Spectrum/ Waterfall Display - XIEGU G90 Operation Manual

In the Center frequency mode (see above) you can move the center of the
bandpass filter around the current frequency to reduce interference from
adjacent signals either above or below your opera�ng frequency.
Properly adjus�ng the filter parameters can greatly improve the
performance of the receiver as well as its sensi�vity and signal to noise
ra�o.
In CW mode, the digital filter can be made as narrow as 50Hz but there will
be obvious deteriora�on of the resul�ng audio at such an extremely narrow
se�ng. 300-500 Hz is normally ideal.

Spectrum/ Waterfall Display

The G90/S radio can display the radio spectrum and waterfall diagrams of
received signals and you can quickly observe whether there is a signal on the
desired frequency of opera�on. You can also easily iden�fy a clear frequency
to QSY (move freq.) to in case there is QRM (interference) occurring on the
frequency you are currently using.
Spectrum display bandwidth is 48kHz
The spectrum signal strength value displays with an accuracy of ±2dB
The sensi�vity of the spectrum display (scale) can be adjusted for the
condi�ons of the band you are opera�ng on. If the scale is set too high, very
strong signals may have their signal peaks cut off. You may adjust the scale by
doing the following:
1. Press the [FUNC] bu�on momentarily and then the lock bu�on, to enter the
SCALE reference level se�ng.
2.
Rotate the main tuning knob to adjust the SCALE value un�l the display
sensi�vity is appropriate.
3.
Press the main tuning knob in momentarily to save and exit the se�ng
screen.
The SCALE reference values gradually increase from 1 to 10. When strong
signals are observed, scale values need to be lowered. When looking at
weak signals, the SCALE values can be increased. Generally, bands under 14
MHz will need less sensi�ve se�ngs.
The SCALE value in each frequency range can be set independently.
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