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GROUP MODE (CTCSS)
6
DD
CTCSS code table
(unit: Hz)
CH Freq. CH Freq. CH Freq. CH Freq.
01 67.0 11 97.4 21 136.5 31 192.8
02 71.9 12 100.0 22 141.3 32 203.5
03 74.4 13 103.5 23 146.2 33 210.7
04 77.0 14 107.2 24 151.4 34 218.1
05 79.7 15 110.9 25 156.7 35 225.7
06 82.5 16 114.8 26 162.2 36 233.6
07 85.4 17 118.8 27 167.9 37 241.8
08 88.5 18 123.0 28 173.8 38 250.3
09 91.5 19 127.3 29 179.9 --- OFF
10 94.8 20 131.8 30 186.2
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 specic 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-
vateanyone 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.
IC-4088SR.qxd 03.9.2 20:45 Page 13 (1,1)
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