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9
SUBAUDIBLE TONE OPERATION
Tone squelch operation
D Operation
The tone squelch opens only when receiving a signal con-
taining a matching subaudible tone. You can silently wait for
calls from group members using the same tone.
q Assign the main band to the desired display with [MAIN].
w Set the operating frequency.
e Set the desired CTCSS tone in set mode.
• See right for programming.
r Push [TONE] several times until "T SQL" appears.
t 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].
y Operate the transceiver in the normal way.
u To cancel the tone squelch, push [TONE].
NOTE: The transceiver has 50 tone frequencies and con-
sequently their spacing is narrow compared with units hav-
ing 38 tones. Therefore, some tone frequencies may
receive interference from adjacent tone frequencies.
CONVENIENT
Store subaudible tone frequencies and tone squelch ON/OFF
settings in memories (call) for easy recall.
32
D Setting subaudible tones for
tone squelch operation (CTCSS tones)
Separate tone frequencies can be set for tone squelch oper-
ation than for repeater operation (the same range of tones is
available—see below). Like repeater tones, these are set in
set mode.
q Select VFO or a memory channel.
w Push [
SET] for 2 sec. to enter
(H/L)
set mode.
e Push [
J] or [
(H/L)(SET)
(TONE)
several times until "CT" appears
as shown at right.
r Rotate [DIAL] to select the de-
sired subaudible tone.
t Push [
CLR] to exit set mode.
(VFO)
• Subaudible tone frequency list
67.0
79.7
94.8
110.9
131.8
69.3
82.5
97.4
114.8
136.5
71.9
85.4
100.0
118.8
141.3
74.4
88.5
103.5
123.0
146.2
77.0
91.5
107.2
127.3
151.4
[
MAIN
T
SQL
K]
MAIN
T
SQL
(Unit: Hz)
156.7
171.3
186.2
203.5
229.1
159.8
173.8
189.9
206.5
233.6
162.2
177.3
192.8
210.7
241.8
165.5
179.9
196.6
218.1
250.3
167.9
183.5
199.5
225.7
254.1
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