Alcoma ZENITH 80 - Installation Instructions for ZENITH 80; Station Installation Procedures; Evaluating Suitable Placement

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MicrowaveradiorelaylinkZENITH80 
 18/52 1.2
3. INSTALLATIONINSTRUCTIONS
3.1 STATIONINSTALLATION
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Warning!
Low voltage equipment, electromagnetic and telecommu nication standards are applicable
toradiorelaylinkZENITH80.
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Warning!
The radio relay link ZENITH  80 is not intended to be used by non‐specialist personnel.
Installation,adjustingandmaintenancemustbeperformedbythemanufacturerinstructed
personnelwithelectrotechnicalqualifications.
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Allowedinstallationtorques:
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Boltandnut Torque
M10 35Nm
M8 17Nm
M6 11Nm
M5 5Nm
M4 3Nm
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Allboltsandnutsshouldbegreasedbeforeinstallation.
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3.2 EVALUATIONOFSUITABLEPLACEMENT
Forinstallationandproperoperationoftheradiolinkthefollowingmustbeprovided:
 Directopticalvisibility
 PlaceforattachmentofantennawithODU
 AplacefortheprotectedterminalboxALS1x
 PathtolaytheODU–ALS1xconnectioncable
Guaranteeddirect visibility isnotalwayssufficient guarantee
of a quality connection.A condition for
atroublefreepropagationofelectromagneticwavesisapureradiovisibility.Iffixedobjects,liketreetops,
mountains or buildings are toocloseto the signalroute,they candistortor attenuatearadio signal.This
occurs even in cases when these
obstructions do not prevent direct visibility. This phenomenon can be
explainedbytheradiobeamFresnelzone–anellipticalareathatimmedia tely surroundsthedirectvisibility
axis(thelinebetweenlinkantennas).Sizeofthiszonevariesdependingonthehoplengthandradiosignal
frequency. The Fresnel zonemust
 be calculated before design of  the wirelesslink and it must beverified
thatitwillnotbedisturbedbyanyobstacles.