34
9
SUBAUDIBLE TONES
■ Tone squelch
D 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 operating frequency.
•
Set the AF and squelch to the desired level as the normal operation.
w Set the desired subaudible tone in the set mode.
• See right for programming.
e Push [1•
TONE
] after [A•
FUNC
] is pushed.
• Repeat several times until “ ” appears when selecting CTCSS, or
“ ” appears when selecting DTCS.
r 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 and hold [SQL].
t Operate the transceiver in the normal way.
y To cancel the tone squelch, push [1•
TONE
] after [A•
FUNC
] is
pushed.
• Repeat several times until “ ” or “ ” disappears.
NOTE: The transceiver has 50 tone frequencies and conse-
quently their spacing is narrow compared to units having 38
tones. Therefore, some tone frequencies may receive interfer-
ence from adjacent tone frequencies.
To prevent interference from adjacent tone frequencies, using
the frequencies as in the following table, is recommended.
67.0
69.3
71.9
74.4
88.5
91.5
94.8
97.4
114.8
118.8
123.0
127.3
151.4
156.7
162.2
167.9
203.5
210.7
218.1
225.7
77.0
79.7
82.5
85.4
100.0
103.5
107.2
110.9
131.8
136.5
141.3
146.2
173.8
179.9
186.2
192.8
233.6
241.8
250.3
• Recommended tone frequencies
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