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For wide-band signals, the wider the resolution bandwidth or
demodulation bandwidth is set, the larger the readout will be.
Also, the detection method of SPECTRUM and LEVEL can be set separately.
If then, the readout will be different.
6.2 Why the squelch can be turned on when the frequency
spectrum is lower than the threshold of the squelch level?
The reason is the same as 6.1. The basis for level squelch is level(field
intensity) readout. Spectral resolution bandwidth is usually narrower than
demodulation bandwidth, thus the signal curve will often below the level value.
Since the squelch level line on the screen is drawn by the level of
demodulator, the level in demodulator will be higher than RBW value.there
will be a situation where the spectrum is lower than the prompt line but the
squelch is still turned on.
The wider the demodulation bandwidth, the greater this difference. When
setting the squelch level, please pay attention to the level readout.
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