INSTALLATION
LOCATION
Plan the location of the transceiver and microphone
bracket before starting the installation. Select a location
that is convenient for operation and does not interfere
with the drive or passengers in the automobiles, the
transceiver is usually mounted the dash panel with the
microphone bracket beside it.
MOUNTING THE RADIO
The transceiver is supplied with a universal mounting
bracket. When mounting the bracket and radio to your car,
make sure it is mechanically strong. Also provide a good
electrical connection to the chassis of the vehicle. Proceed
as follows to mount the transceiver:
1.
After you have determined the most convenient
location in your vehicle, hold the transceiver with
mounting bracket in the exact location desired. If
nothing will interfere with mounting it in the desired
position remove the mounting bolts. Before drilling the
holes, make sure nothing will interfere with the
installation of the mounting bolts.
2.
Connect the antenna cable plug to the standard
receptacle on the rear panel. Most transceiver antennas
are terminated with a type PL-259 plug and mate with
the receptacle.
3.
Connect the red DC power input wire (with the fuse) to
+13.8V
DC. This wire extends from the rear panel. In
automobile installation,
+13.8V
DC is usually obtained
from the accessory contact on the ignition switch. This
prevent the set being left on accidentally when the
driver leaves the car and also permits operating the
unit without the engine running. Locate the accessory
contact on most ignition switches by tracing the power
wire from the AM broadcast receiver in the car.
4.
Connect the black lead to
—13.8V
DC. This is usually
the chassis of the car. Any convenient location with
good electrical contact (remove paint) may be used.
5.
Mount the microphone bracket on the right side of the
transceiver, using two screws supplied. When
mounting in an automobile, place the bracket under
the dash so that microphone is readily accessible.
IGNITION NOISE INTERFERENCE
Use of a mobile receiver at low signal levels is normally
limited by the presence of electrical noise. The primary
source of noise in automobile installation is from the
generator and ignition system in the vehicle. Under most
operating conditions, when signal level is adequate, the
background noise does not present a serious problem.
Also, when extremely low level signals are being received,
the transceiver may be operated with vehicles engine
turned off. The unit requires very little current and
therefore will not significantly discharge the vehicle
battery.
Even though the transceiver has ANL and NB controls, in
some installation ignition interference may be high
enough to make good communications impossible. The
electrical noise may come from several sources. Many
possibilities exist, as variations between vehicles require
different solutions to reduce the noise.
ANTENNA
A vertically polarized, quarter-wavelength whip antenna
provides the most reliable operation and greatest range.
Shorter, loaded-type whip antennas are more attractive,
compact and adequate for applications where the
maximum possible distance is not required. Also, loaded
whips do not present the problems of high wind resistant
imposed by a full quarter-wavelength whip.
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