Audiovox GMRS122-2 Owner's Manual page 12

To change the channel:
- From GMRS/FRS standby mode, press the MODE button (12) once
the channel number flashes.
- Press the Up Button (10) briefly to move to the next higher main chan-
nel number.
- Press the Down Button (11) briefly to move to the next lower main
channel number.
- Press the PTT button momentarily to confirm selection.
CTCSS Mode (Sub-Channel) Selection
The Coded Tone Controlled Squelch System (CTCSS) has 38 Sub-Frequencies.
This feature allows you to utilize the coded squelch tones (01-38) within a
main channel and enables you to communicate with another party on the
same main channel using the same subcode. (This filters out unwanted
transmissions from the same main channel). Since there are 38 CTCSS
Sub-channels for each main channel, a different subcode may be se-
lected for each of the 22 channels.
To change the CTCSS Sub-channel:
- From GMRS/FRS standby mode, press the MODE Button twice; a flash
ing oF or sub-channel number is displayed.
- Press the Up or Down button to select the desired sub-channel for
use (01-38 ).
- Press the PTT button to confirm selection.
The CTCSS mode can be turned off by selecting the oF icon as the setting.
NOTE: To communicate with other GMRS/FRS units, they must be
switched to the same channel and CTCSS subcode. To commu-
nicate with other GMRS units that do not have subcodes, switch
your unit to the same channel with the subcode set to oF.
The CTCSS subcodes do not prevent others from hearing your
transmission. This will only allow you to ignore all traffic on a
given channel not using the same subcode.
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