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Channel Selection
In order to communicate with other GMRS units, both transmitting and
receiving party must be on the same frequency.
The GMRS-1535 has 15 channels (frequencies) (1-15) indicated by the
large digits on the LCD display panel. Channels 1 through 7 are the
same frequency as FRS channels 1 through 7. Communication with
Audiovox FRS and compatible units is possible on these seven channels.
Before transmitting on the selected channel, press the Monitor (M) Button
(2) to check the activity on that channel. If there is activity on the selected
channel, change to another channel that is clear.
To change the channel,
- From GMRS standby mode, press the MODE button (12) until the
channel number flashes.
- Press the Up Button (10) briefly to move to the next higher main
channel number.
- Press the Down Button (11) briefly to move to the next lower main
channel number.
CTCSS Mode (Sub-Channel) Selection
Coded Tone Controlled Squelch System (CTCSS) with 38 Sub-Frequencies.
This feature allows you to utilize the coded squelch tones (00–38) within a
main channel. This enables you to communicate with another party on the
same main channel using the same subcode. (This filters out unwanted
transmissions without the same coded squelch tone). There are 38 CTCSS
Sub-channels for each main channel. A different subcode may be
selected for each of the 15 channels.
To change the CTCSS Sub-channel,
- From GMRS standby mode, press the Mode Button twice; a flashing
oF or sub-channel number is displayed. If oF is displayed, press the
Up or Down button to enable the CTCSS mode; the CTC icon will
appear steady on the display with the flashing sub-channel number.