Detection of Noise Sources
Reducing Noise Interference in Mobile Two-Way Radio Installations 2-5
Figure 2-4 TLN6252A Noise Reduction Kit for Generator-Equipped Vehicles.
Some interference is due to geographic location and need not be eliminated with mobile radios since
it is possible for the vehicle to be moved away from the interfering noise source. Noise from power
lines, fluorescent lights, and other vehicles (emitting high levels of radiated noise) are examples of
noise which depends upon location. Make certain that you are not attempting to noise suppress a
vehicle while it is in a noisy location. If you suspect that your location is noisy, simply turn off
everything in the vehicle except the radio and listen to the remaining ambient noise. If the noise level
is objectionable, you may have to noise suppress the vehicle during a less noisy time of day or in a
different, quieter location.
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Notes:
1. Noise reduction can only be achieved if components are grounded properly.
2. Items not supplied in kit. See auto parts dealer.
Generator
Be sure that all the capacitors and the generator filed suppressor assembly are
grounded properly. This may require bonding straps for proper bypass
capacitor effectiveness.
Armature
Field
Common Ground
To
Voltage Regulator
To
Reference Quantity Motorola Description
Number Part Number
1 3 1V839913 Lead & Lug Assembly
2 1 1V80700A88 Lead & Lug Assembly
3 1 8C82571B02 Capacitor, Coaxial (0.1µF, 100V)
4 3 8C82571B01 Capacitor, Coaxial (0.5µF, 100V)
5 1 1V80700A89 Generator Field Suppressor Assembly
6 1 30A502396 Ignition Coil Suppressor Cable
- 1 1V80700A91 Hood Wipers (2) and Mounting
Hardware Kit (not illustrated).
Generator Field
ARM FLD BAT
Battery
Resistive wire
(note 2)
Resistor
Spark Plugs
(note 2)
Ignition
Coil
Battery
Ignition
Switch
Breaker
Points
Distributor
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