Radwin 2000 D+ - Page 18

RADWIN2000D+UserManual Release3.6.00 3‐2
Stage1:PreliminarySurvey Chapter3
• Compass
Stage2:PhysicalSurvey
• 100metertapemeasure
• Ohmmeter,tocheckgroundconnection
• Binoculars
• Map
• Digitalcamera
• Paper,pencil,andaclipboard
• GPSdevice(optional)
• Compass(optional)
Stage3:RFSurvey
• SpectrumAnalyzerwithMaxHoldfunctionandscreencapturefacilitythatcanstore
multipleimages,fordocumentationpurposes
• RFaccessories(connectorsandcables)
• Communicationdevices(forexample,cellularphones,orasetofwalkie‐talkies)
3.3Stage1:PreliminarySurvey
Apreliminarysurveyisnecessarybeforevisitingpotentialinstallationsites.Asmuchdetailas
possibleshouldbeobtainedaboutthetwodesignatedODUinstallationsitesandthearea
betweenthem.
 Toperformapreliminarysur vey:
1.Markthetwodesignatedinstallationsitesonatopographicmapofthearea.
2.Measurethedistancebetweenthesites;checkthatitiswithinthespecifiedrangeof
theequipment.
3.Ontheurbanmap,checkfordevelopedareassituatedbetweenthetwoinstallation
sites.
Payattentiontotheseareaswhenperformingthephysicalsitesurvey;there
maybe tallbuildings,RFtowers,ortransmitters,whichcouldcauseinterferenceto
thelink.
4.Checktheareabetweenthetwositesforobstructionssuchas:
• Highground‐hillsormountains
• Lakesorlargebodiesofwater.Water
hasareflectioneffectonRFsignalslikeabuilding.
Thistypeofreflectioncausesthereceivedamplitudetobereduced.Asaruleofthumb,
thepresenceofalargebodyofwaterbetweenthelinksitesmaydoubletherequired
antenna height.
5.DetermineandrecordthecompassbearingsbetweenbothODUs,relativetonorth.
6.Iftherear eobstructionsbetweenthetwosites,calculatetheFresnelZone(seeLink
BudgetCalculatorfordetails).
7.Ifthesitechosendoesnotmeetrequirements,consideralternative sites.