Alcoma ZENITH 80 User manual

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 
Microwavedatalink
ZENITH80
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Installationandoperationmanual
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Documentversion: 1.2
Published: 15.4.2011
Lastmodification: 08.01.2014www.alcoma.com

Contentpage.
1.INTRODUCTION .................................................................................................................................3
1.1BASICDATA........................................................................................................................................................... 5
2.DESCRIPTIONOFTHELINK .................................................................................................................7
2.1TXPOWERREGULATION........................................................................................................................................... 9
2.2THEPROTECTEDTERMINALBOXALSX..................................................................................................................... 10
2.3OUTDOORUNIT(ODU) .................................................................................................................................... 14
3.INSTALLATIONINSTRUCTIONS .........................................................................................................18
3.1STATIONINSTALLATION ......................................................................................................................................... 18
3.2EVALUATIONOFSUITABLEPLACEMENT..................................................................................................................... 18
3.3PLACEMENTOFTHEANTENNAONASUPPORTCONSTRUCTION....................................................................................... 19
3.4LOCALFREQUENCYCOORDINATION.......................................................................................................................... 21
3.5INSTALLATIONOFTHEANTENNASYSTEMS................................................................................................................. 21
3.6GROUNDING ....................................................................................................................................................... 24
3.7ATTACHMENTOFFEEDERTOTHEANTENNA ............................................................................................................... 25
3.8TYPICALODUWIRING...................................................................................................................................... 26
3.9USERSPACECOVERHANDLING ....................................................................................................................... 27
3.10INSTALLATIONOFINTERCONNECTCABLE ................................................................................................................... 28
3.11SFPOPTIONALMODULES ................................................................................................................................ 30
3.12INSTALLATIONOFOPTICALCONNECTORMOLEX106059 ........................................................................................... 31
3.13BEFOREPUTTINGTHERADIOLINKINTOOPERATION.................................................................................................... 32
3.14ACCESSORIES....................................................................................................................................................... 32
4.SETTINGOFTHERADIOLINKANDITSCOMMISSIONING..................................................................34
4.1POINTINGOFRADIORELAYLINK .............................................................................................................................. 35
4.2CONTROLCALCULATION ....................................................................................................................................... 40
4.3DIRECTCONNECTIONOFAMONITORINGPC............................................................................................................. 41
5.OPERATIONINSTRUCTIONS .............................................................................................................43
5.1OPERATION......................................................................................................................................................... 43
5.2EMERGENCYCONDITIONS ...................................................................................................................................... 44
5.3REPAIRS ............................................................................................................................................................. 44
5.4ENDINGOFOPERATION–ECOLOGICALLIQUIDATION.................................................................................................. 44
6.SAFETYCHECK .................................................................................................................................45
7.RADIORELAYLINKPARAMETERS.....................................................................................................46
7.1FREQUENCYPLAN80GHZ...................................................................................................................................... 46
7.2MODULATION,THRESHOLDSENSITIVITYANDTRANSFERCAPACITYOFTHELINK .............................................................. 46
7.3TECHNICALPARAMETERS ....................................................................................................................................... 47
7.4ENVIRONMENT .................................................................................................................................................... 48
7.5ANTENNASYSTEMS .............................................................................................................................................. 49
8.MAINEQUIPMENTDIMENSIONS .....................................................................................................50
8.1ODU–OUTDOORUNIT.................................................................................................................................... 50
8.2PROTECTEDTERMINALBOX .................................................................................................................................... 50
8.3ODUWITHANTENNA ........................................................................................................................................... 51
9.APPENDIXES ....................................................................................................................................53
9.1LISTOFFIGURES ................................................................................................................................................... 53
9.2LISTOFTABLES ..................................................................................................................................................... 53


