Common Analysis and Display Functions
R&S
®
FSMR3000
209
User Manual 1179.0116.02 ─ 02
Figure 8-8: 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 #
Min. amplitude decrease to either side of the signal
1
80 dB
2
80 dB
3
55 dB
4
39 dB
5
32 dB
In order to eliminate the smaller peaks M3, M4 and M5 in the example above, a peak
excursion of at least 60
dB is required. In this case, the amplitude must rise at least
60
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 measurement. 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 measurement 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
Marker Usage