Kenwood TM-3530A - Manual (Page 46)

8-2. MOBILE INSTALLATION
8-2-1. Noise reduction
In motor vehicles, noise is generated by the ignition sys­
tem. Other sources of noise include the wiper and heater
motors.
Although the transceiver is equipped with a noise
blanker to minimize ignition noise, it is imperative that
some preventive measures be taken to reduce the noise
to the lowest possible level.
a. Antenna location selection
Since ignition noise is generated by the vehicles engine,
the antenna must be installed as far from the engine as
possible.
b. Bonding
The component parts of motor vehicles, such as the en­
gine, transmission, muffler system, accelerator, etc., are
coupled to one another at DC and low frequencies, but
are isolated at high frequencies. By connecting these
parts using heavy, braided ground straps, ignition noise
can be reduced. This connection is called "bonding".
c. Use ignition suppressor cable or suppressor spark
plugs
Noise can be reduced by using spark plugs with internal
resistors, or resistive suppressor ignition cable.
d. Battery power connection
It is recommended that battery power be supplied direct­
ly to the transceiver from the battery terminals.
Caution:
Disconnect the transceiver before jump-starting or be­
fore charging the battery.
8-2-2. Battery capacity
The power system of a motor vehicle is comprised of a
battery and an alternator (which generates power while
the engine is running) to supply current to loads or to
charge the battery.
Since the transceiver draws high current during transmit,
care should be excersised so the power system is not
overloaded. When using the transceiver, the following
points should be observed from the viewpoint of battery
maintenance:
a. Turn the transceiver OFF when the lights, heater, wip­
ers and other high-draw accessories are used.
b. Avoid transceiver operation when the engine is not
running.
c. If necessary, use an ammeter and/or a voltmeter to
check battery condition.
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