Icom IC-7700 - Manual (Page 86)

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Tone squelch operation
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.
• “ ” appears
e Push and hold [TONE] for 1 sec. 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.
• Push and hold [F-4•DEF] for 1 sec. to select the default
setting.
y Push to return to the previous indication.
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 (unit: Hz)
EXIT/SET
TSQL
Main dial
F-4
DEF
TONE
F-1
∫
F-2
√ AM/FM
4
RECEIVE AND TRANSMIT
67.0
69.3
71.9
74.4
77.0
79.7
82.5 0 85.4
0 88.5
0 91.5
0 94.8
0 97.4
100.0
103.5
107.2
110.9
114.8
118.8
123.0
127.3
131.8
136.5
141.3
146.2
151.4
156.7
159.8
162.2 165.5
167.9
171.3
173.8
177.3
179.9
183.5 186.2
189.9
192.8
196.6
199.5
203.5
206.5 210.7
218.1
225.7
229.1
233.6
241.8
250.3 254.1