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Maintenance and Troubleshooting
Engine Noise Suppression
Interference from the noise generated by the electrical systems of engines
is sometimes a problem with radios. The UM425 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 UM425 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.
UM425 VHF OM.indd 53 28/9/11 11:55:22 AM