EXFO IQS-600 Series, User Manual

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Using IQS Products in an Automated Test Environment
Integrated Qualification System
191
SCPI Command Structure

You can build program messages allowing you to send more than one
command at a time. Sometimes, you can omit the leading
<
mnemonic > path to simplify the program messages and speed up
the search time (the parser saves the last position in the command
tree).
Paths cannot be omitted in all cases. The example below would cause
an error.
IEEE 488.2 required commands or queries (beginning with a *) that are
part of the program message have no effect on the paths.
Example:
:system:version?;*idn?;:system:error:next? is equivalent to
:system:version?;*idn?;error:next?
Note:
Omitting the leading <
mnemonic
> path is only possible when you have
more than one command or query in the program message that you send.
:system:version?;:system:error:next?
:system:version?;error:next?
other< mnemonic > path
< mnemonic > path
omitted –also correct
saved < mnemonic > path
:system:error:next?;:system:version?
:system:error:next?;version?
Incorrect; :version? is not in
the :system:error branch
other< mnemonic > path saved < mnemonic > path