Installation Manual

8
Chapter 4
Antenna Installation
4.1 Mobile Radio Operation and EME Exposure
Observe the following caution and electromagnetic energy exposure (EME) statements when
installing antennas:
4.2 Selecting an Antenna Site
1. Install the vehicle antenna external to the vehicle in accordance with the requirements of the
antenna manufacturer/supplier.
2. The best mounting location for the antenna is in the center of a large, flat conductive surface. In
almost all vehicles, mounting the antenna in the center of the roof will satisfy these requirements.
A good alternate location is in the center of the trunk lid (check the requirements of the antenna
manufacturer/supplier before mounting the antenna to the trunk lid). If you use the trunk lid,
ensure that the trunk lid is grounded by connecting grounding straps between the trunk lid and the
vehicle chassis.
3. Ensure that the antenna cable can be easily routed to the radio. Ensure that the antenna cable is
routed separately and not in parallel to any other vehicle wiring or mobile radio cable wiring.
4. Check the antenna location for any electrical interference.
5. If the vehicle is equipped with an electronic anti-lock braking system (ABS), and the antenna will
be trunked mounted, then install the antenna on the side opposite to the braking modulator box.
This minimizes radio interference to the modulator box from the radio.
6. Make sure the mobile radio antenna is installed at least one foot (30.48 cm) away from any other
antenna on the vehicle.
CAUTION: Use caution when installing antennas with mobile radio equipment using
transmitter power in excess of 7 Watts.
NOTE
For low-power mobile radios (7 Watts, or less), there are no antenna type or
installation restrictions.
NOTE
Any two metal pieces rubbing against each other (such as seat springs, shift levers,
trunk and hood lids, exhaust pipes, etc.) in close proximity to the antenna can cause
severe receiver interference.
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