Subaudible Tones; Tone Squelch - Icom IC-V85 Instruction Manual

9

SUBAUDIBLE TONES

■ Tone squelch

D Operation
The tone squelch opens only when receiving a signal con-
taining a matching subaudible tone. You can wait for calls
from group members using the same tone and not hear other
signals.
q Set the operating frequency.
• Set the volume and squelch to the desired level as the normal op-
eration.
w Set the desired subaudible tone in
• See page 40 for programming.
e Push [FUNC], then push [
• Repeat several times until " " appears when selecting CTCSS,
or " " appears when selecting DTCS.
D
Push
A
TONE
1
FUNC
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 [MONI].
t Transmit in the normal way.
y To cancel the tone squelch, push [FUNC] and [
• Repeat several times until " " or " " disappears.
39
.
SET MODE
](1).
TONE
CTCSS DTCS
TONE
D
NOTE: The transceiver has 50 tone frequencies and con-
sequently their spacing is narrow compared to units having
38 tones. Therefore, some tone frequencies may receive
interference from adjacent tone frequencies.
To prevent interference from adjacent tone frequencies,
using the frequencies as in the following table, is recom-
mended.
• Recommended CTCSS frequencies
67.0 79.7
69.3 82.5
71.9 85.4
74.4 88.5
77.0 91.5
• Recommended DTCS codes
023 051 114 143
025 054 115 152
026 065 116 155
031 071 125 156
032 072 131 162
043 073 132 165
047 074 134 172
](1).
94.8 110.9 131.8 156.7
97.4 114.8 136.5 162.2
100.0 118.8 141.3 167.9
103.5 123.0 146.2 173.8
107.2 127.3 151.4 179.9
174 251 315 371 445
205 261 331 411 464
223 263 343 412 465
226 265 346 413 466
243 271 351 423 503
244 306 364 431 506
245 311 365 432 516
(Unit: Hz)
186.2 225.7
192.8 233.6
203.5 241.8
210.7 250.3
218.1
532 631 723
546 632 731
565 654 732
606 662 734
612 664 743
624 703 754
627 712