Agilent Technologies N4962A Podręcznik Użytkownika Pobierz pdf (Strona 58)

Remote GPIB Interface

Serial BERT 12.5 Gb/s User Guide

5.2.1 Command Structure

The GPIB interface allows commands, which tell the instrument to take a

specific action, and queries, which ask the instrument to return information.

Commands are composed of syntactic elements:

• Header – the command name; if it ends with a question mark, the

command is a query.

• Delimiter – a space, colon (:), comma (,), or semi-colon (;) which breaks

the message into segments for the instrument to process.

• Link – a command sub-function. Not all commands have links.

• Argument – a quantity, quality, restriction, or limit associated with the

header or link.

Commands are case insensitive, although they are documented in an

uppercase and lowercase manner that indicates which minimum characters are

required to make the command. The commands can be shortened to the

minimum length illustrated by the uppercase letters in the documentation.

• The command

o :SOURce:PRBS:INVert ON

• Can be written in lowercase

o :source:prbs:invert on

• And it can be shortened

o :sour:prbs:inv ON

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Agilent Technologies N4962A Podręcznik Użytkownika Strona 58