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GR25LTDST-English copy
6/21/99 11:59 AM
Antennas
CB Antenna
CB Antenna
The antenna is critical in affecting transmission
distance. Only a properly matched antenna sys-
tem will allow maximum power output. Cobra
loaded type antenna models are highly recom-
Note
mended for most installations.
For optimum performance in
passenger cars the ideal
antenna location is on the
centre of the roof. Second
choice is on the centre of the
boot.
Note
Antenna bracket must be
earthed to the chassis of the
vehicle.
A standard antenna connector is provided
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on the transceiver for easy connection.
Marine Installation
The transceiver will not operate at maximum effi-
ciency in a boat without an earthing plate, (unless
it has a steel hull). Before attempting installation ,
consult your dealer for information regarding an
adequate earthing system and prevention of
electrolysis between fittings in the hull and water.
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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 cars is from
the alternator and the ignition system. Typically,
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
the vehicle's engine turned off. The unit requires
very little current and therefore will not signifi-
cantly discharge the vehicle's battery.
Even though the Cobra GR 25 LTD ST has an auto-
matic noise limiter, in some installations ignition
interference may be high enough to make good
communications impossible. Many possibilities
exist and variations between vehicles require
different solutions. Consult your COBRA dealer or
a 2-way radio technician for help in locating the
source of a severe noise.
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