MicrowaveradiorelaylinkZENITH80
3/521.2
1. INTRODUCTION
ALCOMAZENITH80iscompactandeasytodeployGigabitEthernetradiorelaylinksuitablefor
bothlastmilesandshorterbackbonelinks.Serviceavailabilityiscomparabletoopticalfiber.Typicallink
distanceis3–5kmfor99.99%availability.ZENITH80operatesin71–76/81–86frequencybandaccording
toECCrecommendation(05)07.ZENITH80supportsbothcopperandopticalfiberinterfaces.Thewhole
linkisbuiltintotheoutdoorunit.Indoorovervoltageprotectionterminalboxwiththegroundingboltis
available.
TheradiorelaylinkZENITH80asawholeoraspartsisnotintendedtobeusedbyuntrained
personnel.Installation,adjustmentsandmaintenancemustbeperformedonlybyapersonwithelectrical
qualificationstrainedbythemanufacturer.
WarningRFExposureCompliance
RF exposure must be considered at the time of licensing and installation.
ThisdevicecomplieswithHealthCanada’sSafetyCode.Theinstallerofthisdeviceshouldensurethat
RFradiationisnotemittedinexcessoftheHealthCanada’srequirement.Informationcanbeobtainedat
http://www.hc‐sc.gc.ca/ewh‐sem/pubs/radiation/radio_guide‐lignes_direct‐eng.php
CetappareilestconformeavecSantéCanadaCodedesécurité6.Leprogrammed’installationdecet
appareildoits’assurerquelesrayonnementsRFn’estpasémisau‐delàdeI’exigencedeSantéCanada.Les
informationspeuventêtreobtenues:http://www.hc‐sc.gc.ca/ewhsemt/pubs/radiation/radio_guide‐
lignes_direct‐eng.php
“Changesormodificationsnotexpresslyapprovedbythepartyresponsibleforcompliancecouldvoid
theuser’sauthoritytooperatetheequipment.”
"Leschangementsoumodificationsnonexpressémentapprouvésparlapartieresponsabledelacon‐
formitépourraientannulerl'autoritédel'utilisateuràutilisercetéquipement."
Pleasereadthisoperationmanualcarefullybeforeinstallationandoperationoftheduplexmicrowave
linkfordatatransmissionALCOMAZENITH80.Pleasepayincreasedattentiontothesafetyinstructionsthat
aremarkedlikethisinthetext:

MicrowaveradiorelaylinkZENITH80
4/521.2
WARNING
Violatingofthismarkedsafetyinstructionscancauseseriousinjurytopersonnel.
CAUTION
Violatingofthismarkedinstructionscancausedamagetotheequipment.
TIMEEXPIRATION
Linkistimeexpired.DateofexpirationismarkedonODU,ininvoiceandindagnostic
systemASDClient–menuSupervisor‐Identification‐Local/Remotestation.Contact
selesdepartmentofyoursupplierbeforeexpirationdateandaskforunblockinng
softwarecodes.Onlydiagnosticdataaretransferedafterexpirationdate.


MicrowaveradiorelaylinkZENITH80 
5/521.2
1.1 BASICDATA
•Licensedfrequencyband80GHz(71‐76a81‐86GHz)
•PointtoPointtypelink
•TheZENITH80linkisdesignedasunattended
•Theuserdatatransmissioncapacityis1150Mbit/s
•Thetotaltransmissioncapacityis1250Mbit/s
•Channelbandwidthis1,5GHz
•DigitalmodulationDBPSK
•ATPC‐automaticoutputregulation(ATPClowersmutualinterferenceoflinksandlowers
operationalcosts)
•AdvancedFEC‐forwarderrorcorrection
•Fullduplexoperation
•Verticalorhorizontalpolarization
•Interfaces:2Ethernet100Base‐TXchannelsmarkedasUserline2andUserline3
•OptionalSFPslotforEthernet1000Base‐LX(SX)markedasUserline4.
•Oneortwoindependentuserdatachannelsaretransmitted,diagnosticdatacanbeoptionally
transmittedinanyofthose.
•ThelinkconsistsoftheoutdoorODUunit,protectedterminalboxALS1‐GEthorALS1‐2GEthandthe
appropriatecables
•ThelinkcanbesupervisedbytheASDClientprogram,throughawebinterface,hyperterminal,or
SNMPprotocolVer.1
•ForthemaintenanceanddiagnosticprogramASDClientactualversionseethefollowingwebpage:
www.alcoma.com
•TheradiorelaylinkZENITH80enablesusingoftheantennatypesALCOMAAL1‐80/APR,AL2‐
80/APR
•ODUcontainstheacousticsignalizationofincomingsignallevelRSSI
•ODUissealed,warrantyisvoidifsealremovedorbroken


