AgendaIntroductionofSFF-8431SFF-8431StandardComplianceTestofSFIEyeDiagramTestbyDSA8200AgendaIntroductionofSFF-84311IntroductionofSFF-8431

BRIEFINTRODUCTIONOF

SFF-8431ThespecificationofSFF-8431definestheelectricalinterfacesandtheirtestmethodsbetweentheSFP+moduleandhostboardforoperationupto11.1GBd.ThehighspeedelectricalinterfacebetweenthehostandSFP+moduleiscalled“SFI”.SFIsimplifiesthemoduleandleverageshostbasedtransmitpre-emphasisandhostbasedreceiveequalizationtoovercomePCBandexternalmediaimpairments.SFItypicallyoperateswithoneconnectoratthemoduleinterfaceanduptoabout200mmofimprovedFR4materialor150mmofstandardFR4.Theelectricalinterfaceisbasedonhighspeed,lowvoltageACcoupledlogicwithanominaldifferentialimpedanceof100Ω.TheSFP+specificationsincludesmanagement,lowspeedsignal,highspeedsignal,connector(definedbySFF-8083),mechanical(definedbySFF-8432),andappendicesprovidingparameterandtestboarddefinitions,andimplementationandmeasurementdescriptions.IntroductionofSFF-8431BRIE2IntroductionofSFF-8431TheSFP+SUPPORTEDSTANDARDSIntroductionofSFF-8431The3IntroductionofSFF-8431POWERSPECIFICATIONSOFSFP+

ThemodulesignalgroundcontactsVeeRandVeeTshouldbeisolatedfrommodulecase.

AthostpowerupthehostshallsupplyVccTandVccRtothemodulewithin100msofeachother.

SFP+lowspeedsignalingisbasedonLowVoltageTTL(LVTTL)operatingwithamodulesupplyof3.3V+/-5%andwithahostsupplyrangeof2.38to3.46V.Toavoidexceedingsystempowersupplylimitsandcoolingcapacity,allmodulesatpowerupbydefaultshalloperatewith≤1.0W.HostssupportingPowerLevelIIoperationmayenableaPowerLevelIImodulethroughthe2-wireinterface.PowerLevelIImodulesshallassertthepowerleveldeclarationbitofSFF-8472..Overlongspanssuchasthe40kmEthernetextendedreach(ER)longwavelengthapplications,theSFP+transceiversmayrequireadditionalpowerconsumption,especiallyatextremeoperatingconditions.?PowerLevelImodules–Upto1.0W?PowerLevelIImodules–Upto1.5WGENERALREQUIREMENTS

IntroductionofSFF-8431POWE4IntroductionofSFF-8431

Themaximumpowerlevelisallowedtoexceedtheclassifiedpowerlevelfor500msfollowinghotinsertionorpowerup,orPowerLevelIIauthorization,howeverthecurrentislimitedtovaluesgivenbythefollowingtable.POWERSPECIFICATIONSOFSFP+IntroductionofSFF-8431The5IntroductionofSFF-8431

