Calculate/Compress Trace Data Query (Remote Command Only) - Keysight x-series User Reference Manual

Remote Command
Notes
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Calculate/Compress Trace Data Query (Remote Command Only)

Returns compressed data for the currently selected measurement and sub-opcode [n].
n = any valid sub-opcode for that measurement. See the MEASure:<measurement>? command description
of your specific measurement for information on the data that can be returned.
The data is returned in the current Y Axis Unit of the analyzer. The command is used with a sub-opcode <n>
(default=1) to specify the trace. With trace queries, it is best if the analyzer is not sweeping during the
query. Therefore, it is generally advisable to be in Single Sweep, or Update=Off.
This command is used to compress or decimate a long trace to extract and return only the desired data. A
typical example would be to acquire N frames of GSM data and return the mean power of the first burst in
each frame. The command can also be used to identify the best curve fit for the data.
Remote Command
Example
Notes
Initial S/W Revision
• BLOCk or block data - returns all the data points from the region of the trace data that you specify. For
example, it could be used to return the data points of an input signal over several timeslots, excluding
the portions of the trace data that you do not want. (This is x,y pairs for trace data and I,Q pairs for
complex data.)
EMI Receiver Mode Reference
:CALCulate:DATA[n]?
The return trace depends on the measurement.
In CALCulate:<meas>:DATA[n], n is any valid subopcode for the current measurement. It returns the
same data as the FETCh:<measurement>? query where <measurement> is the current
measurement.
Prior to A.02.00
:CALCulate:DATA<n>:COMPress? BLOCk | CFIT | MAXimum | MINimum | MEAN |
DMEan | RMS | RMSCubed | SAMPle | SDEViation | PPHase [,<soffset>
[,<length>[,<roffset>[,<rlimit>]]]]
To query the mean power of a set of GSM bursts:
Supply a signal that is a set of GSM bursts.
Select the IQ Waveform measurement (in IQ Analyzer Mode).
Set the sweep time to acquire at least one burst.
Set the triggers such that acquisition happens at a known position relative to a burst.
Then query the mean burst levels using, CALC:DATA2:COMP? MEAN, 24e–6, 526e–6 (These
parameter values correspond to GSM signals, where 526e–6 is the length of the burst in the slot and
you just want 1 burst.)
The command supports 5 parameters. Note that the last 4 (<soffset>,<length>,<roffset>,<rlimit>)
are optional. But these optional parameters must be entered in the specified order. For example, if
you want to specify <length>, then you must also specify <soffset>. See details below for a definition
of each of these parameters.
This command uses the data in the format specified by FORMat:DATA, returning either binary or
ASCII data.
Prior to A.02.00
12 Disturbance Analyzer Measurement
Meas
1051