13-8 :MEASure Subsystem Chapter 13 — LTE Commands
13-16 PN: 10580-00341 Rev. C MS2720T PM
13-8 :MEASure Subsystem
These commands take the instrument from its current state, enable the specified
measurement and put the instrument into single sweep mode. They correct any parameters
that are invalid given the new measurement state such that a valid measurement can take
place. Other settings may be changed. Refer to the documentation of CONFigure for each
measurement. They then initiate the measurement. When the measurement is complete, they
return the result.
To make a measurement with settings other than the “default” measurement settings applied
by CONFigure, do the following:
• Send the appropriate CONFigure command to set the desired measurement.
• Modify the settings as required.
• Send the appropriate READ command to measure and return the result.
To get the current measurement data, use the appropriate FETCh command.
:MEAsure:DEMod:AVErage?
Title: Measure Constellation with Frequency Error Averaging
Description: Triggers a series of new Constellation measurements and returns the
results. The number of measurements is set by the
[:SENSe]AVErage:FERRor:COUNt n command.
Although ‘n’ measurements are taken, only a single result string
returns. This will be the measured results of the last measurement in
the set, except for frequency error, which is averaged over the entire ‘n’
measurements.
Note: If n is large, then an appropriately large value for the time-out of
the SCPI interface is required.
Data is returned as 9 comma-delimited values: EVM (rms) in %, EVM
(pk) in %,
Ref Signal (RS) Power in dBm, Sync Signal (SS) Power in dBm, Carrier
Frequency
in MHz, Freq Error in Hz, Freq Error in ppm, the Cell ID, and the
number of measurements average for Frequency Error. “--” is returned
for each data that is not valid at that instance.
Front Panel
Access: Measurements, Modulation, Constellation
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