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PEL-3021
COMMNAND OVERVIEW
17
Command types
There are a number of different instrument
commands and queries. A command sends
instructions or data to the unit and a query
receives data or status information from the
unit.
commands and queries. A command sends
instructions or data to the unit and a query
receives data or status information from the
unit.
Command types
Simple
A single command
with/without a parameter
with/without a parameter
Example
:CONFigure:RESPonse MAX
Query
A query is a simple or
compound command
followed by a question mark
(?). A parameter (data) is
returned.
compound command
followed by a question mark
(?). A parameter (data) is
returned.
Example
:CONFigure:RESPonse?
Compound
Two or more commands on
the same command line.
Compound commands are
separated with either a semi-
colon (;) or a semi-colon and a
colon (;:).
the same command line.
Compound commands are
separated with either a semi-
colon (;) or a semi-colon and a
colon (;:).
A semi-colon is used to join
two related commands, with
the caveat that the last
command must begin at the
last node of the first
command.
two related commands, with
the caveat that the last
command must begin at the
last node of the first
command.
A semi-colon and colon are
used to combine two
commands from different
used to combine two
commands from different