Nokia NME-3 Series Installation Instructions Manual

Also see for NME-3 Series: Assembly instructions

Contents

Nokia NME-3 Series Installation Instructions Manual Manual pdf 8 page image

PAMSTechnical DocumentationNME–3Installation instructionsPage 8 Issue 1 10/99Try to route the antenna cable so that possible sources of disturbancesare avoided, as well anti–skid brake systems. The shorter the antennacable, the smaller the attenuation, and the better the performance of theantenna. The antenna coupler should always be connected to the antennavia 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 onlyproper 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 thecustomer. However, should the customer require an installation that is ille-gal or unsafe these facts must be pointed out to the customer and a policyof non–compliance adopted.Power DistributionThe main supply for mobile phone is obtained from the vehicle battery, thesupply 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 powerdistribution.The connections to the battery should be carried out with care. Both thenegative and positive leads have 3A fuses, which must always be used. Ifa 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 faras possible.If the vehicle has +24 V electrical system (trucks, all–terrain vehicles ,etc.), an external voltage reducer must be used. Since the properties ofthe reducer are critical, it is recommended to use a reducer supplied bythe manufacturer. This reducer has good protections against transientsproduced by vehicles electrical system and it is also capable of maintain-ing stabile output during rapid changes in load current.