R&S ESU Series Operating Manual page 198

R&S ESU
Fig. 4.8 Examples of level measurement with different settings of PEAK EXCURSION
The following table lists the signals as indicated by marker numbers in the diagram
above, as well as the minimum of the amplitude decrease to both sides of the signal:
signal #
1
2
3
4
With 40 dB peak excursion, NEXT PEAK, NEXT PEAK RIGHT and NEXT PEAK
LEFT will not find any signal, as the signal level does not decrease by more than 30
dB to either side of any signal.
Order of signals detected:
PEAK:
NEXT PEAK:
or
PEAK:
NEXT PEAK LEFT:
NEXT PEAK RIGHT: signal 1 (no further signal detected)
With 20 dB peak excursion, NEXT PEAK and NEXT PEAK RIGHT will also detect
signal 2, as the signal level decreases at least by 29.85 dB to either side of this sig-
nal, which is now greater than the peak excursion.
Operating Manual 1302.6163.12 - 03
min. amplitude decrease to both sides of the signal
30 dB
29.85 dB
7 dB
7 dB
signal 1
signal 1 (no further signal detected)
signal 1
signal 1 (no further signal detected)
Instrument Functions
Analyzer Mode
4.167