Chapter 1 17
Introduction to Programming X-Series Applications
SCPI Measurement Commands
Measure Commands:
:MEASure:<measurement>[n]?
This is a fast single-command way to make a measurement using the factory default instrument
settings. These are the settings and units that conform to the Mode Setup settings (e.g. radio
standard) that you have currently selected.
• Stops the current measurement (if any) and sets up the instrument for the specified
measurement using the factory defaults
• Initiates the data acquisition for the measurement
• Blocks other SCPI communication, waiting until the measurement is complete before
returning results.
• If the function does averaging, it is turned on and the number of averages is set to 10, 25, or
50, depending upon the current measurement.
• After the data is valid it returns the scalar results, or the trace data, for the specified
measurement. The type of data returned may be defined by an [n] value that is sent with the
command.
The scalar measurement results will be returned if the optional [n] value is not included, or is
set to 1. If the [n] value is set to a value other than 1, the selected trace data results will be
returned. See each command for details of what types of scalar results or trace data results
are available.
ASCII is the default format for the data output. The binary data formats should be used for
handling large blocks of data since they are smaller and faster than the ASCII format. Refer
to the FORMat:DATA command for more information.
If you need to change some of the measurement parameters from the factory default settings you
can set up the measurement with the CONFigure command. Use the commands in the
SENSe:<measurement> and CALCulate:<measurement> subsystems to change the settings.
Then you can use the READ? command to initiate the measurement and query the results.
If you need to repeatedly make a given measurement with settings other than the factory
defaults, you can use the commands in the SENSe:<measurement> and
CALCulate:<measurement> subsystems to set up the measurement. Then use the READ?
command to initiate the measurement and query results.
Measurement settings persist if you initiate a different measurement and then return to a
previous one. Use READ:<measurement>? if you want to use those persistent settings. If you
want to go back to the default settings, use MEASure:<measurement>?.
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