APPENDIX
A6
• Color gradient information is not stored with the trace record waterfall data. When opening
previously recorded waterfalls, the waterfall is always displayed with the current color gradient
applied.
Receiver Overload – Waterfall Mode
The screenshots below demonstrate the receiver overload indications for the Trace Record Waterfall
during record mode and review mode. A receiver overload condition, which was described earlier, can
be fixed by applying input attenuation. Apply the smallest amount of attenuation that prevents the
overload condition. Begin by applying 10 dB of attenuation. If 10 dB of attenuation will not get rid of
the overload indicators and any false spurs, then try 20 dB, and then 30 dB.
The screenshot above shows an overload condition occurring while capturing a Trace Record Waterfall.
As a result of the overload, it appears that there are many signals in the displayed spectrum, however,
many of these are false spurs and are due to the receiver overload condition. Just as in Sweep Mode
and Live Raster Waterfall Mode, an overload condition is indicated by bars just above the frequency
spectrum. The color of the overload bar will correspond to the display color of the trace which has the
overload condition present.
If an overload condition is encountered while recording a Trace Record Waterfall, stop the record
session by selecting Back or pressing F6. While monitoring the suspect signal in Sweep Mode, apply the
Overload Indicator
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