Operation GPH-CMD VHF Radio
Page 3-6 BK RADIO
3.5 BASIC OPERATION
3.5.1 RECEIVE
Turn power on by turning the Volume knob clockwise. A beep sounds,
indicating the radio is operational. The LCD display shows the current
channel.
Select a channel by rotating the Channel Selector knob. When the
unstopped channel selector is rotated past the highest (20
th
) channel, the
radio will emit a beep and remain on the highest channel. When rotated past
the lowest (1
st
) channel, the radio will emit a beep and remain on the lowest
channel.
Adjust squelch and volume by turning the Squelch knob clockwise until you
hear noise. Set the volume to a comfortable level. Then turn the Squelch
knob counterclockwise until the noise stops. This is called the Threshold
Squelch setting.
Turning the Squelch knob fully counterclockwise past the detent places the
receiver in Code Guard. A message will be heard only when the proper Code
Guard value is received.
3.5.2 TRANSMIT
Press the PTT (Push-To-Talk) switch. When the transmitter is on, the red
Transmit Indicator glows and TX appears in the display.
Talk in a normal voice with the microphone one to two inches from your
mouth.
Release the PTT switch to stop transmitting.
If the Transmit Indicator does not glow when you press the PTT switch, the
battery pack may need to be charged. If so, the display will indicate
LOBATT, and the yellow Low-Battery Indicator will flash. If the Transmit
Indicator does not glow and a tone sounds, you are on a receive-only
channel or the channel is busy (if Busy Channel lockout is enabled). Select
an authorized transmit channel.
If the length of your message exceeds the preset Time-Out Timer setting,
the transmitter automatically shuts off and a tone sounds. To continue
transmission, release the PTT switch, and then press it again and continue
talking.
Microphone
PTT
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