Agilent Technologies PSG Manuál s instrukcemi stáhnout pdf (Strana 153)

Command Reference

SCPI Basics

Chapter 4 139

SCPI Basics

This section describes the general use of the Standard Commands for Programmable

Instruments (SCPI) language for the PSG Family of signal generators. It is not intended to

teach you everything about the SCPI language; the SCPI Consortium or IEEE can provide

that level of detailed information. For a list of the specific commands available for the signal

generator, refer to the Table of Contents.

For additional information, refer to the following publications:

• IEEE Standard 488.1-1987, IEEE Standard Digital Interface for Programmable

Instrumentation. New York, NY, 1998.

• IEEE Standard 488.2-1992, IEEE Standard Codes, Formats, Protocols and Command

Commands for Use with ANSI/IEEE Standard 488.1-1987. New York, NY, 1998.

Common Terms

The following terms are used throughout the remainder of this section:

Command A command is an instruction in SCPI consisting of mnemonics

(keywords), parameters (arguments), and punctuation. You

combine commands to form messages that control instruments.

Controller A controller is any device used to control the signal generator, for

example a computer or another instrument.

Event Command Some commands are events and cannot be queried. An event has

no corresponding setting. It initiates an action at a particular

time.

Program Message A program message is a combination of one or more properly

formatted commands. Program messages are sent by the

controller to the signal generator.

Query A query is a special type of command used to instruct the signal

generator to make response data available to the controller. A

query ends with a question mark. You can query any command

value that you set.

Response Message A response message is a collection of data in specific SCPI

formats sent from the signal generator to the controller.

Response messages tell the controller about the internal state of

the signal generator.

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