Harris Corporation RF Communications Division XG-100LPA Manuale Utente
14221-1200-4010, Rev. B
40
8. ANTENNA INSTALLATION
8.1 ANTENNA MOUNTING LOCATIONS
For a standard motor vehicle, the MRU antenna must be installed at or near the center of the vehicle’s
rooftop, and the LBPA antenna must be installed in the center of the vehicle’s trunk lid.
At this time, review all information presented in the Regulatory and Safety section of
this manual (begins on page 7). Both transmit-receive antennas must be installed in
accordance with the guidelines presented. To reduce human exposure to radio
frequency (RF) electromagnetic energy during transmit mode, refer to Table 1-1 and
observe MPE data. During installation, refer to Figure 8-1 and Figure 8-2 to determine
the best possible antenna mounting locations.
Antennas must be mounted in locations on the vehicle as illustrated and described in this section. See
Table 5-5and Table 5-6 for antenna descriptions. Always follow manufacturer’s instructions when
mounting an antenna. References to locations through apply to the locations illustrated in Figure 8-1
and Figure 8-2. Minimum LBPA-to-MRU antenna separation distances as specified in these figures and
elsewhere in this manual must be maintained.
8.1.1 Direct Center or Center-Rear of Rooftop for MRU Antenna
The center of the vehicle’s roof is the best location for the MRU antenna (location ). For optimal
performance, the mounting area under the antenna must be flat with a minimum radius of six (6) inches of
metal ground plane. Locating the antenna directly in the center of the roof will minimize human exposure
to RF electromagnetic energy.
If obstructions such as a light bar or another antenna prevent the MRU antenna from being mounted in the
direct center of the roof, 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 ).
The two transmit and receive antennas must be at least three (3) feet (0.92 meters) apart. See
Figure 8-1 and Figure 8-2. The radio-end of each antenna cable must be labeled so each
cable is connected to the correct radio antenna connector.
8.1.2 Center of Trunk Lid for LBPA Antenna
For a standard motor vehicle, the LBPA antenna should be located in the center of the vehicle’s trunk lid
(location ). Locating the antenna directly in the center of the lid will provide the best coverage, and
minimize human exposure to RF electromagnetic energy.
The antenna cable of Harris-approved antennas should never be cut to a shorter
length. Instead, excess cable must be tied and stowed. This not only prevents the
antenna from radiating above its intended or configured power, but it also allows for
future installation considerations such as a relocation of the mobile radio within the
vehicle. Installations requiring longer cables are to be treated as custom and
separately specified.
NOTE