WiNRADiO G33DDC HF Receiver
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To adjust the level squelch control, first tune to an unoccupied frequency that
produces only noise. Increase the squelch until the receiver is muted. You will
see the red-colored segment of the S-meter growing until it gets higher than
the current S-meter value. At that moment the receiver will be muted and the
word
“
squelched
” will be displayed on the S-meter. Add a few dB extra to
allow a margin for background noise fluctuation on the band. Now when you
tune to an occupied frequency, if its signal strength is higher than the squelch
level, the receiver will be unmuted.
To adjust the noise squelch control, first tune to an unoccupied frequency that
produces only noise. Note the
Noise content
value indicated next to the
associated control. Then tune to an occupied frequency where there is a
useful signal, and note the noise content value again. Then set the noise
threshold somewhere between these extreme values. Note that the noise
squelch is particularly effective in the FM mode and its values also depend on
the demodulator bandwidth setting.
The adjustment procedure for the voice squelch is similar: Tune to an
unoccupied channel first, then an active voice channel, note the corresponding
Voice content
values, and set the voice threshold between these two
extremes.
To enable the squelch action, click the
Enable
button. Clicking it again
disables it.
It is easy to forget that squelch is active. If the receiver doesn’t seem to
be operational (no sound from the speaker), check the squelch and mute
settings first.
Gain
The
Gain tab
contains several controls to adjust various gain-related settings
of the receiver. The gain is a software parameter, and can be set separately
for each of the three virtual receivers.
