Choosing A Location; Engine Noise Suppression - Uniden UM525 Owner's Manual

UM525 Paper OM.fm Page 16 Tuesday, January 4, 2005 2:54 PM
Keep in mind the flexibility designed into the UM-525 so that you can most
conveniently use it. Features which should be considered are:
• The universal mounting bracket may be installed on either the top or bottom of a
shelf, on a bulkhead, or for overhead mounting.
• The remote speaker wires can be used with an auxiliary speaker.
• All connections are "plug-in" type for easy removal of the radio.
• By using an optional WHAM or WHAM x 4 (Wireless Handheld Access
Microphone), the UM-525 can be mounted completely out of the way.
• Also optionally available is a flush mount bracket (FMB321).

Choosing a Location

Here are some important factors to consider in selecting the location for your UM-525.
• The UM-525 is completely waterproof, but will last longer if protected from spray
and splash.
• Keep the battery leads as short as possible. Direct connection to the battery is
most desirable. If direct connection can not be made with the supplied power lead,
any extension should be made with #12-14 AWG wire. Long extensions should
use larger gauge wire.
• Keep the antenna lead-in wire as short as possible. If you must use a long lead-in
wire as in the case of a sailboat masthead antenna installation, we recommend
you upgrade your lead-in wire according to the following table:
RG-58 <20'
RG-8X <35'
RG-8U <60'
• Locate your antenna as high as possible and clear from metal objects. The reli-
able range of coverage is a direct function of the antenna height.
• Select a location that allows free air flow around the heat sink on the rear of the
radio.
• Select a location well away from the ship's compass. Auxiliary speakers also
should be located away from the compass.

Engine Noise Suppression

Interference from the noise generated by the electrical systems of engines is
sometimes a problem with radios. The UM-525 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
UM-525 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.
16
Setting Up the Radio