Ignition Noise Interface - Cobra 29 LTD Classic Contents How To Use Manual

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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 automobiles

is from the alternator and ignition system.

Typically, when signal level is adequate, the back-

ground 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 29 LTD Classic has an

automatic noise limiter, in some installations igni-

tion interference may be high enough to make

good communications impossible. Many possibili-

ties 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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