Radio Shack TRC-504 Manuel du propriétaire télécharger pdf (Page 16)

REDUCING NOISE

Because your CB is exceptionally quiet,

any noise you hear is probably from an

external source in your vehicle such as

the alternator, another radio or spark

plugs.

The transceiver uses an ANL (Automatic

Noise Limiter) circuit to reduce noise.

However, if possible, try to eliminate the

noise by finding its source.

You can determine the noise’s source

by turning off the engine and operating

the CB with your vehicle’s ignition set to

ACC. If the noise is reduced, the prob-

lem is in your vehicle’s ignition or electri-

cal system.

Here are a few hints to help you reduce

or eliminate such noise.

• Make all CB power and antenna

wires as short as possible.

• Route the power wires away from

the antenna wires.

• Be sure that the chassis ground

connection is secure.

• Replace old ignition wires with new,

high-voltage, noise suppression

wires.

• Install noise suppressors on your

spark plugs, or install new spark

plugs that have built-in noise sup-

pressors.

• If problems persist, check your alter-

nator/generator and regulator

gauges. You can reduce the noise

from these sources by using bypass

capacitors at the various output volt-

age points.

Your local RadioShack store has a wide

selection of noise suppression accesso-

ries.

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Radio Shack TRC-504 Manuel du propriétaire Page 16