User's Manual

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AdvancedRFTechnologies,Inc.  60
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7.2.2 HECommissioning
HEcommissioningiscomposedofHEBCUandHERFUcommissioning.TheHEBCUisanoptionalcomponent
andshouldbeusedwhenWPSs’signalsarebeingusedinthesamefrequencyband.
7.2.2.1 Compositepower
ToperformHEcommissioning, theusershouldcalculatedownlinkcomposite inputlevel
and add theproper
amountofbreathroomrequiredforriseintraffic.
 Informationthatisneededtocalculatecommissioninglevelsare:
‐ Servicefrequencyband
‐ Servicetechnology
‐ Thenumberofwirelessserviceprovider
‐ Thenumberofcarrierspertechnology
‐ Thenumberofbandsharing
sameamplifier
7.2.2.1.1 DLCompositeInputLevelCalculationsforHECommissioning
7.2.2.1.1.1 SingleWSPinafrequencyband
 MeasuretheoutputpoweroftheBTSsignalthatwillbeinsertedintotheRFUusingaSpectrumAnalyzer.
‐ If input signal includes more than one technology,then measure the composite
 power of each
technology.
 BasedonTable7‐2,calculatethemaximumcompositeinputlevelbyusingthefollowingformula:
o “OutputpowerofBTSoftechnologybeingused”+“back‐offvalue”(refertoTable7‐2)
‐ If calculated composite HE DL input power exceeds the permitted
maximum input range, then
additionalattenuationwillneedtobeaddedsothatthecalculatedHEDLinputpowerdoesnot
exceed25dBm.
Table7‐2 Back‐offvalueforeachtechnologyduetotrafficbreathing
Technology ConnectedtoBTS
CDMA 6~8dB
1xEVDO 6~8dB
WCDMA 8~10dB
HSPA 8~10dB
iDEN 0~3dB
GSM 0~3dB
LTE 8~10dB
7.2.2.1.1.2 MultipleWSPsinafrequencyband
 When multiple WSPs exist in a frequency band at the same time, the ADX‐H‐BCU can be used to
combine/dividethesignalsreceivedfrommultipleWSPs.
‐ TheADX‐H‐BCUcanreceiveupto3incomingDLsignals.Eachincomingsignal
canbeattenuated
individuallyallowingtheusertospecifypowerratiostocontrolthepowerpercarrier.
‐ ThedownlinkpathofBCUhastheinputrangefrom0to25dBm.
‐ IfthedownlinkoutputofBCUexceedsDLoutputALClevelsetbyuser,ALCfunctionwillactivate
and
limittheDLoutputfromexceedingthedefinedALClevel.
‐ TheDLoutputofADX‐H‐BCUistransferredtotheDLinputofRFU.
 MeasuretheoutputpoweroftheBTSsignalthatwillbeinsertedintotheBCUusingaSpectrumAnalyzer.
‐ If input signal
includes morethan one technology, then measurethecompositepower of each
technology.
 BasedonTable7‐2,calculatethemaximumcompositeinputlevelbyusingthefollowingformula:
o “OutputpowerofBTSoft echnologybeingused”+“back‐offvalue”(refertoTable7‐2)