Start/Halt Pause/Resume Memory Scan (P4)
Squelch Notes:
Unlike HF receivers, VHF/UHF receivers need noise squelch, window squelch and signal
level squelch. It is not sufficient to rely on carrier to noise ratio alone to determine if
signal is present in a channel.
Set Signal Strength Squelch (S1)
Format:
(Set command)
*S1LLL<cr>
(Get command)
?S1<cr>
Response: S1LLL<cr>
Definitions:
LLL—the level that will be compared to the current signal strength level used to determine if a
valid signal is present. If the current signal strength is found to be less than this value, the
signal is found to be invalid and the audio will be muted. Valid ranges 0-127. Leading zero’s
can be omitted.
Format:
(Set command)
*P4X<cr>
(Get command)
(Not applicable)
Definitions:
X
= <S> start scanning for activity on pre-programmed memory channels. The receiver will use the specified
channel range via command P4. If no range has been specified using command P4, the valid channel range
will be from 0-999.
NOTE: if no channels are found to be programmed, an error will be returned when the “S” is
transmitted to start scanning.
NOTE: the time between scanning uses the time set in the Gaze Time (T3) command.
<H> halts or stops program scanning and returns to manual mode. The receiver will remain tuned to
the channel it is currently set to when receiving this command.
<P> pauses channel scanning if currently in scan mode. Ignored if receiver not currently in scan
mode.
<R> resumes channel scanning if currently in “paused” mode. Ignores this command if not currently
in paused mode
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