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EMCTerminologyEMC专业术语BASICCONCEPTS基本概念Electromagneticenvironment:Thetotalityofelectromagneticphenomenaexistingatagivenlocation.电磁环境：存在于给定场所的电磁现象的总和。Radioenvironment:Theelectromagneticenvironmentintheradiofrequencyrange.Thetotalityofelectromagneticfieldscreatedatagivenlocationbyoperation,ofradiotransmitters.无线电环境：无线电频率范围内的电磁环境。在给定场所内处于工作状态的无线电发射机产生的电磁场总和。Electromagneticnoise:Atime-varyingelectromagneticphenomenonapparentlynotconveyinginformationandwhichmaybesuperimposedorcombinedwithawantedsignal.电磁噪声：一种明显不传送信息的时变电磁现象，它可能与有用的信号叠加或组合。Natural(atmospheric)noise:Electromagneticnoisehavingitssourceinnatural(atmospheric)phenomenaandnotgeneratedbyman-madedevices.自然（天电）噪声：来源于自然（天电）现象而非人工装置产生的电磁噪声。Man-made(equipment)noise:Electromagneticnoisehavingitssourceintheman-madedevices人为（设备）噪声：来源于人工装置的电磁噪声。Radiofrequencynoise:Electromagneticnoisehavingcomponentsintheradiofre-quencyrange.无线电频率噪声：具有无线电频率分量的电磁噪声。Electromagneticradionoise:Thetotalelectromagneticdisturbancecomplexinwhichanequipment,subststem,orsystemmaybeimmersedexclusiveofitsownelectromagneticcontribution.环境无线电噪声：可浸没任一设备、子系统或系统的全部电磁骚扰的合成，其中不包含Narrowbandradionoise:Radionoisehavingaspectrumexhibitingoneormoresharppeaks,narrowinwidthcomparedtothenominalbandwidthof,andfarenoughaparttoberesolvedby,themeasuringinstruments(orthecommunicationreceivertobeprotected).窄带无线电噪声：频谱显示有一个或多个尖峰且宽度比标称带宽窄的无线电噪声其标称带宽离测量仪器（或已防护的通信接收机）可分辨的带宽足够远。Narrowbandradionoise:Radionoisehavingaspectrumbroadinwidthascomparedtothenominalbandwidthofthemeasuringinstrument,andwhosespectralcomponentsaresufficientlyclosetogetheranduniformthatthemeasuringinstrumentcannotresolvethem.宽带无线电噪声：频谱宽度比测量仪器标称带宽宽的无线电噪声，其谱分量之间相距足够近而且均匀，以致测量仪器不能分辨它们。Electromagneticradiation:Thephenomenonbywhichenergyintheformofelectro-magneticwavesemanatesfromasourceintospace.Energytransferredthroughspaceintheformofelectromagneticwaves.(Byextension,thetermradiationsometimesalsocoversinductionphenomena.)电磁辐射：能量以电磁波的形式由源发射到空间的现象。能量以电磁波形式在空间传播。（电磁辐射一词的含义有时也可引申，将电磁感应现象也包括在内。）Electromagneticdisturbance:Anyelectromagneticphenomenonthatmaydegradetheperformanceofadevice,equipment,orsystem,oradverselyaffectlivingorinertmatter.(Anelectromagneticdisturbancemaybeelectromagneticnoise,anunwantedsignal,orachangeinthepropagationmediumitself.)电磁骚扰：任何可能引起装置、设备或系统性能降低或者对有生命或无生命物质产生损坏作用的电磁现象。Radiofrequencydisturbance:Anelectromagneticdisturbancehavingcomponentsintheradiofrequencyrange.无线电频率骚扰：具有无线电频率分量的电磁骚扰。Unwantedsignal:undesiredsignal:Asignalthatmayimpairthereceptionofawantedsignal.无用信号：可能损害有用信号接收的信号。Interferingsignal:Asignalthatimpairsthereceptionofawantedsignal.干扰信号：损害有用信号接收的信号。Degradation(ofperformance):Anundesireddepartureintheoperationalperformanceofanydevice,equipment,orsystemfromitsintendedperformance.(Thetermdegradationcanapplytotemporaryorpermanentfailure.)（性能）降低：装置、设备...