Tone Squelch Operation - Icom IC-7800 Instruction Manual

■ Tone squelch operation

[TONE] [F-4•DEF]
[F-1•Y] [F-2•Z] [AM/FM]
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
w Push [TONE] to turn the tone squelch function ON.
e Push [TONE] for 1 sec. to tone frequency set mode.
r Push [F-1•Y] or [F-2•Z] to select T-SQL TONE
t Rotate the main dial to select the desired tone
Main dial
y Push [EXIT/SET] to return to the previous indica-
u When the received signal includes a matching tone,
i Operate the transceiver in the normal way.
o To cancel the tone squelch, push [TONE] to clear
• Available tone frequencies
4-33
RECEIVE AND TRANSMIT
mode.
• "TSQL" appears
item.
squelch frequency.
• Push [F-4•DEF] for 1 sec. to select the default setting.
tion.
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].
"TSQL."
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
4
(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