Motorola MICOM-2TS Spécifications télécharger pdf (Page 121)

MICOM-2E-ALE Owner’s Manual

Vehicular Noise Reduction

Most vehicles are subject to several noise sources which greatly disturb

a received signal. The most noisy sources are the high voltage ignition

sparks that are produced at the vehicle's plugs. The second is the

alternator activity.

In keeping with the following insulation practices and if necessary by

adding some damping components, it may be possible to reduce these

noises to a tolerable level.

1. Keep your antenna tuner and antenna as far as possible from the

engine compartment.

2. Connect the primary power lead of the radio directly to the battery

instead of the starter relay. The battery acts as a large capacitor

(about one farad for 50 Amp capacity batteries) by passing the

noise to ground.

3. If necessary, connect 0.01 - 0.1 micro farad capacitors across the

primary leads of the coil and across the alternator output.

4. Keep your DC and RF cables as short as possible.

5. If your vehicle does not have a resistive ignition wire, it is

recommended to replace it with a such a wire.

6. The MOTOROLA RF noise reduction kit for alternator equipped

vehicles (TLN8845) includes some useful accessories for noise

reduction. Among them being the resistive ignition coil suppresser

cable. In severe noise conditions, you may find this kit helpful.

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Motorola MICOM-2TS Spécifications Page 121