SUBAUDIBLE TONE OPERATION
9
32
■
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.
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 [
(H/L)
SET] for 2 sec. to enter
set mode.
e
Push [
(H/L)(SET)
J
] or [
(TONE)
K
]
several times until “CT” appears
as shown at right.
r
Rotate [DIAL] to select the de-
sired subaudible tone.
t
Push [
(VFO)
CLR] to exit set mode.
67.0
69.3
71.9
74.4
77.0
79.7
82.5
85.4
88.5
91.5
94.8
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
• Subaudible tone frequency list
(Unit: Hz)
MAIN
T
MAIN
T
SQL
SQL