WARNING
Themicrowavelinkoutdoorunitcontainsamicrowavetransmitter,whichcausesthehealth
riskofnon‐ionizingradiationwhileinoperation.Itisdangeroustolookdirectlyintothe
antenna,orstaycloseinfrontofit,whilethetransmitterisinoperation.Thedanger
increasesindirectproportiontothetransmittedoutput.Itisnotallowedtoswitchonthe
transmitterwithoutconnectedparabolicantenna.Duringworkonandpresencebythe
antenna,whilethetransmitterisinoperation.


MicrowaveradiorelaylinkZENITH80 
6/521.2
TheradiorelaystationZENITH80consistsofthreemainparts:
1. Theoutdoormicrowaveunit(ODU)thatisintegralwiththeantennacontains:
oTheRFblockthatincludesthemicrowavetransmitter,receiver,andfilters.RegardingtoTx
frequencyODUsaremadeintwoversions:
Aforhigherfrequencyrange
Bforlowerfrequencyrange
Respectiveunitsmakeupduplexpair,e.g.A‐B.
oThedatablockthatincludes1Ethernet1000switch,amodemandthemonitoringsystem
supervisedbyacontroller.ThepowersupplyblockconsistsofDC‐DCconvertors.
2. Theantennasystemwiththeparabolicantenna,thefeedelementandthepoleattachment.
3. ConsideringplacementofthedatablockinODU,thestationZENITH80hasanindoorunit
reducedtotheprotectedterminalboxALS1‐GEth(RP)orALS1‐2GEth(RP)thatensures
transmissionofcustomerdata,poweringofthestation,andprotectionagainstthe
atmosphericoriginovervoltageandovercurrent.(Theprotectedterminalboxismarkedas
ALS1xinthefurthertext.)

ODUcanbeconnectedtothemicrowaveparabolicantennasofthetypesALCOMAAL1‐80/APR
(Ø0,35m)AL2‐80/APR(Ø0,65m).Theseantennasarestandardequippedbyicingprotection(radome)for
useindemandingclimaticconditions.ThesimplyremovableODUisintegratedwiththeantennasystem
intoonecompactwhole.
InterconnectionbetweentheprotectedterminalboxandODUisdonebyadoubleshieldedoutside
cable(S‐STPCat7)with4pairsofconductorswiththe100Ωimpedance.IncaseofusingtwometallicGEth
interfacestwointerconnectingcablesmustbeused.TheLINE3linkcabletransmitscustomerdataand
poweringforODU.ODUmonitoringsignalsmaybetransmittedbyeitherLINE3orLINE2linkcable.
OpticalinterconnectingcablemustbechosenaccordingtousedSFPmoduletype.Itisrecommended
touseopticaloutsidecable.SFPmoduleusedinODUmaybeeither1000Base‐LXSinglemode(1310nm)or
1000Base‐SXmultimode(850nm).DisassembledopticalconnectorisastandardaccessoryofSFPmodule
equippedODU.Customermayoptionallyordercompleteconnectorizedinterconnectionopticalcableof
appropriatelength.


CAUTION
SFPmodulemaybeinstalledonlytoODUsequippedwithopticalcableconnector.




MicrowaveradiorelaylinkZENITH80 
7/521.2
2. DESCRIPTIONOFTHELINK
UserdataareconnectedtotheprotectedterminalboxALS1xbythestandardRJ45connectors.The
two‐stageterminalprotectionlimitsbreakdownscausedbyovervoltageoriginatinginatmospheric
electricity,orduetoindustrialbreakdowns.Theprotectedterminalboxcontainsuserselectablejumpers
enablingitsoptimumgroundingandadjustment.
ODUispoweredusingtheprotectedterminalbox.Thepowersupplyintherangeof+36to+72V,with
thetypicalvalueof+48V,isprotectedbythetubethermalfuseT2.0A.Thepresenceofsupplyvoltageis
indicatedbyagreenLED.ThesupplyvoltageistransportedtoODUbyallfourpairsofconnectingcable
conductors.


