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

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Table of Contents

Safety Guidelines

Printing History

Table of Contents

1 - GENERAL INFORMATION

About this Guide

Documentation Summary

External References

GPIB References

SCPI References

2 - INTRODUCTION TO PROGRAMMING

VXIplug&play Power Products Instrument Drivers

Supported Applications

System Requirements

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

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

Enabling the Output

Output Voltage

Output Current

Triggering Output Changes

SCPI Triggering Nomenclature

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Output Trigger System Model

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

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?

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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

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

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System Commands

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

SCPI Confirmed Commands

Non-SCPI Commands

B - COMPATIBILITY LANGUAGE

Introduction

C - ERROR MESSAGES

Error Number List

D - EXAMPLE PROGRAMS

Introduction

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

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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.

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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

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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

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:

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.

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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.

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.

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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

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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.

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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.

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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:

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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.

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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)

MS (millisecond)

Common Multipliers

1E3

1E-3

1E-6

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.

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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.

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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

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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.

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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.

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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

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.

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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

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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?

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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

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:

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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.

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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.

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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?

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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.

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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

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.

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Programming the DC Source - 3

!Rev A.00.00

OPTION BASE 1

DIM Curr_array(100)

ASSIGN @Ps TO 705

ASSIGN @Ld TO 706

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

.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

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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

OCP

N.U.

OFF

5-8

N.U.

512

FLT

1024

Unreg

1024

11-13

N.U.

16384

MeasOvld

N.U.

SERVICE

REQUEST

ENABLE

STATUS BYTE

STANDARD EVENT STATUS

OUTPUT QUEUE

N.U.

0-2

EVENT

ENABLE

QUEUE

NOT

DATA

QUES

OPC

N.U.

QYE

DDE

EXE

CME

N.U.

EMPTY

MAV

ESB

MSS

OPER

128

PON

OPERATION STATUS

RQS

CONDITION

PTR/NTR

EVENT

ENABLE

SERVICE

REQUEST

GENERATION

CAL

N.U.

WTG

N.U.

1-4

6,7

256

N.U.

512

1024

CC+

CC-

N.U.

2048

12-15

Figure 3-7. DC Source Status Model

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Programming the DC Source - 3

Table 3-1. Bit Configurations of Status Registers

Bit

Signal

Meaning

Operation Status Group

CAL

WTG

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

OCP

The overvoltage protection has tripped

The overcurrent protection has tripped

The fuse is blown

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

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

QUES

MAV

ESB

MSS

RQS

OPER

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

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.

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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.

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.

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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

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

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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

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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.

FAULT/INHIBIT

FLT Output

INH Input

DIGITAL I/O

OUT 0

OUT 1

IN/OUT 2

Common

Bit Weight

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

!Rev A.00.00

ASSIGN @Ps TO 705

OUTPUT @Ps;"*RST"

! Sets supply to default values

! Turn on power supply output

! Program power supply voltage and current

OUTPUT @Ps;"OUTP ON"

OUTPUT @Ps;"VOLT 10;CURR .1"

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

! 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

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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.

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.

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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

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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

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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

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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

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

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

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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

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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>

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

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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

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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

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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

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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

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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]?

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

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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

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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.

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

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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

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

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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

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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

*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

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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

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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

*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

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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

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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

GND Output Lo

GND Output Hi

GND Intput Lo

GND Intput Hi

[SOURce]:DIGital:DATA[:VALue] <NRf>

0 to 7

Command Syntax

Parameters

*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)

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

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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)

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

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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

CC-

CC+

not

7-6

not

4-1

not

CAL

Bit Position

Bit Name

WTG

used

2048

1024

256

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

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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

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

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Language Dictionary - 4

Table 4-5. Bit Configuration of Questionable Status Registers

Bit Position

Bit Name

13-11

8-5

not

used

Meas

Ovld

not

used

Unreg

not

used

not

used

OCP

Bit Weight

16384

1024

512

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

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

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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

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

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

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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

DDE

QUE

OPC

PON

CME

EXE

Bit Weight

128

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

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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

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.

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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

OPER

MSS

ESB

MAV

QUES

(RQS)

Bit Weight

128

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?

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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

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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)

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

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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

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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

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4 - Language Dictionary

Table 4-8. *RST Settings

CAL:STAT

OFF

[SOUR:]CURR

10% of MAX*

DIG:DATA

[SOUR:]CURR:TRIG

10% of MAX*

DISP:STAT

[SOUR:]CURR:PROT:STAT

OFF

DISP:MODE

DISP:TEXT

NORM

[SOUR:]LIST:COUN

[SOUR:]VOLT

‘

INIT:CONT

OUTP

OUTP:DFI

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

MAX*

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

MAX*

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

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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)

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

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

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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

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

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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

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

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

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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

*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)

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

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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)

*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)

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

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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

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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

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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]

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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

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)

OCP

OUT

OVSET

SRQ

UNMASK

VSET

0 V

1 (ON)

MAX

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B - Compatibility Language

Table B-2. COMPatibility Commands

Description

Compatibility

Command

Similar SCPI

Command

ASTS?

This command reads the contents of the accumulated status

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

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

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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

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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.]

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Compatibility Language - B

STATUS

+CC

UNR

not used

FAULT

128

256

512

ERR

INH

-CC

1024

2048

FAST

NORM

SERIAL

POLL

ACCUMULATED

STATUS

FAU

MASKUS

PON

128

not used

256

512

+CC

1024

2048

UNR

RDY

ERR

RQS

128

not used

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

NORM FAST

-CC INH

ERR OC

not

used

UNR +CC CV

Bit Weight

2048

1024

512 256

128 64

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

ERR

RDY

FAU

not used RQS

not used not used PON

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.

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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

-100 thru -199

Command

-300 thru -399 or Device-dependent

1 thru 32767

200 thru -299

Execution

-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

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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

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

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

VDAC/IDAC selftest 1

VDAC/IDAC selftest 2

VDAC/IDAC selftest 3

VDAC/IDAC selftest 4

OVDAC selftest

Digital I/O selftest error

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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

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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).

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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

’-------------------- 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

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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

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

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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

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."

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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

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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?"

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

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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 ",

—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

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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

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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

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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

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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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