【英文标准名称】:Methodsofmeasurementforequipmentusedindigitalmicrowaveradiotransmissionsystems;part3:measurementsonsatelliteearthstations;section4:lownoiseamplifier
【原文标准名称】:数字微波无线电传输系统使用设备的测量方法第3部分:卫星地面站的测量第4节:低噪声放大器
【标准号】:IEC60835-3-4-1993
【标准状态】:现行
【国别】:国际
【发布日期】:1993-04
【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/TC102
【标准类型】:()
【标准水平】:()
【中文主题词】:测量;地面站;无线电工程;微波链路;放大器;卫星通信;测量技术;电气工程;低噪声
【英文主题词】:Amplifiers;Communicationtechnology;Digital;Digitalengineering;Earthstations;Electricalengineering;Inspection;Inspectionspecification;Low-noise;Measurement;Measuringtechniques;Microwavelinks;Microwaves;Radiocircuits;Radioengineering;Radiocommunication;Radio-relaysystems;Radiotelegraphy;Ratings;Satellitecommunications;Satellitelinks;Signaltransmission;Specification(approval);Technology;Telecommunication;Telecommunicationlinks;Telecommunicationsystems;Transmissionsystems
【摘要】:Themethodsofmeasurementspecifiedareconcernedwith:noisetemperature,gainandgainstability,amplitudeandgroupdelay/frequencycharacteristics,input/outputlevelcharacteristics,inputandoutputreturnloss,effectofout-of-bandsignalsupon
【中国标准分类号】:M30;M34
【国际标准分类号】:33_060_30
【页数】:13P.;A4
【正文语种】:英语


【英文标准名称】:Fibreorganisersandclosurestobeusedinopticalfibrecommunicationsystems-Productspecifications-SealedpanfibrespliceclosuresType1,forcategoryS&A
【原文标准名称】:用于光纤传递系统的纤维形成体和闭路.产品规范.S&A类1型密封平盖纤维接缝闭路
【标准号】:BSEN50411-2-2-2007
【标准状态】:作废
【国别】:英国
【发布日期】:2007-05-31
【实施或试行日期】:2007-05-31
【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】:电缆;类别;分类;密度;设计;尺寸规格;电气工程;外壳;纤维光学;玻璃纤维;寿命;材料;单模纤维;光学特性;光波导;光电子学;工作性能;性能要求;产品规范;产品标准;可靠度;密封件;分规范;形状;规范(验收);接缝盒;接缝配件;测试;密封性
【英文主题词】:Cables;Categories;Classification;Density;Design;Dimensions;Electricalengineering;Enclosures;Fibreoptics;Glassfibres;Life(durability);Materials;Monomodefibres;Opticalproperties;Opticalwaveguides;Optoelectronics;Performanceinservice;Performancerequirements;Productspecifications;Productstandards;Reliability;Seals;Sectionalspecification;Shape;Specification(approval);Splicecassettes;Splicedfittings;Testing;Tightness
【摘要】:ProductdefinitionThisspecificationcontainstheinitial,startoflifedimensional,optical,mechanicalandenvironmentalperformancerequirementsofafullyinstalledspliceclosureinorderforittobecategorisedasanENstandardproduct.OperatingenvironmentThetestsselected,combinedwiththeseverityandduration,arerepresentativeofanoutsideplantforsubterraneanand/oraerialenvironmentsdefinedby:ETS300019class8.1:undergroundlocations(withoutearthquakerequirement)IEC61753-1categoryS:subterraneanenvironmentcategoryA:aerialenvironmentReliabilityWhilsttheanticipatedservicelifeexpectancyoftheproductinthisenvironmentis20years,compliancewiththisspecificationdoesnotguaranteethereliabilityoftheproduct.Thisshouldbepredictedusingarecognisedreliabilityassessmentprogramme.QualityassuranceCompliancewiththisspecificationdoesnotguaranteethemanufacturingconsistencyoftheproduct.Thisshouldbemaintainedusingarecognisedqualityassuranceprogramme.AllowedfibreandcabletypesAlthoughtheperformancetestsarecarriedoutontestsampleswithdispersionunshiftedfibre(seeAnnexA),theclosure,oncetestedaccordingtothisproductspecification,willbealsosuitedforotherfibretypeslikedispersionshifted,non-zerodispersionshiftedandmulti-modefibresThisclosurestandardallowsbothsinglemodeandmultimodefibretobeusedandcoversallIECstandardopticalfibrecableswiththeirvariousfibrecapacities,typesanddesigns.Thisincludes,butisnotlimitedto,opticalfibrecablestandardsIEC60794-2(indoor),IEC60794-3(outdoor).
【中国标准分类号】:M33
【国际标准分类号】:33_180_20
【页数】:38P.;A4
【正文语种】:英语