DIN IEC 60068 T.2-28-1991 电器技术.基本环境试验规程.湿热试验导则

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【英文标准名称】:Cablenetworksfortelevisionsignals,soundsignalsandinteractiveservices-Part3:Activewidebandequipmentforcoaxialcablenetworks
【原文标准名称】:电视信号、声音信号和交互式设备用电缆网络.第3部分:同轴电缆网的有源带宽设备
【标准号】:BSEN60728-3-2006
【标准状态】:作废
【国别】:英国
【发布日期】:2002-07-03
【实施或试行日期】:2002-07-03
【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】:放大器;音频信号;宽带网络;宽带系统;电缆分布系统;电缆系统;电缆电视;电缆电视网络;电缆网络;公共天线电视;同轴电缆;组件;数据记录;定义;电气工程;全波电路;测量技术;计量学;标准化组件;性能;单独连接件;声音广播;规范;规范(验收);电视广播;宽带放大器
【英文主题词】:Amplifiers;Audiosignals;Broadbandnetwork;Broadbandsystems;Cabledistributionsystems;Cablesystems;Cabletelevision;Cabletelevisionsystem;Cablednetworks;Central-antennatelevision;Coaxialcables;Components;Datarecording;Definition;Definitions;Electricalengineering;Full-wavecircuitry;Measuringtechniques;Metrology;Modularunits;Performance;Single-wayconnections;Soundbroadcasting;Specification;Specification(approval);Televisionbroadcasting;Widebandamplifiers
【摘要】:GeneralStandardsofEN50083seriesdealwithcablenetworksfortelevisionsignals,soundsignalsandinteractiveservicesincludingequipment,systemsandinstallationsforheadendreception,processinganddistributionoftelevisionandsoundsignalsandtheirassociateddatasignalsandforprocessing,interfacingandtransmittingallkindsofsignalsforinteractiveservicesusingallapplicabletransmissionmedia.AllkindsofnetworkslikeCATV-networks,MATV-networksandSMATV-networks,Individualreceivingnetworksandallkindsofequipment,systemsandinstallationsinstalledinsuchnetworks,arewithinthisscope.Theextentofthisstandardisationworkisfromtheantennas,specialsignalsourceinputstotheheadendorotherinterfacepointstothenetworkuptothesystemoutletortheterminalinput,wherenosystemoutletexists.Thestandardisationofanyuserterminals(i.e.tuners,receivers,decoders,multimediaterminalsetc.)aswellasofanycoaxialandopticalcablesandaccessoriesthereforisexcluded.Specificscopeofthispart3Thisstandardappliestoallbroadbandamplifiersusedincablenetworks;coversthefrequencyrange5MHzto3000MHz;appliestoone-wayandtwo-wayequipment;laysdownthebasicmethodsofmeasurementoftheoperationalcharacteristicsoftheactiveequipmentinordertoassesstheperformanceofthisequipment;identifiestheperformancespecificationsthatshallbepublishedbythemanufacturers;statestheminimumperformancerequirementsofcertainparameters.Amplifiersaredividedintothefollowingtwoqualitylevels:Grade1:Amplifierstypicallyintendedtobecascaded.Grade2:Amplifiersforusetypicallywithinanapartmentblock,orwithinasingleresidence,tofeedafewoutlets.Practicalexperiencehasshownthesetypesmeetmostofthetechnicalrequirementsnecessaryforsupplyingaminimumsignalqualitytothesubscribers.Thisclassificationshallnotbeconsideredasarequirementbutastheinformationforusersandmanufacturersontheminimumqualitycriteriaofthematerialrequiredtoinstallnetworksofdifferentsizes.Thesystemoperatorhastoselectappropriatematerialtomeettheminimumsignalqualityatthesubscriber′soutlet,andtooptimisecost/performance,takingintoaccountthesizeofthenetworkandlocalcircumstances.Allrequirementsandpublisheddataareunderstoodasguaranteedvalueswithinthespecifiedfrequencyrangeandinwellmatchedconditions.
【中国标准分类号】:M62
【国际标准分类号】:33_060_40
【页数】:56P.;A4
【正文语种】:英语


【英文标准名称】:Manuallyoperatedballvalvesandclosedbottomtaperplugvalvesforgasinstallationsforbuildings;GermanversionEN331:1998
【原文标准名称】:建筑物燃气设备上的手动球阀和底部关闭锥形塞阀
【标准号】:EN331-1998
【标准状态】:现行
【国别】:
【发布日期】:1999-04
【实施或试行日期】:1999-04-01
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:燃气技术;家用(安装)设备;效率;球阀;阀门;气阀;定义;燃气动力装置;手控系统;手动的;截止阀;锥形旋塞阀;燃气设备
【英文主题词】:Ballvalves;Conicalcocks;Definition;Definitions;Efficiency;Gasinstallations;Gastechnology;Gasvalves;Gas-powereddevices;Handoperated;Houseinstallations;Manualcontrolsystems;Shut-offvalves;Stopvalves;Valves
【摘要】:
【中国标准分类号】:Q82
【国际标准分类号】:23_060_20
【页数】:17P.;A4
【正文语种】:英语