User's Manual

18 TM9100 (40W/50W) Installation Guide

2.5 Installing the Antenna

Introduction This section provides the information required for the installation of an

external antenna within the RF exposure limits. For further information

refer to the antenna manufacturer’s instructions.

Warning!! RF exposure hazard

To comply with FCC RF exposure limits:

■ VHF radios must be installed using an antenna mounted centrally on the

vehicle roof, with a gain of 2.15dBi or 5.15dBi.

■ UHF radios must be installed using an antenna mounted either centrally

on the roof with a gain of 2.15dBi or 5.65dBi, or centrally mounted on

the trunk with a gain of 5.65dBi.

This antenna must not be mounted at a location such that any person or

persons can come closer than 35 inches (0.9m) to the antenna.

Installing the Antenna Install the external antenna according to the antenna manufacturer’s

instructions. Good quality 50Ω coaxial cable must be used, such as RG58

or UR76.

Connecting the Antenna Cable Important The cable must be routed in a manner that minimizes cou-

pling into the electronic control systems of the vehicle.

Important The cable must be routed in a manner that minimizes cou-

pling of electric vehicle systems such as alternators into the

radio.

Important Protect the antenna cable from engine heat, sharp edges and

from being pinched or crushed.

1. Run the free end of the coaxial cable to the radio’s mounting position

and cut it to length, allowing approximately 8 inches (20cm) excess

at the radio end.

2. Terminate the free end of the cable with the mini-UHF plug

supplied.