Subaudible Tone Operation; Tone Squelch Operation - Icom IC-Q7A Instruction Manual

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SUBAUDIBLE TONE OPERATION

Tone squelch operation

D Operation
The tone squelch opens only when receiving a signal con-
taining a matching subaudible tone. You can silently wait for
calls from group members using the same tone.
q Set the operating frequency.
w Set the desired CTCSS tone in set mode.
• See right for programming.
e Push [V/M] for 2 sec. to enter set mode.
r Rotate [DIAL] until "T/TSQL" appears.
• "T/SQL" disappears after 1 sec. and "tO" appears.
t While pushing [FUNC], rotate [DIAL] to select "TSQL."
y Push [V/M] to exit set mode and start the tone squelch.
u When the received signal includes a matching tone,
squelch opens and the signal can be heard.
• When the received signal's tone does
not match, tone squelch does not
open, however, the S-indicator shows
signal strength.
• To open the squelch manually, push
and hold [SQL].
i Operate the transceiver in the nor-
mal way.
o To cancel the tone squelch, repeat
steps e–y as described above
and select "OFF" in step t.
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Store subaudible tone frequencies and tone squelch ON/OFF
settings in memories (call) for easy recall.
D Setting subaudible tones for tone squelch
Separate tone frequencies can be set for tone squelch oper-
ation than for repeater operation (the same range of tones is
available—see p. 23). Like repeater tones, these are set in set
mode.
q Select VFO mode or desired memory channel to be pro-
w Push [V/M] for 2 sec. to enter set mode.
e Rotate [DIAL] until "C TONE" (CTCSS tone) appears.
r While pushing [FUNC], rotate [DIAL] to select the desired
t Push [V/M] to exit set mode.
Tone function set mode
Tone squelch is ON.
CONVENIENT
operation (CTCSS tones)
grammed.
• "C TONE" disappears after 1 sec. and "Ct" appears.
CTCSS tone.
• Each operating band and each memory channel have indepen-
dent settings.
The transceiver has 50 tone frequencies and consequently
their spacing is narrow compared with units having 38
tones. Therefore, some tone frequencies may receive in-
terference from adjacent tone frequencies.