODES$)  
2010 IF IBSTAT%  
2015 RETURN  
1250 ’Disable output and save present state to location 2  
1255 CODES$ = "OUTPUT OFF;*SAV 2" :GOSUB 2000  
1260 END  
1265 ’  
2000 ’Send command to dc source  
2005 CALL IBWRT(PS%,CODES$)  
2010 IF IBSTAT%  
2015 RETURN  
2020 ’  
2100 ’Error detection routine  
2105 PRINT "GPIB error. IBSTAT% = HEX$(IBSTAT%)  
2110 PRINT "  
2115 STOP  
2120 ’  
IBERR% = ";IBERR%" in line ";ERL  
3000 ’Get data from dc source  
3005 CALL IBRD(PS%,OUTPUT$)  
3010 IF IBSTA%  
3015 I=1  
’Parse data string  
’Get values  
3020 X=1  
3025 C=INSTR(I,OUTPUT$,";")  
3030 WHILE C <> 0  
3035 D$=MID$(OUTPUT$,I,C-I)  
3040 OUTPUT(X)=VAL(D$)  
3045 I=C+1  
3050 C=INSTR(I,OUTPUT$,";")  
3055 X=X+1  
3060 WEND  
3065 D$=RIGHT$(OUTPUT$,LEN(OUTPUT$)-(I-1))  
3070 OUTPUT(X)=VAL(D$)  
3075 OUTPUT$=SPACE$(40)  
3080 RETURN  
’Clear string  
97  
 
D - Example Programs  
Example 3. Controller Using BASIC  
1000 !Dc source at stand-alone address = 706  
1005 OPTION BASE 1  
1010 DIM Codes$[80],Response$[80],Mode$[32]  
1015 !  
1020 !Program dc source to CV mode with following voltage and current  
1025 OUTPUT 706;"VOLTAGE MAX;CURRENT MAX"  
1030 !  
1035 !Query dc source outputs and print to screen  
1040 OUTPUT 706;"MEASURE:VOLTAGE?;CURRENT?"  
levels  
!Query output  
1045 ENTER 706;Vout,Iout  
1050 PRINT "The output levels are ";Vout;" Volts and ";Iout" Amps"  
1055 !  
1060 !Program current triggered level to a value insufficient to  
maintain  
1065 !supply within its CV operating characteristic  
1070 OUTPUT 706;"CURR:TRIG MIN"  
1075 !  
1080 !Set operation status mask to detect mode change from CV to CC  
1085 OUTPUT 706;"STAT:OPER:ENAB 1024;PTR 1024"  
1090 !  
1095 !Enable Status Byte OPER summary bit  
1100 OUTPUT 706;"*SRE 128"  
1105 !  
1110 !Arm trigger circuit and send trigger to dc source  
1115 OUTPUT 706;"INITIATE:SEQUENCE1;TRIGGER"  
1130 !Poll for interrupt caused by change to CC mode and print to  
screen  
1135 Response=SPOLL(706)  
1140 IF NOT BIT (Response,7) THEN GOTO 1130  
!No OPER event to  
!Query status operation  
!Read back event  
report  
1145 OUTPUT 706;"STAT:OPER:EVEN?"  
register  
1150 ENTER 706;Oevent  
bit  
1155 IF BIT(Oevent,10) THEN PRINT "Supply switched to CC mode."  
1160 !  
1165 !Clear status  
1170 OUTPUT 706;"*CLS"  
1175 !  
1180 !Disable output and save present state in location 2  
1185 OUTPUT 706;"OUTPUT OFF;*SAV 2"  
1190 END  
98  
 
