User`s guide

108 N9320A Spectrum Analyzer
4 Key Reference
Peak Excursion Sets the minimum amplitude variation of
signals that the marker identifies as a peak.
If a value of 10 dB is selected, the marker
moves only to peaks that rise and fall more
than 10 dB above the peak threshold value.
When the peak excursion is 6 dB or higher,
NOTE
Two signal peaks, which are so close together that the amplitude drop
between them is less than the peak-excursion value, are not
recognized as two peaks. A signal peak is recognized only if it has a
peak excursion drop above the noise floor, on both sides of the signal.
the marker- peak does not recognize signals
less than peak- excursion value above the
noise floor. To correct this, when measuring
signals near the noise floor, reduce the
excursion value. To prevent the marker from
identifying noise as signals, reduce the noise
floor variance less than the peak- excursion
value by reducing the video bandwidth or by
using video averaging.
Key access: > More >Search Criteria
Peak
Threshold
Sets the minimum amplitude that the marker
can identify as
a peak. For example, if set to
–90 dBm, the marker moves only to peaks
that rise and fall more than the peak
excursion above –90 dBm. Only functional
when in Excursion and Threshold marker
mode.
Key access: > More > Search Criteria
Threshold
Hidden
Hides the threshold line from being displayed
on the screen.
Key access: > More > Search Criteria
Peak Search
Typ e
Selects the peak search mode.
Key access: > More > Search Criteria
Peak
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Peak
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Peak
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Peak
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