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What is CTCSS (Continuous Tone Coded Squelch Sys-
tem) GROUP MODE ?
CTCSS (Continuous Tone Coded Squelch System) GROUP
MODE allows communication with silent stand by. Only signals
containing your 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-40Jr is equipped with 38 tone codes for CTCSS GROUP
MODE use. Selecting a code applies to all 40 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 all signals on the channel.
D CTCSS code table
Code
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
Code
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)
Code
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
8
Code
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)
15
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