IEC 60728-10-2005 电视信号、声音信号和交互服务用电缆网络.第10部分:回波路径的系统性能
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【英文标准名称】:Cablenetworksfortelevisionsignals,soundsignalsandinteractiveservices-Part10:Systemperformanceofreturnpath
【原文标准名称】:电视信号、声音信号和交互服务用电缆网络.第10部分:回波路径的系统性能
【标准号】:IEC60728-10-2005
【标准状态】:现行
【国别】:国际
【发布日期】:2005-06
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC100
【标准类型】:()
【标准水平】:()
【中文主题词】:声音广播;电缆分布系统;波幅;电视接收;安全;规范(验收);测量;定义;交互;回波路径
【英文主题词】:Amplitude;Cabledistributionsystems;Definitions;Interactive;Measurement;Returnpath;Safety;Soundbroadcasting;Specification(approval);Televisionreception
【摘要】:ThispartofIEC60728dealswiththetransparentreturnpathofcablenetworksoperatedinthefrequencyrangebetween5MHzand65MHzorpartsthereof.Higherfrequenciesmaybeusedinfibrebasednetworks.NOTEInaddition,itispossibletousethefrequencyrangefrom0MHzto5MHzforreturnpathtransmissions,forexampleforNMSorothercontrol,monitoringandsignallingpurposes.Applicationsbelow5MHzarenotcoveredbythisstandard.Anactivereturnpathcarriestypicallyonlyreturnsignals.Apassivereturnpathcanbeusedforbothreturnandforwardsignals.Thisstandardlaysdownthebasicmethodsofmeasurementforsignalstypicallyusedinthereturnpathofcablenetworksinordertoassesstheperformanceofthosesignalsandtheirperformancelimits.Allrequirementsrefertotheperformancelimits,whichshallbeobtainedbetweenthereferencepoints(Figure1)ofthereturnpathsystem.Onereferencepointisthenetworkterminationclosetothesubscriber.Itisthelastpointwhereallforwardandreturnsignalsarepresentandcarriedonthesamecable.Ifnonetworkterminationpointexists,thereferencepointisthesystemoutlet.Theotherreferencepointistheinputofthereturnsignalreceiver(ortransceiver).Atthispoint,thetransparentsignalpathendsandbeyondthispoint,thesignalistreatedinanon-transparentway.Thereturnsignalreceivercanbesituatedattheheadendbutcanalsobeatthenodeofthecoaxialcelloratanyotherpointofthenetwork.Inadditiontothesystemperformancerequirementsforthetransparentreturnpath,systemperformancerecommendationswerelaiddowninthisstandard,forexamplefortheoverallfrequencyallocation,fortheuseofspecificmodulationtechniquesfordifferentinteractivemultimediaservicesorfordifferentsub-bandswithinthereturnpathfrequencyrange,etc.Specificequipmentinstalledincablenetworksfortheoperationofsuchreturnpathsisstandardisedintherelevantequipmentstandards,parts3to6oftheIEC60728series.Transmissionsystemsarenotwithinthescopeofthisstandard.
【中国标准分类号】:M11
【国际标准分类号】:33_060_40
【页数】:40P.;A4
【正文语种】:英语
【原文标准名称】:电视信号、声音信号和交互服务用电缆网络.第10部分:回波路径的系统性能
【标准号】:IEC60728-10-2005
【标准状态】:现行
【国别】:国际
【发布日期】:2005-06
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC100
【标准类型】:()
【标准水平】:()
【中文主题词】:声音广播;电缆分布系统;波幅;电视接收;安全;规范(验收);测量;定义;交互;回波路径
【英文主题词】:Amplitude;Cabledistributionsystems;Definitions;Interactive;Measurement;Returnpath;Safety;Soundbroadcasting;Specification(approval);Televisionreception
【摘要】:ThispartofIEC60728dealswiththetransparentreturnpathofcablenetworksoperatedinthefrequencyrangebetween5MHzand65MHzorpartsthereof.Higherfrequenciesmaybeusedinfibrebasednetworks.NOTEInaddition,itispossibletousethefrequencyrangefrom0MHzto5MHzforreturnpathtransmissions,forexampleforNMSorothercontrol,monitoringandsignallingpurposes.Applicationsbelow5MHzarenotcoveredbythisstandard.Anactivereturnpathcarriestypicallyonlyreturnsignals.Apassivereturnpathcanbeusedforbothreturnandforwardsignals.Thisstandardlaysdownthebasicmethodsofmeasurementforsignalstypicallyusedinthereturnpathofcablenetworksinordertoassesstheperformanceofthosesignalsandtheirperformancelimits.Allrequirementsrefertotheperformancelimits,whichshallbeobtainedbetweenthereferencepoints(Figure1)ofthereturnpathsystem.Onereferencepointisthenetworkterminationclosetothesubscriber.Itisthelastpointwhereallforwardandreturnsignalsarepresentandcarriedonthesamecable.Ifnonetworkterminationpointexists,thereferencepointisthesystemoutlet.Theotherreferencepointistheinputofthereturnsignalreceiver(ortransceiver).Atthispoint,thetransparentsignalpathendsandbeyondthispoint,thesignalistreatedinanon-transparentway.Thereturnsignalreceivercanbesituatedattheheadendbutcanalsobeatthenodeofthecoaxialcelloratanyotherpointofthenetwork.Inadditiontothesystemperformancerequirementsforthetransparentreturnpath,systemperformancerecommendationswerelaiddowninthisstandard,forexamplefortheoverallfrequencyallocation,fortheuseofspecificmodulationtechniquesfordifferentinteractivemultimediaservicesorfordifferentsub-bandswithinthereturnpathfrequencyrange,etc.Specificequipmentinstalledincablenetworksfortheoperationofsuchreturnpathsisstandardisedintherelevantequipmentstandards,parts3to6oftheIEC60728series.Transmissionsystemsarenotwithinthescopeofthisstandard.
【中国标准分类号】:M11
【国际标准分类号】:33_060_40
【页数】:40P.;A4
【正文语种】:英语
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