Icom IC-7400 Instruction Manual page 55

D D Tone squelch operation
Tone squelch operation is a method of communica-
tions using selective calling. Only received signals hav-
ing a matching tone will open the squelch. Before
communicating using tone squelch, all members of
your party must agree on the tone squelch frequency
to use.
q Push [AM/FM] to select FM mode.
w Push [MENU] several times to select
e Push [F4
] several times to turn the tone
squelch function ON.
• "TSQL" appears
r Push [F4
] for 1 sec. to enter tone frequency
set mode.
t Push [F1
] several times until
appears, if necessary.
y Rotate the tuning dial to select the desired tone
squelch frequency.
• Push [F3] for 1 sec. to select the default frequency.
u Push [MENU] to return to
i Communicate in the usual manner.
• Available tone squelch 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
RECEIVE AND TRANSMIT
F 1 F 2 F 3
Push [F4] for 1 sec.
F 1 F 2 F 3
4
F 4 F 5
F 4 F 5
42