INDEX  
maximum, 20  
measurement range, 24  
measurements, 23  
—A—  
current measurement detector, 28, 52  
current measurement range, 52  
AARD, 16  
ABORT, 73  
ACDC, 52  
—D—  
—B—  
—C—  
DC, 52  
dc measurements, 23  
determining cause of interrupt, 35  
device clear, 17  
bus, 79  
DFI, 36  
DFI programming example, 37  
digital I/O port, 37  
discrete fault indicator, 36  
display commands, 68  
DISP, 68  
DISP MODE, 68  
DISP TEXT, 68  
DOS driver types, 93  
DTR-DSR, 11  
calibration commands, 44  
CAL CURR, 44  
CAL CURR MEAS AC, 44  
CAL CURR NEG, 44  
CAL DATA, 45  
CAL LEV, 45  
CAL PASS, 45  
CAL SAVE, 45  
CAL STAT, 46  
CAL VOLT, 46  
CAL VOLT PROT, 46  
calibration commands:CAL CURR MEAS LOWR ",  
44  
—E—  
either, 78  
enabling the output, 19  
error handling, 94  
error numbers, 89  
character strings, 16  
combine commands  
common commands, 14  
from different subsystems, 14  
root specifier, 14  
command completion, 17  
common command syntax, 43  
common commands, 61, 68  
*CLS, 64  
example  
controller using HP BASIC, 98  
DFI programming, 37  
HP Vectra with HP 82335 interface, 94  
IBM controller using National interface, 96  
programs, 93  
pulse measurement, 11, 30  
*ESE, 65  
*ESR?, 65  
*IDN?, 70  
*OPC, 65  
—F—  
*OPT?, 71  
*PSC, 66  
fault indicator  
discrete, 36  
*RCL, 71  
*RST, 71  
*SAV, 72  
remote inhibit, 36  
fetch commands, 23, 47  
FLT, 36  
*SRE, 66  
*STB?, 67  
*TRG, 79  
—G—  
*TST, 72  
*WAI, 67  
compatibility  
commands, 84  
errors, 86  
language, 83  
power-on settings, 83  
status model, 87  
conventions used in this guide, 12  
CRD, 16  
general information, 7  
generating measurement triggers, 26  
generating triggers, 22  
GP-IB  
command library for MS DOS, 8  
controller programming, 8  
IEEE Std for standard codes, 8  
IEEE Std for standard digital interface, 8  
references, 8  
current, 20  
99  
 
Index  
newline, 15  
message unit  
—H—  
hanning, 54  
separator, 15  
header, 15  
minimum measurements, 24  
monitoring both phases of status transition, 36  
moving among subsystems, 14  
MSS bit, 35  
long form, 15  
short form, 15  
history, 2  
HP 8235A driver, 93  
multiple measurements, 29  
HP BASIC controllers, 94  
HP-IB  
address, 10  
—N—  
capabilities of the dc source, 10  
triggers, 26  
National Instruments GPIB driver, 93  
negative, 78  
numerical data formats, 16  
—I—  
—O—  
INH, 36  
initialization, 19  
OCP, 20  
initiate commands, 73  
INIT CONT NAME, 73  
INIT CONT SEQ, 73  
INIT NAME, 73  
operation status group, 33  
optional header  
example, 14  
output commands, 55  
OUTP, 55  
INIT SEQ, 73  
initiating measurement trigger system, 25  
initiating output trigger system, 22  
internal, 79  
internal triggers, 26  
internally triggered measurements, 25  
OUTP DFI, 55  
OUTP DFI SOUR, 55  
OUTP PON STAT, 56  
OUTP PROT CLE, 56  
OUTP PROT DEL, 56  
OUTP REL, 57  
OUTP REL POL, 57  
OUTP RI MODE, 57  
output queue, 35  
output trigger system model, 21  
overcurrent protection, 20  
—L—  
language, 83  
language dictionary, 39  
latching, 57  
live, 57  
—P—  
—M—  
PON (power on) bit, 34  
positive, 78  
making measurements, 23  
MAV bit, 35  
post-event triggering, 30  
power-on conditions, 32  
power-on initialization, 19  
pre-event triggering, 30  
print date, 2  
maximum measurements, 24  
measure commands, 23, 47  
MEAS ARRay CURR?, 47  
MEAS ARRay VOLT?, 47  
MEAS CURR ACDC?, 48  
MEAS CURR HIGH?, 48  
MEAS CURR LOW?, 49  
MEAS CURR MAX?, 49  
MEAS CURR MIN?, 49  
MEAS CURR?, 48  
MEAS VOLT ACDC?, 50  
MEAS VOLT HIGH?, 50  
MEAS VOLT LOW?, 51  
MEAS VOLT MAX?, 51  
MEAS VOLT MIN?, 51  
MEAS VOLT?, 50  
program examples, 93  
programming parameters, 43  
programming status registers, 32  
programming the output, 19  
pulse measurement example, 11, 30  
pulse measurement queries, 28  
pulse waveforms, 28  
—Q—  
queries, 14  
query  
measurement trigger system model, 25  
measuring output pulses, 28  
message terminator, 15  
end or identify, 15  
indicator, 15  
questionable status group, 34  
100  
 
