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NME–3
Installation instructions
Try to route the antenna cable so that possible sources of disturbances
are avoided, as well anti–skid brake systems. The shorter the antenna
cable, the smaller the attenuation, and the better the performance of the
antenna. The antenna coupler should always be connected to the antenna
via a non–radiating cable (e.g. coax).
Most of the antennas today have adapted the mini–crimp connector sys-
tem which eliminates the need for special crimping tools and connectors.
If however the purchased antenna has traditional connectors, use only
proper connectors and tools. The phone uses mini a UHF female type an-
tenna connector for reasons of reliability and attenuation.
All installations should take into account any special requirements of the
customer. However, should the customer require an installation that is ille-
gal or unsafe these facts must be pointed out to the customer and a policy
of non–compliance adopted.
Power Distribution
The main supply for mobile phone is obtained from the vehicle battery, the
supply voltage may vary between 11,8 and 16 volts. Both the positive volt-
age and the grounding are taken directly from the battery, unless the ve-
hicle has other main voltage than +12 V. This minimizes the risk of distur-
bances from or to the telephone as well as guarantees loss–free power
distribution.
The connections to the battery should be carried out with care. Both the
negative and positive leads have 3A fuses, which must always be used. If
a fuse blows, replace it only with the same type and size fuse.
The power cables should be routed so that possible sources of distur-
bances are avoided. Also ABS–sensors and like should be avoided as far
as possible.
If the vehicle has +24 V electrical system (trucks, all–terrain vehicles ,
etc.), an external voltage reducer must be used. Since the properties of
the reducer are critical, it is recommended to use a reducer supplied by
the manufacturer. This reducer has good protections against transients
produced by vehicles electrical system and it is also capable of maintain-
ing stabile output during rapid changes in load current.
Page 8
PAMS
Technical Documentation
Issue 1 10/99
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