CAUTION
UseonlyprotectedterminalboxmarkedALS1‐GEth(121/516*29)orALS1‐2GEth
(121/516*30)forZENITH80link.
ItisimportanttokeepproperlinkofallconnectingcableconductorsbothinODUand
ALS1x.
Thereisdangerofequipmentdamageincasethatthelinksarenotconnectedproperly.

ThemainlinepowersupplyofthecategorySELVaccordingtotheEN60950"Informationtechnology‐
Safetyofinformationtechnologyequipment…".
ThepowercableALS1xisconnectedbytheconnectorthatisscrewedontheboxoftheprotected
terminalbox,andsoguaranteesareliableconnection.
TheprotectedterminalboxisconnectedtoODUbyasingleshieldedcablewith4pairsofconductors.
Thiscableisbothonthesideoftheprotectedterminalbox,andtheODUsideconnectedbythe"Krone"
cuttingboxs.Thelinkcablepassesthroughcablescrew‐ingrommetsonbothsides,andsoitisfirmly
attachedtothebox.Thetotallengthofthelinkcableandthecablethatbringsdataintotheprotected
terminalboxcanbemax.100mlongforthe100Mb/sEthernet,fortheEthernetspeedof1000Mb/sitcan
bemax.90mlong.TheselengthsaresetandverifiedfortherecommendedcableS‐STPCat.7.byACOME.
TheterminalboxALSxispassiveandthecablelengthmustbeconsideredfromtheterminaluserdeviceall
thewaytoODU.
ThemechanicaldesignoftheprotectedterminalboxassumesinstallationonTS35DINrail.The
protectedterminalboxallowstobringtheconnectioncablewithODUtothefrontpanel.Customerdata
andthepowersupplycanbebroughttothefrontpanel
ThreeprotectedterminalboxesALS1xcanbejoinedandinstalledintothe19"rackof1Uheight.
Joiningprofilesandrackmountingprofilesmustbeaddedinthatcase.
TheODUinputhassimilarovervoltageprotectionastheoneintheprotectedterminalbox,including
aseparatesupplyvoltage.Thesupplyvoltageseparatedintheovervoltageprotectionisbroughttothe
switch‐onpowersupply.ActivityoftheODUsupplyisindicatedbythegreenLEDplacedonthemother
boardinthespaceoftheuserterminalarea.
ThehighfrequencyblockoftheZENITH80linkconsistsofamicrowavereceiver,transmitter,
microwaveoscillatorsandothersupportcircuits.
Microwaveoscillatorsgeneratesignalsformixersinthereceiverandtransmitter.Itsfrequencyis
controlledbythePLLloop.Accuracyandstabilityofthefrequencyadjustmentisdeterminedbyacrystal
oscillator.
Theintermediatefrequencysignalatthe12.75GHzfrequencyfromthemodemismixedwiththe
signalfromamicrowaveoscillator,filtered,andpoweramplified.Thesignalgoesthroughabranch,where
thetransmittedoutputdetectioncircuitresides.Fromtherethetransmittersignalgoesthroughadiplexer
tothetransmittingantenna.


MicrowaveradiorelaylinkZENITH80 
8/521.2
Areceivedsignalfromtheparabolicantennaisledthroughthediplexertothereceiver.Thereitis
amplifiedandmixedtotheintermediatefrequencyof3.75GHzandfurtheramplified.Fromtherethe
signalgoestoamodem.

Figure1TheblockschematicoftheZENITH80link

CAUTION
UseonlyprotectedterminalboxmarkedALS1‐GEth(121/516*29)orALS1‐2GEth(121/516*30)
forZENITH80link.
Thereisdangerofequipmentdamageincaseusingotherterminalbox.
MW
Powersuply
Motherboard
Line3+M
g
mt
Power=48V
(36÷72V)ALS1x
DC‐DCconverter
=48V
Interconnecting
cables
Surge
protection
Muldex
Modem
DBPSK
µP
MW
receiver
MW
transmitter
PLL PLL
‐12V
Z
p
ráva
+12V
+5V
+3
,
3V
+2
,
5V
‐5V
Udet
Interface
RS232C
RSSI
Line3
Line2
Surge
protection
Diagnosti
100
SFP10/100/1000
GEthswitch
100
Line3+power
DC–DC
converter
+8
,
8V
+5
,
5V
‐5V


