R&S FSW-K7 User Manual page 150

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R&S FSW-K7
Figure 6-1: Trace example
The following table lists the peaks as indicated by the marker numbers in the diagram
above, as well as the minimum decrease in amplitude to either side of the peak:
Marker #
1
2
3
4
5
In order to eliminate the smaller peaks M3,M4 and M5 in the example above, a peak
excursion of at least 20 dB is required. In this case, the amplitude must rise at least 20
dB before falling again before a peak is detected.
Marker peak list
The marker peak list determines the frequencies and levels of peaks in the spectrum. It
is updated automatically after each sweep. How many peaks are displayed can be
defined, as well as the sort order. In addition, the detected peaks can be indicated in
the diagram. The peak list can also be exported to a file for analysis in an external
application.
Automatic peak search
A peak search can be repeated automatically after each sweep in order to keep the
maximum value as the reference point for a phase noise measurement. This is useful
to track a drifting source. The delta marker 2, which shows the phase noise measure-
ment result, keeps the delta frequency value. Therefore the phase noise measurement
leads to reliable results in a certain offset although the source is drifting.
User Manual 1173.9240.02 ─ 23
Working with Markers in the R&S FSW Analog Demodulation application
Min. amplitude decrease to either side of the signal
30 dB
29.85 dB
20 dB
10 dB
18 dB
Analysis
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