R&S FSW Series, Руководство пользователя

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Remote Commands
R&S
®
FSW
1144 User Manual 1173.9411.02 ─ 43
Table 14-7: 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.)
For SEM or Spurious Emission measurement results, the x-values should be queried as well, as they are
not equidistant (see
TRACe<n>[:DATA]:X?
on page 1145).
Table 14-8: 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 14-9: 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
.
For details on the returned values see the
TRAC:DATA? <TRACE...>
command.
Suffix:
<n>
.
Window
Query parameters:
<Trace> TRACE1 | TRACE2 | TRACE3 | TRACE4 | TRACE5 | TRACE6
<OffsSwPoint> The offset in sweep points related to the start of the measure-
ment at which data retrieval is to start.
<NoOfSwPoints> Number of sweep points to be retrieved from the trace.
Return values:
<SweepPointValues>
Analyzing Measurements (Basics)