Tait TM9100 Installation Manual

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Tait TM9100 Installation Manual Manual pdf 17 page image

18 Installing the Radio TM9100 Installation Guide© Tait Electronics Limited August 20052.4 Installing the AntennaThis section provides information on installing an external antenna withinthe RF exposure limits.Install the external antenna according to the antenna manufacturer’sinstructions. Good quality 50 Ω coaxial cable must be used, such as RG58or UR76.Important Route the cable in a manner that minimizes:■ coupling into the electronic control systems ofthe vehicle■ coupling of electric vehicle systems, such as alternators,into the radio.Avoid sharp bends in the cable. These distort the cable andalter its electrical characteristics.Warning!! RF exposure hazardTo comply with FCC RF exposure limits:1. Mount the antenna at a location such that no person or persons cancome closer than 35 inches (0.9m) to the antenna.2. For 40W/50W radios:■ VHF radios must be installed using an antenna mounted centrallyon the vehicle roof, with a gain of 2.15dBi or 5.15dBi.■ UHF radios must be installed using an antenna mounted eithercentrally on the roof with a gain of 2.15dBi or 5.65dBi, orcentrally mounted on the trunk with a gain of 5.65dBi.3. For 25W radios, the radio must be installed using an externallymounted antenna with a gain of either 2.15dBi or 5.15dBi.Terminating theAntenna Cable 1. Run the free end of the coaxial cable to the radio’s mounting positionand cut it to length, allowing approximately 8 inches (20 cm) excessat the radio end.2. Terminate the free end of the antenna cable with the mini-UHF plugor BNC plug (supplied) as shown in Figure 2.4.Figure 2.4 Terminating the antenna cable5/16"9/16"5/32"(4 mm)(8 mm)(14 mm)