Installation Instructions

MOBILE TERMINAL INSTALLATION HANDBOOK (BER VERSION B)
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IH – PS8432EAE01 09/2001
4.3 EQUIPMENT INSTALLATION PROCEDURE
4.3.1 Antenna
The antenna should be installed vertically, preferably in the centre of a
horizontal metal base. If the vehicle roof is not made of metal, it is essential
to fit a metal sheet or mesh under the antenna base. The base should be
as large as possible.
If the antenna cannot be installed on the roof for major reasons, a
compromise should be sought bearing in mind that a reduction in
performance will result.
Installing the antenna on one of the wings of the car will provide the worst
radiation diagram.
If, however, such a location has to be considered, the antenna should be
installed mid way along the wing to obtain the best result.
The antenna base must be carefully grounded. To provide a good
electrical contact, strip the paint under the antenna base and protect the
bodywork against corrosion using copper charged conducting grease
(e.g.: PCC80 KRISTAL), which also helps to ensure a durable electrical
contact.
The electronic devices of some vehicles may be disturbed by terminal
transmission, and may conversely disturb the mobile terminal by spurious
radiation.
The human body should not be subjected either to prolonged exposure
of an antenna located too close (20 cm) without a metal shield being
interposed.
For a temporary installation, use an antenna with a magnetic base placed
in the centre of the roof.
Note: The transceiver is protected in the event of accidental switching
over to transmit without an antenna.
CAUTION: Whenever work has been carried out on the antenna
circuit, it is essential to check that the SWR
(Standing Wave Ratio) remains less than 1.5.