作者:标准资料网 时间:2024-05-21 00:01:33   浏览:8506   来源:标准资料网

【英文标准名称】:Cablenetworksfortelevisionsignals,soundsignalsandinteractiveservices.RFcablingfortwowayhomenetworks
【原文标准名称】:电视信号,声音信号和交互式服务用电缆网络.双向家用网络用射频(RF)电缆
【标准号】:BSEN60728-1-1-2010
【标准状态】:现行
【国别】:英国
【发布日期】:2010-07-31
【实施或试行日期】:2010-07-31
【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】:天线系统;音频信号;电缆分布系统;电缆电视;电缆电视系统;电缆分配系统;共用天线电视;同轴电缆;兼容性;定义;电气工程;交互式的;测量;测量技术;性能;性能要求;额定值;接收天线;信号传输;声音广播;电视广播;电视传输;电视信号
【英文主题词】:Antennasystems;Audiosignals;Cabledistributionsystems;Cabletelevision;Cabletelevisionsystem;Cableddistributionsystems;CATV;Coaxialcables;Compatibility;Definitions;Electricalengineering;Interactive;Measurement;Measuringtechniques;Performance;Performancerequirements;Ratings;Receptionantennae;Signaltransmission;Soundbroadcasting;Televisionbroadcasting;Televisiontransmission;Visionsignals
【摘要】:ThispartofIEC60728providestherequirementsanddescribestheimplementationguidelinesofRFcablingfortwo-wayhomenetworks;itisapplicabletoanyhomenetworkthatdistributessignalsprovidedbyCATV/MATV/SMATVcablenetworks(includingindividualreceivingsystems)havingacoaxialcableoutput.Itisalsoapplicabletohomenetworkswheresomepartofthedistributionnetworkuseswirelesslinks,forexampleinplaceofthereceivercord.ThispartofIEC60728isthereforeapplicabletoRFcablingfortwo-wayhomenetworkswithwiredcordsorwirelesslinksinsidearoomandprimarilyintendedfortelevisionandsoundsignalsoperatingbetweenabout5MHzand3000MHz.Thefrequencyrangeisextendedto6000MHzfordistributiontechniquesthatreplacewiredcordswithawirelesstwo-waycommunicationinsidearoom(orasmallnumberofadjacentrooms)thatusesthe5GHzto6GHzband.Inabuildingdividedintoapartmentblocks,thedistributionofthesignalsinsidethehomestartsfromthehomenetworkinterface(HNI)uptothesystemoutletorterminalinput.TherequirementsatthesystemoutletaregiveninIEC60728-1,Clause5andtherequirementsattheHNIaregiveninIEC60728-1,Clause7.InClause5ofthisstandardadditionalrequirementsaregiven.Thisstandarddealswithvariouspossibilitiestodistributesignalsinahomenetwork,usingcoaxialcables,balancedpaircables,fibreopticcables(glassorplastic)andalsowirelesslinksinsidearoom(orasmallnumberofadjacentrooms)toreplacewiredcords.Thisstandardgivesreferencestobasicmethodsofmeasurementoftheoperationalcharacteristicsofthehomecablenetworkinordertoassessitsperformance.Allrequirementsrefertotheperformancelimits,whichareobtainedbetweentheinput(s)atthehomenetworkinterface(HNI)andtheoutputatanysystemoutletwhenterminatedinaresistanceequaltothenominalloadimpedanceofthesystem,unlessotherwisespecified.Wheresystemoutletsarenotused,theaboveappliestotheterminalinput.Clause5definestheperformancelimitsmeasuredatsystemoutletorterminalinputforanunimpaired(ideal)testsignalappliedattheHNI.Undernormaloperatingconditionsforanyanaloguechannelandmeetingtheselimits,thecumulativeeffectoftheimpairmentofanysingleparameterattheHNIandthatduetothehomenetworkwillproducepictureandsoundsignalsnotworsethanGradefouronthefive-gradeimpairmentscalecontainedinITU-RBT.500.TheserequirementsaregiveninIEC60728-1-2.FordigitallymodulatedsignalsthequalityrequirementisaQEF(QuasiErrorFree)reception.Thisstandarddescribesthephysicallayerconnectionforhomenetworks.DescriptionofprotocolsrequiredforLayer2andhigherlayersisoutofthescopeofthisstandard.Logicalconnectionsbetweendeviceswithinthehomenetworkarethereforenotalwaysguaranteed.
【中国标准分类号】:M61
【国际标准分类号】:33_060_30;33_060_40;33_160_01
【页数】:64P.;A4
【正文语种】:英语