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IEC/TR 61282-5-2002 光纤通信系统的设计指南.第5部分:传播体系的适应性和报酬

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【英文标准名称】:Fibreopticcommunicationsystemdesignguides-Part5:Accommodationandcompensationofdispersion
【原文标准名称】:光纤通信系统的设计指南.第5部分:传播体系的适应性和报酬
【标准号】:IEC/TR61282-5-2002
【标准状态】:现行
【国别】:国际
【发布日期】:2002-04
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/SC86C
【标准类型】:()
【标准水平】:()
【中文主题词】:纤维光学;光纤;光波导;设计;颜色的扩散;电信;模拟信号;数字信号;分散
【英文主题词】:Analoguesignals;Chromaticdispersion;Design;Digitalsignals;Dispersion;Fibreoptics;Opticalwaveguides;Telecommunications
【摘要】:ThispartofIEC61282,whichisatechnicalreport,appliestotheaccommodationandcompensationofdispersioninfibreopticcommunicationsystems.Generally,dispersioncompensationandaccommodationisusedinthe1550nmregionwithcablesincorporatingconventional(dispersion-unshifted)single-modecategoryB1fibreasshowninIEC60793-1andIEC60793-2.Inthiswavelengthregion,thefibrehasapositivedispersioncoefficientthataveragesatabout17ps/nm-km.Therearetwosubcategoriesofsuchfibre.ThecutoffwavelengthofB1fibreislowenoughforthefibretobeusedineitherthe1310nmorthe1550nmregion.Suchfibremakesupthevastmajorityofinstalledfibreopticcableworldwide.ThecutoffwavelengthofB1.2fibreishighenoughforthefibretobeusedinthe1550nmregiononly.Suchfibreisusedinsomesubmarinesystems.Smallervaluesofdispersionareattainablewithdispersion-shiftedcategoryB2fibreandwithnon-zero-dispersioncategoryB4fibre.Dispersionaccommodationorcompensationmaysometimesbeusedwiththesefibretypesaswell,butonlycategoryB1fibreswillbediscussedinthistechnicalreport.Compensationreferstotechniquesorcomponentsthatreducethevalueofthedispersionorthedispersionslopeofafibreopticlinktoenabletransmissionatdigitalbit-ratesandatanaloguefrequencieshigherthanwouldbepossiblewithoutthesetechniques.Effectively,thecumulativezero-dispersionwavelengthoftheopticalpathismovedfromthe1310nmregiontosomewhereinthe1550nmregion.Alinkofdispersion-unshiftedB1fibreandanin-linedispersioncompensatorcanbemadetoresemble,insomecumulativerespects,alinkofdispersion-shiftedB2fibre.Examplesofpassivedispersioncompensatingcomponentsincludedispersion-compensatingfibre,fibreBragggratings,andetalons.Accommodationreferstotechniquesorcomponentsthatutilizedispersiontoenabletransmissionatdigitalbit-ratesandatanaloguefrequencieshigherthanwouldbepossiblewithoutthesetechniques.Examplesofactivedispersionaccommodationincludeopticalorelectricalprechirpingatthetransmitter,dispersion-assistedtransmission,midspanspectralinversion,andreceiversignalprocessing.Accommodationwillbetreatedinfuturerevisionsofthistechnicalreport.Managementreferringtotechniquesthatvarythedispersioncoefficientalongtheopticalpath(bothsignandmagnitude)remainsunderstudy.
【中国标准分类号】:M33
【国际标准分类号】:33_180_01
【页数】:39P.;A4
【正文语种】:英语


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【英文标准名称】:StandardTestMethodforTack-FreeTimeofCaulkingCompoundsandSealants
【原文标准名称】:填缝混合料及密封料消粘时间的标准试验方法
【标准号】:ASTMD2377-2000
【标准状态】:现行
【国别】:美国
【发布日期】:2000
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:Q24
【国际标准分类号】:91_100_50
【页数】:2P;A4
【正文语种】:英语


【英文标准名称】:Non-broadcastvideotaperecorders-Methodsofmeasurement-Part2:VideocharacteristicschrominanceSECAM(IEC61041-2:1994);GermanversionEN61041-2:1996
【原文标准名称】:非广播用录像机.测量方法.第2部分:SECAM录像机色度特性
【标准号】:EN61041-2-1996
【标准状态】:现行
【国别】:
【发布日期】:1996-11
【实施或试行日期】:
【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】:试验磁带;测量技术;录像系统;磁带记录;测量;试验条件;视频;磁带录像机;记录工程;磁带;记录系统;色度;试验准备工作;视频记录;电气工程;录像带;特性
【英文主题词】:Chrominance;Colour;Cross-talk;Electricalengineering;Frequencymodulation;Luminance;Magnetictaperecordings;Magnetictapes;Measurement;Measuringtechniques;Properties;Ratings;Recordingengineering;Recordingequipment;Recordingsystem;SECAM;Testtapes;Testingconditions;Testingset-ups;Video;Videoengineering;Videorecording;Videorecordingsystems;Videotaperecorders;Videotapes
【摘要】:
【中国标准分类号】:M71
【国际标准分类号】:33_160_40
【页数】:11P.;A4
【正文语种】:英语