MicrowaveradiorelaylinkZENITH80 
9/521.2

Thedemodulatedsignalgoesfromthemodemtoamuldex,whereuserdata(Ethernet)areseparated
fromthediagnosticdata.Theuserdataaresenttotheprotectedterminalboxagainthroughthe
overvoltageprotectionbyaconnectioncablewith4pairsofconductors.
ThevoltageontheRSSIconnector(

figure6)isproportionatetotheintensityofthesignalreceivedfromtheoppositestation.Thisvoltage
determinestheheightofthetonefortheacoustictransformerthatservesasanindicatorduringpointing
ofthelink.
2.1 TXPOWERREGULATION
TheoutputpowerissetbymanufacturerinconformitywithmaximumEIRPpowercondittions.EIRP
calculateswithbothTransmitteroutputbowerandantennagain.Therearetwodifferentconceptsof
ZENITH80linkoutputpowerregulationconcept:
1. Thebasicpossibilityistosetoutputpowerfrommaximum20dBminstepsof1dBand20dB
rangewithkeepingitstimeandtemperaturestability.Itispossibletosettheoutputpowerfrom
theASDdiagnosticprogram.Thepowerisregulatedanddisplaidbasedoninformationfromlocal
transmitter.MicrowavepartofODUisequippedwithbranchwheretransmittedoutputdetection
circuitwithmicrowavedioderesides.DetectedvalueisusedbothforTxpowerregulationand
displaying.
2. AdvancedfunctionofATPC(automatictransmitpowercontrol)isbasedonregulationofoutput
poweraccordingtotheconditionsofelectromagneticwavespropagation.Itdecreasestheoutput
powerduringoptimalconditionsandminimizespossibilitiesofinterferenceswithotherlinks.The
powerisregulatedtothecertainselectedlevelbasedonreceiversignallevelfromtheremote
station.



MicrowaveradiorelaylinkZENITH80 
10/521.2
2.2 THEPROTECTEDTERMINALBOXALSX
TheprotectedterminalboxALS1xisdesignatedforaconcurrenttransmissionoftwoEthernet
channels.TheprotectedterminalboxALS1xprovidesprotectionofthecustomerdatatransmissionandthe
powersupplyofthestationagainstovervoltageofatmosphericorigin.ItsplitstheODUsupplycurrenttoall
fourpairsofconductorsofthecableconnectingitwithODU.ALS1‐GEthandALS1‐2GEthmaybeusedwith
ALxxFMP165,ALxxFMP360andandZENITH80links(seeODUsticker).Protectedterminalboxesare
markedasALS1‐GEth(121/516*29)andALS2‐GEth(121/516*30).
•ALS1xshouldbemountedtoDINrailTS35.
•ALS1xcanbeplacedasstand‐aloneto19”rackusingoptionalmountingkit
•3ALS1xmaybejoinedandmountedasone19”1Uhighunit.Specialoptionalmountingkit
shallbeusedforsuchinstallation.Boltsshouldbeloosenbeforemountingjoiningprofilesto
ALS1x.TighteningofboltsensureslockingofjoinedALS1xboxes.


Figure2ProtectedterminalboxALS1‐GEthRPFigure3ProtectedterminalboxALS1‐2GEthRP


Figure4JoiningofALS1xterminalboxesto19”unit



MicrowaveradiorelaylinkZENITH80 
11/521.2
2.2.1 InputConnectors
Powersupplyconnectoronthefrontpanel

Theconnectioncableforthisconnectorendswiththesockettype1777989Phoenix(0395340002Molex).
TypedesignationcorrespondstothePhoenix(Molex)catalogue.

RJ45connectorsforuserlineinput
Userlines2and3
WiringPinsDescription
1A+
2A‐
3B+
4C+
5C‐
6B‐
7D+
8D‐
Table1RJ45connectorwiring–userlinesLine2aLine3

TheAutoMDIXfunctionassuresswitchingofRXandTXasneeded.


