Engine Noise Suppression - Uniden UM455 Owner's Manual

Maintenance and Troubleshooting

Engine Noise Suppression

Interference from the noise generated by the electrical systems of engines is
sometimes a problem with radios. The UM455 has been designed to be essentially
impervious to ignition noise and alternator noise. However, in some installations it
may be necessary to take measures to further reduce the effect of noise interference.
The UM455 radio DC battery wires, antenna lead, and accessory cables should
be routed away from the engine and engine compartment, and from power cabling
carrying high currents. In severe cases of noise interference, it may be necessary to
install a noise suppression kit. Contact the dealer where you purchased the radio for
more information.
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