4 BK Radio
BUSY CHANNEL
INDICATOR
BASIC OPERATION
RECEIVE 1. TURN POWER ON by turning the volume knob
clockwise. A beep sounds, indicating the radio is
operational. The LCD display, if installed, shows
the current channel.
2. SELECT A CHANNEL by turning the channel
selector knob.
3. 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 mode.
A message will be heard only when the proper Code
Guard value is received.
TRANSMIT 1. PRESS THE PTT (Push To Talk) switch. When
the transmitter is on, the red transmit indicator
glows and TX appears in the display.
2. TALK IN A NORMAL VOICE with the microphone
1–2 inches from your mouth.
3. 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 Lobat, 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.
Micro
hone
PTT
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