42
4
RECEIVE AND TRANSMIT
2001 NEW
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
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
A G C D U P C M P T O N S C P
T O N S C N 8 8 . 5 H z
T S Q L T o n e
Push [F4] for 1 sec.
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
IC-7400.qxd 02.4.2 11:35 Page 42
