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CableModem測試介紹1.BPISettingmacaddressandSNintoCM,thenuptatathestatusintodatabase2.DS-calDownstreamcalibrationonspecificfrequenciesandpowers3.DS-VERVerifydifferencebetweenCMdownstreampowerreportandthedesiredsignals4.US-CAL&VerUpstreamcalibrationonspecificfrequenciesandpowers,thenverifydifferencebetweenCM’sUPpowerandspectrumreceivedFunctionalverifyCM’sDownstream/upstreampoweraccuracy.VerifyCM’sSNR&PER,CER6.ISDNFunctionISDNphoneFunctionaltest7.FinalTestChecktheCMhaspassedalloftheteststations,verifySNandMAC,thendefaultthefactorysetting.2.DS-CALPerformCM’sdownstreamcalibrationonspecificfrequenciesandpowers.Singalgeneratoroutputasignal(540M,-60dBm)CMreceivethespecificsignal,thenturntheAGCCMgetAGCValueandsavetheAGCtableUpdatethestatusintoDataBase3.DS-VerVerifydifferencebetweenCMdownstreampowerreportandthedesiredsignalsFeedaknownsignal(knownfrequencyandknownpower)ferequency:106MHz,159MHz,211MHz,263MHz,317MHz,372MHz,428MHz,542MHz,605MHz,665MHz,721MHz,776MHz,830MHzPower:15dBm,0dbm,-15dBmb.getAGCpowertablereportfromCMc.differencebetweenCMpowerreportandthedesiredsignalshouldbewithin2.5dBmofallthefrequencyandpowerd.UpdateteststatusintoDataBase4.US_CAL/US_VerUpstreamcalibrationonspecificfrequenciesandpowers,thenverifydifferencebetweenCM’sUPpowerandspectrumreceivedCMupstreamaknownsignal(knownfrequencyandknownpower)frequency:5.1MHz,10MHz,15MHz,20MHz,25MHz,30MHz,35MHz,40MHz,45MHz,50MHz,55MHz,60MHz,63MHz,64.9MHzPower:48dBmb.SpectrummeasurethesignalandtunetheAGCdatac.AfterUS_CAL,CMupstreamaknownsignal(knownfrequencyandknownpower)frequency:8.2MHz,17MHz,25MHz,20MHz,25MHz,33MHz,47MHz,53MHz,61.8MHzPower:55dBmd.differencebetweenCMupstreampowerandthespectrummeasurepower,itshouldbewithin2.0dBmofallthefrequencyandpowere.UpdateteststatusintoDataBase5.FunctionalverifyCM’sDownstream/upstreampoweraccuracyonthreespecificfrequencys.VerifyCM’sSNR&PERa.CMonlinewithCMTSb.Checkdownstreamreportpower,differenceonCMTSoutputpower,itshouldbewithin2.5dBmofallthefrequen
