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The GMRS-1545 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 transmit-
ting on the selected channel, press the Monitor (M) Button (6) 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 (11) once; the
channel number flashes.
- Press the Up button (9) briefly to move to the next higher main channel
number.
- Press the Down button (13) briefly to move to the next lower main
channel number.
CTCSS Mode (Sub-Channel) Selection
This unit provides a Coded Tone Controlled Squelch System (CTCSS) with 38
Sub-Frequencies for each main channel. This feature allows you to utilize the
coded squelch tones (01–38) 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). 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
00 or sub-channel number is displayed. If 00 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.
- Then press the Up or Down button to select the desired sub-channel
for use.
- The selected sub-channel will continue flashing for about 5 seconds
and then remain steady on the display.
The CTCSS mode can be turned off by selecting 00 as the setting.