Audiovox GMRS-1545 - Manual (Page 12)

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NOTE: To communicate with other GMRS units, they must be switched
to the same channel and CTCSS subcode. To communicate
with other GMRS units that do not have subcodes, switch your
unit to the same channel with the subcode set to 00.
The CTCSS subcodes do not prevent others from hearing your transmis-
sion. This will only allow you to ignore all traffic on a given channel not using
the same subcode.
VOX Selection Mode
This option enables you to have hands-free conversation when using the
internal microphone/speaker or an external microphone/headset (pur-
chased separately). Your voice or nearby sound is detected and the radio
transmits without the need to press the PTT button. A VOX setting of 1 is the
least sensitive. A VOX setting of 5 is the most sensitive.
To set radio for VOX operation:
- From GMRS standby mode, press the MODE button three times
until the Uo icon flashes on the display together with the VOX icon.
- Press the Up or Down button to select VOX On (if oF appears
flashing) and the 1-5 VOX level sensitivity.
- Momentarily press the PTT button to confirm the VOX selection.
- The VOX icon will appear steady on the LCD display.
VOX can be turned off by selecting oF as the setting.
Dual Watch Mode
This feature allows you to monitor two channels at the same time. While in
dual watch mode, the unit will continuously monitor both the primary and
dual watch channel. Received signals will be played for 5 seconds, then the
unit will resume scanning the two channels. Pressing the PTT button during
a received transmission will set the unit to transmit on the same channel.
Pressing the PTT button when no signal is received will set the unit to
transmit on the primary channel.