TheSFP+moduleshallmeetESDrequirementsgiveninEN61000-4-2,criterionBtestspecificationsuchthatunitsaresubjectedto15kVairdischargesduringoperationand8kVdirectcontactdischargestothecase.IntroductionofSFF-8431The6IntroductionofSFF-8431HIGHSPEEDELECTRICALSPECIFICATIONSofSFISFIsignalingisbasedondifferentialhighspeedlowvoltagelogicwithACcouplinginthemodule.SFIwasdevelopedwiththeprimarygoaloflowpowerandlowelectromagneticinterference(EMI).Tosatisfythisrequirementthenominaldifferentialsignallevelsare~500mVp-pwithedgespeedcontroltoreduceEMI.IntroductionofSFF-8431HIGH7Notes：Fordifferentialsignaleyetest,subtractthetwodifferentialsourcesweusingtodefineamathastheaimedsignalsource.Bandwidthisdeterminedbythecapabilitiesoftheinstalledmodules;100Mb/sto12.SFF-8431StandardComplianceTestofSFIEyeDiagramTestbyDSA8200TDRmodulessuchas80E04allowyoutomeasurecabledelayswithveryhighprecision.SMARFcoaxialcablewithupto18Gbandwidthandtheinsertionlossis1.EyeDiagramTestbyDSA8200EyeDiagramTestbyDSA8200Bandwidthisdeterminedbythecapabilitiesoftheinstalledmodules;TESTENVIRONMENTREQUIREMENTSMaskSettingSFF-8431StandardComplianceTestofSFIBandwidthisdeterminedbythecapabilitiesoftheinstalledmodules;1AcquaintedwithOurInstrument6dBandthecoaxialcableis-0.ThemaximumSFItracelengthrecommendbythespecificationofSFF-8431.Minimizeskewbyusingbalancedcablepairs.EyeDiagramTestbyDSA8200DSA8200DigitalSerialAnalyzerIntroductionofSFF-8431PCBLAYOUTRECOMMENDATIONSThePCBtracesarerecommendedbythespecificationtomeet100±10Ωdifferentialimpedacewithnominal7%differentialcoupling.Itispreferabletohavetheimpedancetolerancebe±5Ω.Routedifferentialpairsatleast8xtheirtrace-widthfromothertraces.Avoidsharpanglesinrouting,chamfercorners.Inordertoavoidreflection,therecommendedminimumtracelengthrequirementis“1inch”inFR4.Whentheremustbeviasonthehigh-speeddifferentialsignals,the100differentialviasisrecommendedbeused.Andstubsduetoviasmustbeavoided.ThemaximumSFItracelengthrecommendbythespecificationofSFF-8431.Notes：Fordifferentialsignal8SFF-8431StandardComplianceTestofSFITESTENVIRONMENTREQUIREMENTSThebandwidthofmeasurementinstrumentshallbe12GHzorabove;RequireACcoupledtestequipmentonalltestports；AllSFItestequipmentmusthave50ohmsingleendedimpedance；Referenceimpedancefordifferentialmeasurementsis100ohm,andthereferenceimpedanceforcommonmodemeasurementsis25ohm;Hostcompliancetestboardisrequired.SFF-8431STANDARDCOMPLIANCETESTofSFISFF-8431StandardComplianceT92EyeDiagramTestEnvironmentSetupofSFINotes：Selectthemathwehaddefinedasthewaveformdatabaseandchoosetheinfinitemodetodisplayit.SFP+lowspeedsignalingisbasedonLowVoltageTTL(LVTTL)operatingwithamodulesupplyof3.SetaSTOPActionDCto65GHzopticalbandwidth;DCto70+GHzelectricalbandwidth,withupto12.Thepropagationdelayinherentinconnectingcablesandprobescanresultininaccurateamplitudeandtime-correlatedmeasurements.CR125AElectricalClockRecoveryinstrumentRequireACcoupledtestequipmentonalltestports；SFF-8431StandardComplianceTestofSFISettingMathassourcesPCBLAYOUTRECOMMENDATIONSEyeDiagramTestbyDSA8200IntroductionofSFF-8431Minimizeskewbyusingbalancedcablepairs.Bandwidthisdeterminedbythecapabilitiesoftheinstalledmodules;DSA8200DigitalSerialAnalyzerTESTENVIRONMENTREQUIREMENTSDSA8200DigitalSerialAnalyzerTESTMETHODOLOGYANDMEASUREMENT

HOSTCOMPLIANCETESTA.1Testpoint

HostsystemtransmitterandreceivercompliancearedefinedbytestsinwhichaHostComplianceBoardisinsertedinplaceoftheSFP+module.ThecompliancepointsareB.SFF-8431StandardComplianceTestofSFI2EyeDiagramTestEnvironmen10A.2MeasurementsetupSFF-8431StandardComplianceTestofSFIA.2MeasurementsetupSFF-8411A.2TESTEQUIPMENTSFF-8431StandardComplianceTestofSFIA.2TESTEQUIPMENTSFF-843112A.3HostTransmitterOutputJitterandEyeMaskSpecificationsatB

SFF-8431StandardComplianceTestofSFIA.3HostTransmitterOutput1310GSFP+CuDIRECTATTACHCABLEComplianceTest

10GSFP+CucableassembliesareeffectivelyconstructedoutofapairofSFP+moduleswiththeOEcomponentsreplacedwithcoppercabling.ThecableassemblyshallincorporateDCblockingcapacitorswithatleast4.3VratingontheRXsideandwithhighpasspoleofbetween20kHzand100kHz.ThedrainwireisconnectedtoVeeTandtoVeeR.ThecableshielddirectlyconnectsthemoduleAandBcases.B.110GSFP+CuDirectAttachConstructionSFF-8431StandardComplianceTestofSFI10GSFP+CuDIRECTATTACHCABLE14SFF-8431StandardComplianceTestofSFIB.2SFP+DirectAttachCableTestSetupSFF-8431StandardComplianceT15SFF-8431StandardComplianceTestofSFIB.310GSFP+CuCableAssemblySpecificationsatB’andC’SFF-8431StandardComplianceT16OurTestEnvironmentFigure1EyeDiagramTestbyDSA8200OurTestEnvironmentFigure1Ey17KeyfeaturesofTestInstrumentsDSA8200DigitalSerialAnalyzerDCto65GHzopticalbandwidth;DCto70+GHzelectricalbandwidth,withupto12.5GHztriggering.Bandwidthisdeterminedbythecapabilitiesoftheinstalledmodules;CR125AElectricalClockRecoveryinstrument100Mb/sto12.5Gb/scontinuousdataratecoverage;Single-endedordifferential50Ωdatainputs/outputs;DCcoupleddatathroughpath;Insertionloss:-2.6dBwhen12GHz80E04ElectricalSampleModule

