Motorola GM1200E, Руководство по установке

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Noise Reduction Techniques
2-10 Reducing Noise Interference in Mobile Two-Way Radio Installations
5.5 Voltage Regulator Noise
This type of interference is characterised by erratic popping noises which change only slightly with
changes in engine speed. The noise is generated by arcing in the vibrating breaker contacts of the
voltage regulator. It can be suppressed by connecting a 0.5
µ
F coaxial capacitor (Motorola Part No.
8C82571B01) in the battery and armature leads of the voltage regulator (see figure 2-8).
Figure 2-8 Voltage Regulator Noise Suppression.
5.6 Hood and Trunk Lid Noise
This type of noise is characterised by irregular popping sounds. It is caused by friction in poorly
bonded automobile hoods or trunk lids, which causes static electricity to build up until arcing occurs.
This type of noise is suppressed using a Motorola Hood Wipers and Mounting Hardware Kit (part of
TLN8845A or TLN6252A Noise Reduction Kits) which provides electrical bonding of the hood or
trunk to the vehicle body while permitting them to be opened.
CAUTION: Disconnect the battery ground terminal before attempting to connect components
to the voltage regulator.
Step 1.
Step 2.
Step 3.
Vehicle
Battery
Field
Armature
A coaxial capacitor can
Chassis
Post
be added here, if required.
Add lead from battery
post to capacitor using
lockwasher and nut.
Disconnect wire (dashed)
from battery post and
connect to capacitor
using lockwasher and nut.
Mount Capacitor
(0.5
µ
F Coaxial Type)
to vehicle chassis
using lockwasher
and self-tapping screw.