Icom IC-4008A Manual page 6

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GROUP MODE (CTCSS)
. Setting the group code
The IC-4008A is equipped with 38 group codes. Group mode op-
eration provides communication with silent standby since you will
only receive calls from group members using the same group num-
ber.
First of all, set the same group code number for all group member's
transceivers.
Turn ON the group mode operation:
Push [MODE] to enter set mode.
CD
."
--- " (group mode OFF) appears
the display.
en
Push [UP]/[A] or [DOWN]/["'] to select
the desired code number.
W
Push [MODE] to set the group code
number.
Cancel the group mode operation:
.
Push [MODE] to enter set mode.
CD
Code number disappears
play.
en
Push [UP]/[A] or [DOWN]/["'] to select
"---" (groupmode OFF).
W Push [MODE] to cancel the group
mode.
~
~ NOTE: Only stations with the same group channel number can
be heard during group mode operation, even when the busy in-
~
dicator appears on the display.
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on
~
on the dis-
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What is CTCSS (Continuous Tone Coded Squelch Sys-
II'
tem) GROUP MODE?
~
CTCSS (Continuous Tone Coded Squelch System) GROUP
MODE allows communication with silent stand by. Only signals
J
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
output can be a problem. Note that CTCSS group mode is not
private-anyone
The IC-4008A is equipped with 38 tone codes for CTCSS
GROUP MODE use. Selecting a code applies it to all 14 oper-
ating channels.
code over your transmit signal; and, only signals containing the
same code can open your squelch. To temporarily hear all sig-
nals (including noise) push and hold [MODE].
CTCSS GROUP MODE if you want to be able to hear signals
on all channels.
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CTCSS: Continuous Tone Coded Squelch System
can receive your calls.
Each push of [PTT] superimposes your group
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Do not use