简介：1.IntroductionAnyoneworkinginasystemselectromagneticcompat-ibilityenvironmentisusuallypainfullyawareofthefactthat,often,theweakestlinkinthesystemisthecabling.Whetherthisisthecableortheconnectorsthemselves,ormorelikelytheinterfacebetweenthecableandtheconnectorswheretheremaybeapoorconnectionofthecablescreen,theabilityofcablingtoleakorabsorbspurioussignalsisacauseofmuchEMCfrustration.ThissectionwilladdressthebasisofthecablingrelatedEMIphenomenonandthebestcablingpractice.
简介：1.IntroductionTheEMCdesignforthePrintedCircuitBoardhasbeenapopulartopic.Guidelinesandtipsforhigh-speedPCBdesignscouldbefoundfromnumerousresources.WheninvestigatingEMIissuesassociatedwithcircuitboards,manydetailssuchasclockfrequencies,switchingrates,rise/falltimes,signalharmonics,datatransferrates,impedances,traceloading,andtypesandvaluesofthevariouscircuitcomponents,shouldbetakenintoconsiderations.ThephysicallayoutofthePCboardanditsassociatedmetalliccomponentsareimportantconsiderations.Specialattentionshouldbegiventotheplacementandcharacteristicsofsignalsourcecomponents,vias,
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