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1、有线数字电视噪声干扰初探ChinacableTV2010(2004)CHINADIGITALCABLETVDIGITALTVMiddleimageclassificationnumber:TN949.197documentidentificationcode:Barticlenumber:1007-7022(2010)20004-041-03CabledigitaltelevisionnoiseinterfereswiththefirstdetectionWujohua,yujinliang(wujiangcableTVnetworklimited,jiangsuwujia
2、ng215200)Take:thewujiangdigitalTVplatformwascompletedinJune2007,anditwasputintotrialoperationBeginning,thesystemisofficiallyputintobusinessoperation.IncombinationwiththetechnicalmaintenanceofwujiangdigitalTV,thenoiseiscausedbythefailureofcableTVThereasonfortheformationofdisturbanceisexplor
3、atoryanalysis,andsomecountermeasuresareproposed.Keywords:digitaltelevision;Noise;Phasenoise;Combinedintermodulationnoise;ThecircuitnoiseBriefAnalysisofInterferenceinCableDTVTransmission一WUQiao一hua,YU,Jin,liang(WujiangCableBroadcastTelevisionNetworkCO.,Ltd,JiangsuWujiang215200,China)Abstrac
4、t:WujiangcabledigitalTVplatformhasbeencompletedinJune2007andputintotrialoperation.InAugus,tthesameyear,theoverallconversionintodigitaltelevisioninWujiangbeganTocommercialoperation・CombiningwiththetechnicalmaintenanceofdigitaltelevisioninWujiang,thispaperTheinterferenceintransmissionofcable
5、digitalTV,whichwascausedbyvariouskindsofnoise・Thenitmadesomeworthlearningsolutionsandpreventivemeasures・Keywords:digitalTV;Noise;Phasenoise;Intermodulationnoise;circuitnoiseThewujiangdigitalTVplatformwascompletedandcastinJune2007Inthecommercialoperation,morethan90setsofdigitalTVprogramsand
6、2setsaresentHDTVshowsand10digitalaudiobroadcasts,currentlyinwujiangcityThewholecityhasbeencompleted,with240,000digitalTVsubscribers・DigitaltelevisionisthemostTheweaklinkistechnicalserviceandmaintenance,throughmaintenanceandmaintenancepractice,IThefailureofcabledigitaltelevisionduetotheinte
7、rferenceoftransmissionnetworknoiseSomeideasareintroducedhere・Withthedevelopmentoftechnology,thecableTVtransmissionnetworkiswidelyusedinopticalfiberThetransmissionsystemandthebroadbandtransmissiontechnologycombinedwiththecoaxialcabledistributionnetwork,TheCATVn
