Realistic PRO-2001 - Mobile Noise Suppression

Mobile
Antenna
There
are many
possible
mounting locations
on a car. Three
most
popular
locations
for monitor
antennas are shown
below.
MOBI
LE
NOISE
SUPPRESSION
Your PR0-2001
is
a
very sensitive
receiver, and
will
pick
up even
extremely weak signals.
This means
that in
addition to the tiny radio
signals, radio-frequency
noise may
also be
picked
up and amplified.
In a mobile
installation,
it is important
that
you
take
steps
to
reduce
the amount of noise
that finds its way into
the Receiver.
[f
you
take
some
or all of
the
steps recommended
below,
your
reception
should
be
quite
satisfactory
f
or
mobile
applications.
Electrical
System
:
Generally speaking,
noise
can be
generated
by
any device
or
connec-
tion that carries
electrical current.
Any device that
generates
a spark
should also be suspected. Bypass any
suspected
wire
to
ground
with a
high
quality
1p F coaxial
capacitor.
A
very
common
source
of
noise is
the
generator
or alternator. This
type of
noise
will
sound like
a
musical
whine, and will
also
vary
with
speed of
the engine.
Generator
and alternator
noise can usually be
reduced
by connecting a coaxial-type capacitor from
the armature
terminal
to the metal case.
lgnition
System
:
The ignition system is
the most common
source
of
noise.
This noise
can
be
identified
by the fact
that
its
speed
varies
with
the engine
speed. lgnition noise will sound
like
a
series
of
"popping"
sounds,
while the engine
is
idling, and will speed
up to
a
buzzing
sound
as
engine
speed is
increased.
There are a number
of
things
that can
be
done
for
this type of
noise.
1.
Use
radio
suppression-type ignition
wire and
resistor
spark
plugs.
2.
Check
high-voltage
wiring for leakage, cracks,
etc.
Replace
any old
wiring.
3.
In
extreme cases,
obtain
an ignition
noise suppression
kit-it
should shield all ignition
wiring. This will
provide
maximum noise
su
pp
ression.
of the
A convenient and
efficient
antenna for mobile use is Radio
Shack's
VHF-Hi/Lo
UHF-Hi/Lo
No-Hole
Trunk Mount
Mobile. 20-017.
Keep the following
points
in
mind
antenna.
1. Mount it rigidly,
so
it
will
remain vertical
while
in
motion.
2.
Mount as
far as
possible
from
the
engine
compartment.
when
installing
your
mobile
i
i
ll
h;j
'u
dl
20-017
-12-