TM9100 Mobiles: 110 W Mobile Installation Guide Installing the Radio 13
© Tait Electronics Limited October 2005
4.2 Installing the Antenna
This section provides information on installing an external antenna within
the RF exposure limits.
Install the external antenna (not supplied) according to the antenna
manufacturer’s instructions. Good quality 50 Ω coaxial cable must be used,
such as RG58 or UR76.
Important Route the cable in a manner that minimizes:
■ coupling into the electronic control systems of
the vehicle
■ coupling of electric vehicle systems, such as alternators,
into the radio.
Avoid sharp bends in the cable. These distort the cable and
alter its electrical characteristics.
Warning!! RF exposure hazard
To comply with FCC RF exposure limits, mount the antenna at a location
such that no person or persons can come closer than 44 inches (1.1m) to the
antenna.
■ VHF radios must be installed using an antenna mounted centrally
on the vehicle roof, with a gain of 2.15dBi or 5.15dBi.
Terminating the
Antenna Cable
1. Run the antenna cable (not supplied) from the antenna to the radio
mounting location and cut it to length, allowing approximately 8
inches (20 cm) excess at the radio end.
2. Strip the end of the coaxial cable as shown in Figure 4.1. Fit the right
angle N-type antenna connector (supplied) to the antenna cable.
Figure 4.1 Stripping the antenna cable
0.27 in
(6.8 mm)
0.33 in
(8.3 mm)
0.24 in
(6.0 mm)
0.83 in
(21 mm)
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