Audiovox GMRS-1535 - Manual (Page 9)

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transmit and receive at the same time. The Transmit/Monitor LED at the
upper right corner of the LCD Panel (8) will light
red while the PTT Button is
pressed and the signal indicator will display the relative strength of the
transmitted signal.
Releasing the button allows the unit to revert to standby mode. When
receiving an incoming signal, the Transmit/Monitor LED indicator will light
green and the received signal strength indicator (
) will display
the relative strenth of the signal.
The PTT Button can also be used as a two-way call ringer. Pressing the
button twice quickly will call another party on the same channel. The Transmit
LED will light
red for approximately 3 seconds and then go out.
Up Channel/Volume Button (10)
In the standby mode, pressing this button will increment the listening
volume. When in function edit mode this button will be used to adjust the
unit’s settings.
Down Channel/Volume Button (11)
In the standby mode, pressing this button will decrement the listening
volume. When in function edit mode this button will be used to adjust the
unit’s settings.
Mode Button (12)
This button is used to select various feature settings in the GMRS or weather
band mode. Holding the MODE button longer than 2 seconds will toggle
between the GMRS and weather band modes.