MicrowaveradiorelaylinkZENITH80 
12/521.2
2.2.2 OutputConnectors
Cuttingbox"Krone"fortheline2


Line2doesnotcontainpowerfeeding.
(ConnectoriswiredasamirrorofODUconnector).

Themarkingofcableconductors
WiringPins Description
S‐STPCat7
1A+White
2A‐ Green
3B+White
4B‐ Orange
5C+Blue
6C‐ White
7D+White



8D‐ Brown
Table2Theprotectedterminalbox‐cuttingbox“KRONE“fortheline2
Cuttingbox"Krone"fortheline3+Power

Line2containspowerfeeding.
(ConnectoriswiredasamirrorofODUconnector).

Themarkingofcable
conductors

Powerfeeding
WiringPinsDescription
S‐STPCat7
1A+White
2A‐ Green‐
3B+White
4B‐ Orange+
5C+Blue
6C‐ White‐
7D+White


18

8D‐ Brown+
Table3Theprotectedterminalbox‐cuttingbox“KRONE“fortheline3+power


ThecableACOMES‐STPCat7hasitsshieldingconnectedtogroundthroughthemetalinput
grommet.Ifthecablehastheshieldingcomingoutthroughoneconductoritcanbeconnected
toanyshieldingpin.



MicrowaveradiorelaylinkZENITH80 
13/521.2
2.2.3 Indikace
Board:Protectedterminalbox
LEDAbbreviationMeaning
G
POWERPowerON–indicationoftheradiostationbeingswitchedon

2.2.4 CablesinKRONEcuttingboxes


Figure5CablewiringinALS1‐GEthandALS1‐2GEthboxes
ALS1‐GEth ALS1‐2GEth


MicrowaveradiorelaylinkZENITH80 
14/521.2
2.3 OUTDOORUNIT(ODU)





Figure6TheODUconnectionplaces
Theoutdoorunit(ODU)withitsmicrowaveanddataelectronicmodulesisplacedintoametalalloy
boxwithcoverallowingopeninguserterminalspaceneededforcableconnectionanddiagnosticsofthe
link.ODUcanbeattachedtoAL1‐80/APRandAL2‐80/APRantennasbyfourlatches.Feederisconnectedto
parabola.AntennasstaypointedwhenODUmustbedismounted.
Userterminalspace
Optionallygromet
ofthesecond
interconnecting
cableGEth2(Line2)
BoltM8
GroundingofODU
ConnectorBNC
OutputofURSSI
ODUTypeA/B
Serialnumber
MACaddress
TXfrequency
Grometof
interconnecting
cableGEth1(Line1)
Optionallyconnector
ofSFPmodul(Line4)
P/N
Type
N/V
Duplexspacing


MicrowaveradiorelaylinkZENITH80 
15/521.2
Inputconnector
Cuttingbox„Krone“fortheline2
Themarkingofcable
conductors
WiringPins Description
S‐STPCat7
1D‐ Brown
2D+White
3C‐ White
4C+Blue
5B‐ Orange
6B+White
7A‐ Green


18
8A+white
ForsimplerdescriptionthetabledoesnotconsidertheactivefunctionsAUTOMDIX
Table4Theoutdoorunit‐cuttingbox“KRONE“fortheline2


Cuttingbox"Krone"fortheline3+power
Themarkingofcable
conductors

Powerfeeding
WiringPinsDescription
S‐STPCat7
1D‐ Brown
2D+White+
3C‐ White
4C+Blue‐
5B‐ Orange
6B+White+
7A‐ Green


18

8A+white‐
ShieldingS1÷S4forthecableACOMES‐STPCat7isconnectedtogroundthroughthemetalinput
grommet.
Table5Theoutdoorunit‐cuttingbox“KRONE“fortheline3+power



