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【英文标准名称】:Cableddistributionsystemsfortelevisionandsoundsignals-Headendequipment
【原文标准名称】:电视和声音信号电缆分配系统.输入设备
【标准号】:BSEN50083-5-2002
【标准状态】:作废
【国别】:英国
【发布日期】:2002-02-06
【实施或试行日期】:2002-02-06
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:电视网;电视系统;电信系统;电信;等级(质量);有线传输(电信);电波测量;通信网;电缆电视;声信号;广播网;天线;视频信号;性能;电气试验;电学测量;可视信号;接收机;电子设备及元件;通信设备
【英文主题词】:Audiosignals;Broadcastengineering;Broadcastsignals;Broadcasting;Cabledistributioncubicles;Cabledistributionsystems;Cabletelevision;Cablednetworks;Central-antennatelevision;Definition;Definitions;Distributionsystems;Electromagneticcompatibility;EMC;Intermodulation;Measurement;Measuringtechniques;Noisebandwidths;Noisemeasurements;Properties;Ratings;Soundbroadcasting;Soundtransmission;Specification(approval);Television;Televisionbroadcasting;Televisiontechnology;Terminalstations;Transmission;Transmissiontechnique;Visionsignals
【摘要】:1GeneralStandardsofEN50083seriesdealwithcablenetworksfortelevisionsignals,soundsignalsandinteractiveservicesincludingequipment,systemsandinstallations·forheadendreception,processinganddistributionoftelevisionandsoundsignalsandtheirassociateddatasignalsand·forprocessing,interfacingandtransmittingallkindsofsignalsforinteractiveservicesusingallapplicabletransmissionmedia.Allkindsofnetworkslike·CATV-networks,·MATV-networksandSMATV-networks,·Individualreceivingnetworksandallkindsofequipment,systemsandinstallationsinstalledinsuchnetworks,arewithinthisscope.Theextentofthisstandardizationworkisfromtheantennas,specialsignalsourceinputstotheheadendorotherinterfacepointstothenetworkuptothesystemoutletortheterminalinput,wherenosystemoutletexists.Thestandardizationofanyuserterminals(i.e.tuners,receivers,decoders,multimediaterminalsetc.)aswellasofanycoaxialandopticalcablesandaccessoriesthereforisexcluded.2Specificscopeofthispart5Thisstandarddefinesthecharacteristicsofequipmentusedintheheadendsofterrestrialbroadcastandsatellitereceivingsystems(withoutsatelliteoutdoorunitsandwithoutthosebroadbandamplifiersintheheadendasdescribedinEN50083-3).ThesatelliteoutdoorunitsforFSSaredescribedinstandardETS300158,forBSSinstandardETS300249.Testmethodsforbothtypes(FSSandBSS)ofsatelliteoutdoorunitsarelaiddowninETS300457.Thisstandard·coversthefrequencyrange5MHzto3000MHz;·identifiesperformancerequirementsforcertainparameters;·laysdowndatapublicationrequirementsforcertainparameters;·stipulatesmethodsofmeasurements;·introducesminimumrequirementsdefiningqualitygrades(Q-grades).Asfaraspossiblethisstandardonlydealswiththeinterfacesbetweenheadendequipmentandonlyexplainsthefunctionoftheequipmentifthisisnecessarytosupportthedescriptionoftheinterfaces.Coder,transcoder,encrypter,decrypteretc.arenotdescribedinthisstandard.Ifsuchequipmentareusedinheadends,therelevantparametersforRF,video,audioanddatainterfaceshavetobemet.Accordingtothedefinitionsinclause3theheadendsaredividedintothefollowingthreequalitygrades:Grade1:localheadend/remoteheadendGrade2:hubheadendGrade3:MATVheadend/individualreceptionheadendPracticalexperiencehasshownthesetypesmeetmostofthetechnicalrequirementsnecessaryforsupplyingaminimumsignalqualitytothesubscribers.Thisclassificationshallnotbeconsideredasarequirementbutastheinformationforusersandmanufacturersontheminimumqualitycriteriaofthematerialrequiredtoinstallnetworksofdifferentsizes.Thesystemoperatorhastoselectappropriatematerialtomeettheminimumsignalqualityatthesubscriber'soutletandtooptimisecostperformance,takingintoaccountthesizeofthenetworkandlocalcircumstances.
【中国标准分类号】:M60
【国际标准分类号】:33_060_40
【页数】:58P;A4
【正文语种】:英语