Audiovox GMRS862CH - Manual (Page 11)

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Adjusting the Volume (11, 10)
With the unit powered on, press the Up Channel/Volume button ( ) to
increase volume and the Down Channel/Volume button ( ) to decrease
volume. The display will indicate the current volume level (U
L) followed by
the number (0-7). As volume is increased upward, the unit will beep at
each step, and vice-versa. When the minimum and maximum volume
settings are reached, a unique tone will sound.
Monitor/Display Backlight Button (2)
This button is used to to check activity on the current frequency before
transmitting. Check activity by pressing the Monitor (M) Button longer
than 2 seconds; the
icon will apppear on the display and you will hear
static if frequency is clear. Do not transmit if you hear conversation.
Hold down the Monitor Button again longer than 2 seconds and the
icon will disapppear from the display.
The monitor function will temporarily bypass the squelch setting and play
all signals on a given channel. This feature is useful when communicating
with other parties at extreme range.
By pressing the monitor button momentarily, the LCD backlight is turned
on; the LCD backlight will turn off automatically in about 5 seconds, unless
the monitor button is pressed momentarily once again.
Push To Talk (PTT) Button (4)
Pressing and holding this button will allow you to speak to any transceiver
that is set to the same channel and privacy code setting as yours. Hold the
transceiver approximately 1 to 2 inches from your face as you speak into
the built in microphone (9). After you have finished speaking, release the
PTT Button to allow reception of incoming signals. It is not possible to
transmit and receive at the same time. Whenever the button is pressed,
the transmit signal icon ( ) will appear in the upper left corner of the
display. Releasing the button allows the unit to revert to standby mode.
When receiving an incoming signal, the
icon will appear.