Agilent Technologies 8753ET Guia do Utilizador descarregar pdf (Página 315)

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Chapter 3 3-5

GPIB Programming

Analyzer Command Syntax

[terminator] Indicates the end of the command, enters the data, and switches the

active-entry area off. A semicolon (;) is the recommended terminator.

CAUTION Terminators are not necessary for the analyzer to interpret commands

correctly. But in the event of a syntax error, the analyzer will attempt to

recover at the next terminator. Therefore, it is recommended that each

command include a terminator. The analyzer also interprets line feeds and

GPIB end or identify (EOI) messages as terminators.

Syntax

Each command entry listed in Chapter 1 , “Alphabetical Command Reference,” includes

the proper syntax for the command. The conventions used are as follows:

<num> Required numerical data.

<choice1|choice2|…|choicen> An appendage that is part of the command. For example,

FORMAT<DOS|LIF> indicates that the actual commands are

FORMATDOS and FORMATLIF.

<$> Indicates a character string operand which must be

enclosed by double quotes.

| An either/or choice in appendages or optional data.

[ ] Optional data.

Syntax Example For example, the following is provided as the syntax for the ATT

command:

ATT<A|B|P1|P2><num>[DB]; or ATT<A|B|P1|P2>?;

If you are interested in the attenuation at port 1 of the analyzer, here are some of the

commands you could use:

ATTP120DB;

Sets the attenuation at port 1 to20 dB.

ATTP120; Also sets the attenuation at port 1 to 20 dB. (Note that the units,

“

,” are enclosed in square brackets, which designate optional

information.)

ATTP1?;

Queries the analyzer for the current attenuation at port 1.

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