HDMI测试原理

[e-mail]12/19/20122HDMIHDMISinkDevicesTVs,Monitors,Repeaters,etc.SourceDevicesSet-topBoxes,DVDs,Repeaters,GamingdevicesCableAssembliesCables12/19/20123HDMIHDMITypeA:HDMITypeBDualChannelTypeCMiniHDMITypeD:MicroHDMITypeC)TypeEHDMI12/19/20124HDMIHDMI1.312/19/20125HDMIHDMI1.412/19/20126HDMIHDMISourceSinkSourceHPD2VSourceDDC(Displaydatachannel)EDIDSinkSourceTMDS3.3V,TMDSTMDSClockTMDSTMDS.SourceSink12/19/20127HDMITMDSHDMI(TMDS)3.3V50400-600mV,500mV,800-1200mV150mV-1200mVSink.3.3V2.8V+500mV-500mVSink3.3V12/19/20128HDMITMDSDataClockTMDS10TMDS340Mpps1.65Gbps(1.2)1920*1080P/50Hz/24bit1.485Gbps3.4Gbps(1.3),1920*1080P/50Hz/48bit2.97GbpsHDMI1.42.97Gbps4096*2160/24Hz/24bit75ps1200ps()12/19/20129HDMIPixelclockTMDSclock24bitmode:TMDSclock=1.0XPixelclock(1:1)30bitmode:TMDSclock=1.25XPixelclock(5:4)36bitmode:TMDSclock=1.5XPixelclock(3:2)48bitmode:TMDSclock=2.0XPixelclock(2:1)12/19/201210HDMIPixels/Second=H-Pixels*V-Pixels*Rate*(1+%Overhead/100)H-PixelsHorizontalPixels(1920)V-PixelsVerticalPixels(1080P)RateScreenRe-flashRate(60Hz)OverheadBlanking(0.2or20%)colordepth=24bit,Clockrate=pixelclockratecolordepth24bit,Clockrate=pixelclockrate*(colordepth/24)Colordepth24,30,36,48(24,30,36,48)/2412/19/201211HDMIHDMI/4bitto10bit2bitto10bit8bitto10bit12/19/201215HDMIHarmonic1st3rd5thHDMI1.3/1.4DataRate=2.97Gbps,HDMI1.2DataRate=1.485GbpsHDMI2.97Gbps,2.97/2=1.485GHz,51.485*5=7.425GHz8GhzHDMI1.485Gbps,53.7GHz4GhzFrequencydB12/19/201216HDMIHDMISource(7-10)(7-9)(7-8)*(7-6)/(7-4)/*(7-5)(7-7)(7-2)EDIDIoff12/19/201217HDMI27MHz(or25MHz),74.25MHz,148.5MHz,and222.75MHz,Source.PLL16M12/19/201218HDMISource7-1012/19/201219HDMISource7-9TMDSClockPLL10GS/s16M()2XL0.25Tbit12/19/201220HDMISource7-812/19/201221HDMISource7-4:/12/19/201222HDMISource7-612/19/201223HDMISource7-612/19/201224HDMI-12/19/201225HDMISource7-212/19/201226HDMISource7-712/19/201227HDMIDPO12/19/201228HDMISource12/19/201229HDMIHDMIType-ATestFixtureHDMI(Sink)12/19/201231HDMI(sink)Sink(8-7)jittertolerance(8-5)Min/Maxdifferentialswingtolerance(8-6)Intra-Pairskewtoleranceimpedance(8-8)EDID,HPD12/19/201232HDMISinkSink-HDMITektronixHDMI.AWG7000BwithDirectSynthesisSignificantlyReducesTestTimePresentSolution-HDMISinkJitterTolerancesetup12/19/201233HDMIAWG7000BwithDirectSynthesisSignificantlyReducesTestTimeHDMIJitterToleranceTestwithDirectSynthesis12/19/201234HDMIHDMI12/19/201235AWG7000BwithDirectSynthesisSignificantlyReducesTestTimeTektronixHDMIDirectSynthesisSolutionType2CableEmulatorsupportusingDSalreadyapprovedandisavailableinCTS1.3creleasedonJuly25th2008.Resolution27MHzType1Cat1+Cat2Type227MHz74.25MHzType1Cat1Type275MHz148.5MHzType1Cat2Type3222.75MHzType1Cat2Type327MHzAutomotive27MHzNA74.25MHzAutomotive74MHzNAAutomotiveGeneralCableEmulatorsHDMI12/19/201236AWG7000BwithDirectSynthesisSignificantlyReducesTestTimeBenefitsofDirectSynthesisSimplicityTEKTRONIXONLYSOLUTIONPROVIDERTOSUPPORTALLCABLEEMULATORSREQUIREDforHDMISinkJitterTolerancetest.EliminationCableEmulatorsandTTC(TransitionTimeConverts)Cableemulators(7cabletypes)~40transitiontimefiltersGreatlyreducestheopportunityforoperatorerrorPerformanceGeneratesawiderangeofrise-timeswithoutdifferentfiltersSupportsboththeCombinedandtheSeparateclock/datajitterinsertionmethodsSynthesizesany/allCableEmulatorwithanyrequirementsEnablescustomerstoperformtheirownmargintestingFlexibilityThetestrepeatabilityacrossmultiplelabs/locationsPre-compensateswaveformstoproducesignalsattheDUTlaunchpointEmulatesanyimpairmenttheCTSrequiresinthefutureHDMI1.4aSpecificationreleasedonMarch4th2010underadopteragreementofHDMIstandardsbody.SalientFeatures:AutomotiveHDMI(TypeE)-addednewcableemulatorsMobileHDMI(TypeD)HEAC(HDMIEthernetAudioBackChannel)4kx2Kresolutionsupport3-DHDMIpatterns-updatedAdditionalDeepColorpatternsCTS1.4aannouncedonMarch4th2010.12/19/201252HDMITektronixHDMI1.4aTestSolutionsAutomotive12/19/201253HDMITektronixHDMI1.4aTestSolutionsEyeDiagramMaskatTP5and2.3dBEqualizer12/19/201254HDMITektronixHDMI1.4aTestSolutionsAutomotiveHDMITestingneedsComplianceSoftwareforTypeE(approvedinCTS1.4)SourcetestremainsunchangedSinkJitterToleranceTestforTypeECableEyeDiagramTestfortypeETypeEFixtureapprovedinCTS1.412/19/201255HDMITektronixHDMI1.4aTestSolutionsAutomotiveHDMISolutionfromTektronix12/19/201256HDMITektronixHDMI1.4aTestSolutionsHDMIMobileSolutionTypeDMobilecompanieswillsupportHDMInewconnectors.TypeDFixturewillberequiredandisapprovedbyHDMIstandards.12/19/201257HDMIHDMIETHERNETAUDIORETURNCHANNEL(HEAC)EndUseapplication12/19/201258HDMIHDMI1.3Architecture12/19/201259HDMIHDMI1.4Architecture12/19/201260HDMITektronixHDMI1.4aTestSolutionsWhatisHEAC?HighSpeedNetworkCapabilityProvidesbi-directionalpoint-to-pointcommunicationEnablesbuildinghighperformancehomenetwork1000timesfasterthanexistinglinksusingCECUtilizeswidelyaccepted100Base-TXEthernettechnologyDigitalAudioStreamTransferProvidesSPDIFformatdigitalaudiochannelEnablesversatilehandlingofdigitalsoundbyAVcontrolcenterQualityaudioat32k/44.1k/48ksamplingratesBackwardtransferonly(SinktoSource)CompatibilitywithCurrent