WiNRADiO G69DDC User’s Guide
Squelch
The
Squelch tab
contains squelch-related controls:
The squelch control can be used to automatically mute the receiver when no
signal is being received. Without a signal, all you will usually hear is noise, so
squelch is provided to cut out the noise until a useful signal is received,
making the receiver more comfortable to use.
The WiNRADiO
Artemis
has five different types of squelch, suited for different
types of scenarios:
Level
squelch refers to the received signal strength, as indicated by the
S-meter.
If the signal strength is lower than the specified threshold, the
squelch will mute the receiver. For operator’s convenience, the current signal
strength level is shown next to the threshold setting (copied from the S-meter).
This is the most common form of squelch to use.
Noise
squelch determines the level of noise in the received demodulated
audio above which the squelch will mute the receiver. This is particularly useful
for the FM mode, where there is a considerable level of noise in the absence
of a useful signal. The current
Noise content
value is also shown next to the
corresponding control.
Voice
squelch determines the contents of voice frequencies in the spectrum of
the demodulated audio. If lower than the preset threshold, the receiver will be
muted. The voice frequencies content of the currently received signal is also
shown next to the corresponding control.
CTCSS
(Continuous Tone Coded Squelch System)
defines a particular
CTCSS
code which, when received, will open the squelch. The currently
received
CTCSS
code is shown in the demodulator spectrum display. A
question mark is shown if there is no known CTCSS code currently received.
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