Index  
standard event status group, 34  
status bit configurations, 33  
status byte register, 34  
status commands, 61  
STAT OPER COND?, 61  
STAT OPER ENAB, 62  
STAT OPER NTR, 62  
STAT OPER PTR, 62  
STAT OPER?, 61  
—R—  
rectangular, 54  
remote inhibit, 36  
returning voltage or current data, 24  
RI, 36  
rms measurements, 24  
root specifier, 15  
RQS bit, 35  
RS-232  
STAT PRES, 61  
capabilities of the dc source, 10  
data format, 10, 12  
data terminator, 16  
flow control, 11  
STAT QUES COND?, 63  
STAT QUES ENAB, 63  
STAT QUES NTR, 64  
STAT QUES PTR, 64  
STAT QUES?, 63  
RTS-CTS, 11  
status model, 32  
subsystem commands syntax, 40  
suffixes, 16  
—S—  
system commands, 68  
SYST ERR?, 69  
safety guidelines, 2  
SCPI  
SYST LANG, 69, 83  
SYST LOC, 70  
SYST REM, 70  
SYST RWL, 70  
SYST VERS?, 69  
command completion, 17  
command syntax, 39  
command tree, 13  
common commands, 13  
conformance, 81  
system errors, 89  
data format, 16  
device clear, 17  
header path, 13  
message structure, 14  
message types, 14  
—T—  
trigger commands, 73  
message unit, 15  
TRIG, 74  
multiple commands, 13  
non-conformance, 81  
program message, 14  
references, 8  
response message, 14  
subsystem commands, 13, 39  
triggering nomenclature, 21, 25  
selecting measurement trigger source, 26  
sense commands, 47  
TRIG ACQ, 74  
TRIG ACQ COUN CURR, 75  
TRIG ACQ COUN VOLT, 75  
TRIG ACQ HYST CURR, 76  
TRIG ACQ HYST VOLT, 76  
TRIG ACQ LEV CURR, 77  
TRIG ACQ LEV VOLT, 77  
TRIG ACQ SLOP CURR, 78  
TRIG ACQ SLOP VOLT, 78  
TRIG ACQ SOUR, 79  
TRIG SEQ1 DEF, 79  
SENS CURR DET, 52  
SENS CURR RANG, 52  
SENS FUNC, 53  
TRIG SEQ2, 74  
SENS SWE OFFS POIN, 53  
SENS SWE POIN, 53  
SENS SWE TINT, 53  
SENS WIND, 54  
servicing operation status, 35  
servicing questionable status events, 35  
setting output trigger system, 21  
source commands, 55  
[SOUR] CURR, 58  
[SOUR] CURR PROT STAT, 58  
[SOUR] CURR TRIG, 58  
[SOUR] DIG DATA, 59  
[SOUR] DIG FUNC, 59  
[SOUR] VOLT, 59  
TRIG SEQ2 COUN CURR, 75  
TRIG SEQ2 COUN VOLT, 75  
TRIG SEQ2 DEF, 79  
TRIG SEQ2 HYST CURR, 76  
TRIG SEQ2 HYST VOLT, 76  
TRIG SEQ2 LEV CURR, 77  
TRIG SEQ2 LEV VOLT, 77  
TRIG SEQ2 SLOP CURR, 78  
TRIG SEQ2 SLOP VOLT, 78  
TRIG SEQ2 SOUR, 79  
TRIG SOUR, 74  
triggering output changes, 21  
triggers  
continuous, 22  
[SOUR] VOLT ALC BAND?, 60  
[SOUR] VOLT PROT, 60  
[SOUR] VOLT TRIG, 60  
SRD, 16  
single, 22  
types of SCPI commands, 13  
101  
 
Index  
—V—  
—W—  
varying voltage or current sampling, 29  
voltage, 20  
waiting for measurement results, 27  
maximum, 20  
measurements, 23  
—X—  
XON-XOFF, 11  
102  
 
Manual Updates  
The following updates have been made to this manual since the December 1998 printing  
indicated on the Printing History page.  
11/9/99  
Information about installing VXIplug&play Power Products Instrument Drivers has been included in the  
beginning of chapter 2.  
1/4/00  
All references to HP have been changed to Agilent.  
All references to HP-IB have been changed to GPIB.  
 

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