NF P98-410-1991 道路安全隔栏.钢制安全导向装置(A和B型).操作及固持性能

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【英文标准名称】:Cableddistributionsystemsfortelevisionandsoundsignals-Systemperformanceforreturnpaths
【原文标准名称】:电视和声音信号的电缆分配系统.回程线路的系统性能
【标准号】:BSEN50083-10-2002
【标准状态】:现行
【国别】:英国
【发布日期】:2002-04-18
【实施或试行日期】:2002-04-18
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:1GeneralStandardsofEN50083seriesdealwithcablenetworksfortelevisionsignals,soundsignalsandinteractiveservicesincludingequipment,systemsandinstallations-forheadend-reception,processinganddistributionoftelevisionandsoundsignalsandtheirassociateddatasignals,and-forprocessing,interfacingandtransmittingallkindsofsignalsforinteractiveservicesusingallapplicabletransmissionmedia.Allkindsofnetworkslike-CATV-networks-MATV-networksandSMATV-networks-individualreceivingnetworksandallkindsofequipment,systemsandinstallationsinstalledinsuchnetworks,arewithinthisscope.Theextentofthesestandardisationworkisfromtheantennas,specialsignalsourceinputstotheheadendorotherinterfacepointstothenetworkuptothesystemoutletortheterminalinput,wherenosystemoutletexists.Thestandardisationofanyuserterminals(i.e.tuners,receivers,decoders,multimediaterminalsetc.)aswellasofanycoaxialandopticalcablesandaccessoriesthereforisexcluded.2Specificscopeofthispart10Thisstandardisdealingwiththetransparentreturnpathofcablenetworksoperatedinthefrequencyrangebetween5MHzand65MHzorpartsthereof.Higherfrequenciesmaybeusedinfibrebasednetworks.NOTEInadditionitispossibletousethefrequencyrangefrom0MHzto5MHzforreturnpathtransmissions,e.g.forNMSorothercontrol,monitoringandsignallingpurposes.Applicationsbelow5MHzarenotcoveredbythisstandard.Anactivereturnpathcarriestypicallyonlyreturnsignals.Apassivereturnpathcanbeusedforbothreturnandforwardsignals.Thisstandardlaysdownthebasicmethodsofmeasurementforsignalstypicallyusedinthereturnpathofcablenetworksinordertoassesstheperformanceofthosesignalsandtheirperformancelimits.Allrequirementsrefertotheperformancelimitswhichshallbeobtainedbetweenthereferencepoints(Figure1)ofthereturnpathsystem.Onereferencepointisthenetworkterminationclosetothesubscriber.Itisthelastpointwhereallforwardandreturnsignalsarepresentandcarriedonthesamecable.Ifnonetworkterminationpointexists,thereferencepointisthesystemoutlet.Theotherreferencepointistheinputofthereturnsignalreceiver(ortransceiver).Atthispointthetransparentsignalpathendsandbehindthispointthesignalistreatedinanon-transparentway.Thereturnsignalreceivercanbesituatedattheheadendbutcanalsobeatthenodeofthecoaxialcelloratanyotherpointofthenetwork.Inadditiontothesystemperformancerequirementsforthetransparentreturnpath,systemperformancerecommendationswerelaiddowninthisstandarde.g.fortheoverallfrequencyallocation,fortheuseofspecificmodulationtechniquesfordifferentinteractivemultimediaservicesorfordifferentsub-bandswithinthereturnpathfrequencyrange,etc.Specificequipmentinstalledincablenetworksfortheoperationofsuchreturnpathsisstandardisedintherelevantequipmentstandards,parts3to6oftheEN50083series.Transmissionsystemsarenotwithinthescopeofthisstandard.
【中国标准分类号】:M60
【国际标准分类号】:33_060_40
【页数】:34P;A4
【正文语种】:英语


【英文标准名称】:Radio-frequencyconnectors-Part29:sectionalspecification-Miniatureradiofrequencycoaxialconnectorsmodelscrew,snap-on,push-pullorquick-lock,slide-in(rackandpanelapplications)-Characteriscticimpedance50ohms(type1,0/2,3)-50ohm
【原文标准名称】:射频连接器.第29部分:分规范.模制螺纹、插入式、推拉式或错齿式、抽屉式(齿条和板设施)小型射频同轴连接器.特性阻抗50Ω(1.0/2.3型).50Ω和70Ω设施
【标准号】:NFC93-560-29-2006
【标准状态】:现行
【国别】:法国
【发布日期】:2006-02-01
【实施或试行日期】:2006-02-05
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:同轴;同轴连接器;尺寸选定;尺寸;电插头;电气工程;电子工程;高频工程;阻抗;信息技术;检验;小型连接器;推拉式;质量评定;速卸机构;背板连接器;射频连接器;射频插头;螺纹闭塞物;分规范;插入式连接器;规范(验收)
【英文主题词】:
【摘要】:
【中国标准分类号】:L23
【国际标准分类号】:33_120_30
【页数】:30P;A4
【正文语种】:其他