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Spectrum Analyzer Mode Key Descriptions
Spectrum Analyzer Mode Functions
NOTE
When a peak has a lump on its skirt that is the peak-excursion value above the threshold, the lump is
considered a peak in its own right only if it has a peak excursion drop on both sides. Two peaks that
are so close that only a valley divides them are not differentiated if the valley is not the peak-excursion
value deep.
Peak
Menu
When the peak excursion value is less than 6
dB,
the
marker-peaking functions may not recognize signals less
than 6
dB
above the noise floor. To correct this, when
measuring signals near the noise floor, the excursion value
can be reduced even further. To prevent the marker from
identifying noise as signals, reduce the noise floor variance
to a value less than the peak-excursion value by reducing
the video bandwidth or by using video averaging.
Front-Panel Key Access (PEAK SEARCH]
accesses the same softkeys that are available when
(PEAK
SEARCH)
is pressed (see the key description for
QJEAK
SEARCH] below). Pressing Peak Menu instead of
[PEAK SEARCH] allows you to use the peak-search functions
without initiating a new peak search.
Front-Panel Key Access
c-j
CPEAK
SEARCH)
automatically places a marker on the highest amplitude of a
trace, displays the marker’s amplitude and frequency. It also
accesses the menus of marker peak functions including the
peak table functions.
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