CONTROLS AND INDICATORS
There are thirteen Controls and three indicators on the front panel of your
COBRA 148GTL-DX.
Section IV
Operation
A, CONTROL FUNCTIONS
1. MIKE GAIN, (inner dual concentric) Ad justs the microphone gain in the
transmit and PA modes. This Controls the gain to the extent that fuli talk
power is available several inches away from the microphone.
2. OFF/ON/VOLUME (inner dual concentric). Turn clockwise to apply power
to the unit and to set the desired listening level. During normal CB opera
tion, the VOLUME control is used to adjust the output level obtained either
at the transceiver speaker or the extemal speaker, if used.
3. SQUELCH (outer dual concentric). This control is used to eut off or elimi-
nate receiver background noise in the absence of an incoming signal. For
maximum receiver sensitivity it is desired that the control be'Idjusted only
to the point where the receiver background noise or ambient background
noise is eliminated. Tum fully counterclockwise then slowly clockwise until
the receiver noise disappears. Any signal to be received must now be slightly
stronger than the average received noise. Further clockwise rotation will
increase the threshold level which a signal must overcome in order to be
heard. Only strong signais will be heard at a maximum clockwise setting.
4. RF GAIN CONTROL (outer dual concentric). Used to reduce the gain of
the RF amplifier under strong signal conditions.
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