Technical data

Measure (Spectrum Analysis Mode) 14
Agilent N8201A Performance Downconverter Synthetic Instrument Module, 250 kHz to 26.5 GHz 235
Figure 2 Measurement Group of 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 (that is, 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.
• 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. Older versions of Spectrum Analysis and Phase Noise mode
measurements only use ASCII.) 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. See Figure 2.
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>?.
Configure Commands:
:CONFigure:<measurement>
This command stops the current measurement (if any) and sets up the instrument for the specified measurement
using the factory default instrument settings. It sets the instrument to single measurement mode but should not
initiate the taking of measurement data unless INIT:CONTinuous is ON. After you change any measurement
settings, the READ command can be used to initiate a measurement without changing the settings back to their
defaults. In Spectrum Analysis mode the CONFigure command also turns the averaging function on and sets the
number of averages to 10 for all measurements.
The CONFigure? query returns the current measurement name.