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4
RECEIVE AND TRANSMIT
2001 NEW
DD
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 M1.
e Push [F4 TON] several times to turn the tone
squelch function ON.
•“TSQL appears
r Push [F4 TONE] for 1 sec. to enter tone frequency
set mode.
t Push [F1 TON] several times until TSQL Tone
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 M1.
i Communicate in the usual manner.
Available tone squelch frequencies (Unit: Hz)
F 1
F 2 F 3 F 4 F 5
F 1
F 2 F 3 F 4 F 5
AGC
DUP
CMP
TON
SCP
TON
SCN
88.5Hz
TSQL
Tone
Push [F4] for 1 sec.
67.0
69.3
71.9
74.4
77.0
79.7
82.5
085.4
088.5
091.5
094.8
097.4
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
IC-7400.qxd 02.4.2 11:35 Page 42
55


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