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D D CTCSS code table
CH
Freq.
01
67.0
02
71.9
03
74.4
04
77.0
05
79.7
06
82.5
07
85.4
08
88.5
09
91.5
10
94.8
✔ What is CTCSS (Continuous Tone Coded Squelch System)
GROUP MODE ?
CTCSS (Continuous Tone Coded Squelch System) GROUP
MODE allows communication with silent stand by. Only signals
containing a specific group code can open the squelch.
This conveniently eliminates unwanted audio and is useful in
group activities or security related activities where unwanted out-
put can be a problem. Note that CTCSS group mode is not pri-
vate—anyone can receive your calls.
The IC-4088SR is equipped with 38 tone codes for CTCSS
GROUP MODE use. Selecting a code applies it to all 8 operating
channels. Each push of [PTT] superimposes your group code over
your transmit signal; and, only signals containing the same code
can open your squelch. To temporarily hear all signals (including
noise) push and hold [MODE]. Do not use CTCSS GROUP MODE
if you want to be able to hear signals on all channels.
CH
Freq.
11
97.4
12
100.0
13
103.5
14
107.2
15
110.9
16
114.8
17
118.8
18
123.0
19
127.3
20
131.8
GROUP MODE (CTCSS)
CH
Freq.
21
136.5
22
141.3
23
146.2
24
151.4
25
156.7
26
162.2
27
167.9
28
173.8
29
179.9
30
186.2
6
CH
Freq.
31
192.8
32
203.5
33
210.7
34
218.1
35
225.7
36
233.6
37
241.8
38
250.3
- - -
OFF
(unit: Hz)
6
13
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