【英文标准名称】:Methodsofmeasurementforequipmentusedindigitalmicrowaveradiotransmissionsystems-Part2:Measurementsonterrestrialradio-relaysystems-Section9:Servicechannels
【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2部分:地面无线电中继系统的测量第9节:业务信道
【标准号】:IEC60835-2-9-1995
【标准状态】:现行
【国别】:国际
【发布日期】:1995-11
【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】:无线电信道;微波链路;传输性能;服务终端设备;测量技术;无线电工程;地面站
【英文主题词】:Analogue;Channels;Communicationsystems;Definitions;Digital;Digitalengineering;Digitalsignals;Earthstations;Electricalengineering;Interfacesofelectricalconnections;Measurement;Measuringtechniques;Microwavelinks;Radiochannels;Radiocircuits;Radioengineering;Radioequipment;Radiolinks;Radio-relaysystems;Serviceterminalequipment;Services;Signals;Telecommunication;Terrestrial;Transmission;Transmissionperformance;Transmissionsystems
【摘要】:Dealswithmeasurementspertainingtotheservicechannelsusedindigitalmicrowaveradio-relaysystems.Describestwobasicmethods,whicharecommonlyusedforthetransmissionofservicechannelsignals(thatisvoice,supervisoryandcontrolsignals
【中国标准分类号】:M35;M34
【国际标准分类号】:33_060_30
【页数】:35P.;A4
【正文语种】:英语


【英文标准名称】:Fibreopticcommunicationsubsystembasictestprocedures-Testproceduresforgeneralcommunicationsubsystems-Collectionandreductionoftwo-dimensionalnearfielddataformultimodefibrelasertransmitters
【原文标准名称】:光纤通信子系统基本试验程序.一般通信子系统的试验程序.多模纤维激光发射机用二维近场数据的采集和整理
【标准号】:BSEN61280-1-4-2003
【标准状态】:作废
【国别】:英国
【发布日期】:2003-05-13
【实施或试行日期】:2003-05-13
【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】:发射机;降低;二维;电信;光学;光波导;电气工程;光纤;测量;试验;通信系统;规程;多模纤维;测量装置;发射机输出;获得;纤维;近场;数据
【英文主题词】:Acquisition;Communicationsystems;Data;Dataacquisition;Documentations;Electricalengineering;Fibreoptics;Fibres;Laserengineering;Laserequipment;Lasers;Mathematicalcalculations;Measurement;Measuringdevices;Measuringtechniques;Methods;Multilingual;Multimodefibres;Nearfield;Nearfieldmeasuringvalue;Opticalwaveguides;Optics;Procedures;Ratings;Reducing;Telecommunications;Testing;Transmitteroutput;Transmitters;Two-dimensional
【摘要】:ThispartofIEC61280setsforthastandardprocedureforthecollectionoftwo-dimensionalfibreopticnearfieldgrayscaledataandsubsequentreductiontoone-dimensionaldataexpressedasasetofthreesampledparametricfunctionsofradiusfromthefibre'sopticalcenter.Theobjectofthisstandardistoreducemeasurementerrorsandinter-laboratoryvariation,supportingaccuratemathematicalpredictionofminimumguaranteedlinklengthingigabitandtengigabitfibreopticdatacommunicationssystems.Theseradialfunctionsareintendedtocharacterizefibreopticlasersourcesforuseinmathematicalmodelspredictingtheminimumguaranteedlengthofacommunicationslink.Althoughavailableasabyproduct,estimationofthenearfielddiameterisnotanobjective.
【中国标准分类号】:M33
【国际标准分类号】:33_180_01
【页数】:24P;A4
【正文语种】:英语