Tone Squelch Operation - Icom IC-7800 Instruction Manual

■ Tone squelch operation

[F-4•DEF]
[TONE]
[F-1•Y] [F-2•Z]
[AM/FM] Main dial
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RECEIVE AND TRANSMIT
The tone squelch opens only when receiving a signal
containing a matching subaudible tone. You can silently
wait for calls from group members using the same tone.
q Set the desired frequency band and select FM
mode.
w Push [TONE] to turn the tone squelch function ON.
• "TSQL" appears
e Hold down [TONE] for 1 second to tone frequency
set mode.
r Push [F-1•Y] or [F-2•Z] to select T-SQL TONE
item.
t Rotate the main dial to select the desired tone
squelch frequency.
• Hold down [F-4•DEF] for 1 second to select the default
setting.
y Push [EXIT/SET] to return to the previous indica-
tion.
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 [XFC].
i Operate the transceiver in the normal way.
o To cancel the tone squelch, push [TONE] to clear
"TSQL."
• Available tone frequencies
67.0 085.4 107.2 136.5
69.3 088.5 110.9 141.3
71.9 091.5 114.8 146.2
74.4 094.8 118.8 151.4
77.0 097.4 123.0 156.7
79.7 100.0 127.3 159.8
82.5 103.5 131.8 162.2
(unit: Hz)
165.5 186.2 210.7 254.1
167.9 189.9 218.1
171.3 192.8 225.7
173.8 196.6 229.1
177.3 199.5 233.6
179.9 203.5 241.8
183.5 206.5 250.3
4