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12
Operational Hints
Note
: Your CB radio’s transmission range is
generally line-of-sight.
REDUCING NOISE
Note:
Operation instructions are for satisfy-
ing FCC RF exposure requirements.
Because your CB is exceptionally quiet, any
noise you hear is probably from an external
source in your vehicle such as an alternator,
another radio, or spark plugs.
The transceiver uses an ANL (Automatic
Noise Limiter) circuit to reduce noise. How-
ever, 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 (or
ON). If the noise is reduced, the problem is in
your vehicle’s ignition or electrical 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 connec-
tion 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 suppressors.
• If problems persist, check your alterna-
tor/generator and regulator gauges. You
can reduce the noise from these
sources by using bypass capacitors at
the various output voltage points.
Your local RadioShack store has a wide se-
lection of noise-suppression accessories.
21-1705.fm Page 12 Thursday, September 7, 2000 10:41 AM