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GPIB Operation 6-9

Case sensitivity

Common commands and SCPI commands are not case sensitive. You can use upper or lower

case and any case combination. Examples:

*RST = *rst

:DATA? = :data?

:STATus:PRESet = :status:preset

Long-form and short-form versions

A SCPI command word can be sent in its long-form or short-form version. The command

subsystem tables in Section 4 provide the long-form version. However, the short-form version

is indicated by upper case characters. Examples:

:STATus:PRESet long-form

:STAT:PRES short-form

:STATus:PRES long-form and short-form combination

Note that each command word must be in either long-form or short-form. For example,

:STATu:PRESe is illegal and will generate an error. The command will not be executed.

Short-form rules

Use the following rules to determine the short-form version of any SCPI command or

parameter:

• If the length of the word is four letters or less, no short form version exists. Example:

:auto = :auto

These rules apply to words that exceed four letters:

• If the fourth letter of the word is a vowel, delete it and all the letters after it. Example:

:dvmeter = :dvm

• If the fourth letter of the command word is a consonant, retain it but drop all the letters

after it. Example:

:format = :form

• If the command contains a question mark (?; query) or a non-optional number included in

the command word, you must include it in the short-form version. Example:

:function? = :func?

• Command words or characters that are enclosed in brackets ([]) are optional and need not

be included in the program message.

Keithley 2303 User Manual

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