Radio Frequency Interference; Types Of Noise; Noise From The Ignition System; Table 17: Noise Source And Type - Codan 2110 series Reference Manual

Radio frequency interference

Types of noise

Engine noise and electrical accessories often cause RF interference.
Noise interference can be:
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Table 17:
System
Ignition
Battery charging
Other

Noise from the ignition system

The ignition system of a petrol motor vehicle is often a major noise source.
High-voltage wiring
All high-voltage wiring from the ignition coil to the spark plugs should be:
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•
•
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Manpack Transceiver 2110 series Reference Manual
Using the 9350 Automatic Tuning Whip Antenna with a 2110 Manpack Transceiver
induced into and carried along the cables to the transceiver
radiated from the noise source and picked up at the antenna
Noise source and type
Noise source
Ignition
Alternators
Brakes and bearings
Mechanical voltage regulators Contact arcing
Oil pressure sender
Tachometer
Winches
Wipers and fan motors
as short as possible
clean
as close to the engine block as possible
of a suppressed type
Noise type
Distributor and spark plug
leads
Diode switching and brushes
Static discharge
Contact arcing
Impulse
Motor brushes
Motor brushes
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