ENGINE NOISE SUPPRESSION
Interference from the impulse noise generated by the electrical systems of engines is sometimes a problem with radios. The MC480 has been designed to be essentially impervious to ignition impulse noise and alternator noise. However, in some installations it may be necessary to take measures to further reduce the effect of noise interference. All DC battery wires, antenna lead, and accessory cables should be routed away from the engine and engine compartment and from power cabling carrying particularly high currents.
In severe cases of impulse noise interference, it may be necessary to install a noise suppression kit that is available from your UNIDEN Dealer.
FRONT PANEL CONTROLS AND INDICATORS
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1.MICROPHONE CONNECTOR. . . Plug your Microphone in here.
2.ON/OFF VOLUME KNOB. . . is used to turn on the radio and set the volume to a comfortable level.
3.SQUELCH KNOB... is used to quiet background noise when no signal is being received. Turn the knob just past the point at which background noise is objectionable.
4.CHANNE L SE LECTOR. . . is used to select the desired channel. The channel is displayed by the LED readout.