Spectrum Analyzer Mode Key Descriptions
Spectrum Analyzer Mode Functions
N O T E
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
CPEAK S E A R C H )
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 ( P E A K S E A R C H ]
accesses the same softkeys that are available when
(PEAK SEARCH) is pressed (see the key description for
QJEAK S E A R C H ] 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
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.
