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Introduction to SCPI 1

U2761A Programmer’s Reference 5

Using “ * ” commands

Commands starting with a “*” are called common commands. They are

required to perform the identical function for all instruments that are

compliant with the IEEE- 488.2 interface standard.

The IEEE- 488.2 standard defines a set of common commands that perform

functions such as reset, self- test, and status operations. Common

commands always begin with an asterisk (*), are three characters in

length, and may include one or more parameters.

Syntax conventions

The following SCPI conventions are used throughout this guide.

Braces “{ }”

Braces “{ }” enclose the parameter choices for a given command string.

For example, the syntax statement below shows that you need to select an

output function:

[SOURce:]FUNCtion[:SHAPe] {SINusoid|SQUare|RAMP|PULSe|DC|USER}

The braces are not sent with the command string. A vertical bar “|”

separates multiple parameter choices for a given command string.

Triangle brackets “< >”

Triangle brackets “< >” indicate that you must specify a value for the

enclosed parameter. For example, the syntax statement below shows the

<value> parameter enclosed in triangle brackets:

CALibration:VALue <value>

The brackets are not sent with the command string. You must specify a

value for the parameter:

CALibration:VALue 1E+7

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Agilent Technologies AGILENT U2761A Manuale di Servizio Pagina 13