Rohde & Schwarz FSWP Series - Page 101

Remote Commands for the I/Q Analyzer
R&S
®
FSWP
101User Manual 1177.5856.02 ─ 07
For the I/Q Vector result display, the I and Q values for each
trace point are returned (1001 pairs of I and Q values).
Example:
TRAC? TRACE3
Queries the data of trace 3.
Manual operation: See " Magnitude " on page 14
See " Spectrum " on page 15
See " I/Q-Vector " on page 16
See " Real/Imag (I/Q) " on page 16
Table 8-3: Return values for TRACE1 to TRACE6 parameter
The trace data consists of a list of power levels that have been measured. The number of power levels in
the list depends on the currently selected number of sweep points. The unit depends on the measurement
and on the unit you have currently set.
If you are measuring with the auto peak detector, the command returns positive peak values only. (To
retrieve negative peak values, define a second trace with a negative peak detector.)
Table 8-4: Return values for LIST parameter
For each peak, the command returns 11 values in the following order:
<No>,<StartFreq>,<StopFreq>,<RBW>,<PeakFreq>,<PowerAbs>,<PowerRel>,<PowerDelta>,<Limit-
Check>,<Unused1>,<Unused2>
●
<No>: range number
●
<StartFreq>,<StopFreq>: start and stop frequency of the range
●
<RBW>: resolution bandwidth
●
<PeakFreq>: frequency of the peak in a range
●
<PowerAbs>: absolute power of the peak in dBm
●
<PowerRel>: power of the peak in relation to the channel power in dBc
●
<PowerDelta>: distance from the peak to the limit line in dB, positive values indicate a failed limit
check
●
<LimitCheck>: state of the limit check (0 = PASS, 1 = FAIL)
●
<Unused1>,<Unused2>: reserved (0.0)
Table 8-5: Return values for SPECtrogram parameter
For every frame in the spectrogram, the command returns the power levels that have been measured, one
for each sweep point. The number of frames depends on the size of the history depth. The power level
depends on the unit you have currently set.
TRACe<n>[:DATA]:MEMory? <Trace>,<OffsSwPoint>,<NoOfSwPoints>
This command queries the previously captured trace data for the specified trace from
the memory. As an offset and number of sweep points to be retrieved can be specified,
the trace data can be retrieved in smaller portions, making the command faster than
the TRAC:DATA? command. This is useful if only specific parts of the trace data are of
interest.
If no parameters are specified with the command, the entire trace data is retrieved; in
this case, the command returns the same results as TRAC:DATA? TRACE1.
Suffix:
<n>
.
Window
Query parameters:
<Trace> TRACE1 | TRACE2 | TRACE3 | TRACE4 | TRACE5 | TRACE6
Retrieving Results