MicrowaveradiorelaylinkZENITH80 
16/521.2

Figure7UserspaceODU1xGEth



Figure8UserspaceODU2xGEth
Indication

LEDDescriptionMeaning


MicrowaveradiorelaylinkZENITH80 
17/521.2
R
RXLEVELLOWLowleveloftheinputmicrowavesignal
R
HIGHBERIncreasederrorsonthemicrowavepath
R
FRAMELOSSLossofframesync
G
OK
Blinks=monitoringsystemdoesnotregisteranyerrorstatesat
themoment.Lighton/Lightoff=monitoringsystemindicates
anerrorstate
YG
SFPLink/
Activity
Orange=LinkonSFP.Green=activity
G
PowerIndicationforstableoutputvoltageof+3.3V
Table6MeaningofLEDsintheODUuserspace
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Rotaryswitchfunctions
Therotaryswitchislocatedonthemotherboard.ItisaccessibleafterflippingoffthelidontheODU
cover.Thestationdoesnothaveanyotherelementsthatcanbechangedduringnormaloperation.
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PositionDescription
0Normalstationoperation
1Pointing
2÷FReserve–notusedyet
Table7DescriptionoffunctionsoftherotaryswitchintheODUuserspace
TherotaryswitchinthepositionPointing(1)alsoswitchesoffatransmitterofthelocalstation.
Switchingoffoftheoutputalsointheremotestationbytherotaryswitchcanbeusedtofindalevelof
interferencesignals(backgroundnoise)ongivenchannels.
TheZENITH80stationisoptimallytunedduringmanufacture,setandtestedinaccordancewith
guaranteedparametersandcustomerrequirements.Ifthereisanewrequirementtoretunetoadifferent
channelorforaconfigurationchange(possibleonthisequipment)afterinstallationorinspection,itis
possibletodothisworkusingthemonitoringprogramonly.Retuningtoadifferentfrequencyrangethat
requiresreplacementofmicrowavefilterscanbedoneatthemanufactureronly.
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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telecommunication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immediately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.

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MicrowaveradiorelaylinkZENITH80 
19/521.2
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Figure9TheFresnelzone
Figure10showssituationwhenasolidobjectpenetratesaFresnelzoneofsignalpropagation.The
obstacle,justliketheoneonthefigure,causesbendingofthebeamalongthesharpedge.Thisbeamthen
arrivesatthereceiverantennalittlebitlaterthanthedirectbeam.Inotherwordstherearetwoidentical
signalscomingtotheantenna,butwithvariousphases,whichstronglydegradesthesignalquality;andthis
cancausetemporarybreakindatatransmission.Treesorother“soft”objectsinfringingontheFresnel
zoneattenuatetheradiosignal.Inshort:Thefactthatyoucanseetheoppositesidedoesnotmeanthat
youcansetupaqualityradiolink.
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3.3 PLACEMENTOFTHEANTENNAONASUPPORTCONSTRUCTION
Theantennaofradiolinkmustbeplacedsufficientlyfarawayfromotherantennas,inordertoavoid
undesirableperturbationofradiosignal.Badlyinstalledantennawillcausedeteriorationofourtransmitted
signalandalsoofthesignalsofneighboringlinks.Duringinstallationofaradiorelaylinkweneedto
calculatewithadistancefromtheroofedgeordifferentobstaclesthatcanbepresentontheroof(A/C,
elevatorshaft…).Thefollowingfiguresshowincorrectandcorrectwaysofinstallationofradiorelaylink
antennaonthesupportingconstruction.
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Figure10 IAPRoperplacementofantennaonmountingpipe
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Fresnelzone
Lineofsight
1,4m
0,3m
RooflineRoofline
1,3mMorethan0,3m

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MicrowaveradiorelaylinkZENITH80 
20/521.2
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Figure11 Properplacementofantennaonmountingpipe
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Obstacle
distance
[m]
00.30.60.91.21.51.82.12.42.83.16.19.212>12.5
Heightof
antenna
aboveob‐
stacle[m]
0.30.60.91.21.31.41.41.41.41.51.51.82.12.32.5
Table8Recommendedantennaplacementsconsideringadistancefromanobstacle1

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1Tablevaluescorrespondtoanaverageantennasizeandnormalclimaticconditions.Parametersoftheusedradio
linktypeandclimaticconditionshavetobealwaystakenintoaccount.
1,4m
0,3m
RooflineRoofline
1,3m
Morethan0,3m
Roofline Roofline
0,3m
0,6m
Morethan12,5m