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MM-014763-001, Rev. E
6
ANTENNA INSTALLATION
6.1
ANTENNA MOUNTING LOCATIONS
Antennas must be mounted in one of three possible locations on the vehicle. Figure 6-1 shows the
recommended locations and antenna part numbers. Also, see Table 4-5 for additional information. Always
follow the antenna manufacturer's instructions when mounting an antenna.
6.1.1
Direct Center or Center-Rear of Rooftop
The center of the vehicle's roof is the best location for a rooftop-mount antenna (location in Figure
6-1). For optimal performance, the mounting area under the antenna must be a flat with a minimum
radius of six (6) inches of metal ground plane. It must be located directly in the center of the roof to
minimize human exposure to RF electromagnetic energy. Other obstructions such as a light bar or another
antenna may prevent the antenna from being mounted in the direct center of the roof. In this case, the
antenna should be mounted a minimum of one foot away from and behind the obstruction but in the
middle of the roof with respect to the left and right sides of the vehicle (location in Figure 6-1).
6.1.2
Center of Trunk Lid
Certain vehicles do not allow for the antenna to be placed in the center or center-rear of the roof. In this
case, the next best location for the antenna is in the direct center of the trunk lid (location in Figure
6-1). In this case, an elevated-feed-point antenna is recommended. Although this type of antenna does
not require a metal ground plane, it must be located directly in the center of the trunk lid to minimize
human exposure to RF electromagnetic energy.
6.2
ANTENNA INSTALLATION PROCEDURE
6.2.1
Install the Mobile Antenna
Table 4-5 (page 23) and Figure 6-1 (page 31) list the mobile radio antennas available for use with the
radio. As presented in the previous section, various mounting locations exist. Optimal performance is
achieved via a rooftop antenna mounted in the direct center of the motor vehicle's roof. The following
mobile antenna installation procedure is recommended:
1. Once the mounting location is selected, refer to the antenna manufacturer's mounting and testing
instructions included with the antenna kit for installation guidance. Install the antenna in accordance
with these instructions. If necessary, contact the Technical Assistance Center. See page 20 for TAC
contact information.
30
At this time, review all information presented in the REGULATORY AND
SAFETY INFORMATION section of this manual (see page 6). A transmitting
antenna must be installed in accordance with the guidelines presented in the
REGULATORY AND SAFETY INFORMATION section. Use Table 1-1 (for VHF
radios) and Table 1-2 (for 700 and 800 MHz radios) and Figure 6-1 as a guide for
determining the best possible mounting configuration/location in order to reduce
human exposure to radio frequency (RF) electromagnetic energy during transmit
mode.
An antenna must be installed before completing the radio installation.
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