SMARFcoaxialcablewithupto18Gbandwidthandtheinsertionlossis1.4dB/mwhen10GHz.EyeDiagramTestbyDSA8200KeyfeaturesofTestInstrume18InstallingTestEnvironmentCautionsDoNOTapplyasignaloutsidetheMaximumInputVoltageSwing;Alwaysuseawriststrapwhenmakingsignalconnections;Dischargetogroundanyelectrostaticchargethatmaybepresentonthecenterandouterconductorsofcablesbeforeattachingthecablestotheinstrument;Neverinstallorremovemoduleswhiletheinstrumentispoweredon;DoNOTtransportorshiptheinstrumentwithmodulesinstalled;Ifpossible,alwaysuseESDprotectionmodule(80E02)alongthetestpath,example,TDRtest;Alwaysdisablethe80E04’s

TDRfunctionwhennotusetheTDRfunction.EyeDiagramTestbyDSA8200InstallingTestEnvironmentEye19C.1AcquaintedwithOurInstrumentDSA8200DigitalSerialAnalyzerEyeDiagramTestbyDSA8200C.1AcquaintedwithOurInstr20EyeDiagramTestbyDSA8200EyeDiagramTestbyDSA820021SFF-8431StandardComplianceTestofSFIEyeDiagramTestbyDSA8200Toavoidexceedingsystempowersupplylimitsandcoolingcapacity,allmodulesatpowerupbydefaultshalloperatewith≤1.EyeDiagramTestbyDSA8200Step3：CalibrateourtestinstallingSFF-8431StandardComplianceTestofSFINotes：Usetheverticalbuttonstocompensatethechannelweused.SettingtriggerNotes：Pleaseseetheattachednotestosettheeyediagramtestsetup.310GSFP+CuCableAssemblySpecificationsatB’andC’Single-endedordifferential50Ωdatainputs/outputs;Notes：Usetheverticalbuttonstocompensatethechannelweused.110GSFP+CuDirectAttachConstructionDoNOTtransportorshiptheinstrumentwithmodulesinstalled;Notes：Fordifferentialsignaleyetest,subtractthetwodifferentialsourcesweusingtodefineamathastheaimedsignalsource.1AcquaintedwithOurInstrumentSMARFcoaxialcablewithupto18Gbandwidthandtheinsertionlossis1.GENERALREQUIREMENTSNeverinstallorremovemoduleswhiletheinstrumentispoweredon;ThecableassemblyshallincorporateDCblockingcapacitorswithatleast4.SFF-8431StandardComplianceTestofSFICR125AElectricalClockRecoveryinstrumentEyeDiagramTestbyDSA8200SFF-8431StandardComplianceT2280E04ElectricalSamplingModulewithTDRfunction.EyeDiagramTestbyDSA820080E04ElectricalSamplingModu23C.2EyeDiagramTestEnvironmentSetupofSFINotes：Pleaseseetheattachednotestosettheeyediagramtestsetup.Step1.Installingthehardwareenvironmentas“figure1”showing;EyeDiagramTestbyDSA8200Step2.POWERONtheinstrumentsandwait20minutesforinstrumentswarm-upperiod;C.2EyeDiagramTestEnvironm24EyeDiagramTestbyDSA8200Step3.ConfirmtheTDRfunctionisDISABLEDduringtheeyediagramtesttoavoiddamagethe80E04TDRmodule;Notes:Confirmthosecheck-boxunder“TDR”SETUPSisuncheckedtodisabletheTDRfunctionsonthetestchannel.EyeDiagramTestbyDSA8200Ste25EyeDiagramTestbyDSA8200Step4.ExecutecompensationandwaituntilthestatusofallitemswarmuptoPASS;IfthestatusisFail,rerunthecompensation.IfFailstatuscontinuesandyouhaveallowedwarmuptooccur,themoduleormaininstrumentmayneedservice.EyeDiagramTestbyDSA8200Ste26Step5.Settingsoftwareenvironment;SettingtheDisplayStyleNotes:SelecttheInfinitePersistenceonthe“Disp”andthe“fastsampling”modeonthefrontpanel.EyeDiagramTestbyDSA8200Step5.Settingsoftwareenvi27SettingtriggerNotes:SelecttheExternalPrescalerasthetriggersource.EyeDiagramTestbyDSA8200SettingtriggerEyeDiagramTes28SFF-8431StandardComplianceTestofSFIIntroductionofSFF-84311AcquaintedwithOurInstrumentSFF-8431StandardComplianceTestofSFISFF-8431StandardComplianceTestofSFIRoutedifferentialpairsatleast8xtheirtrace-widthfromothertraces.IntroductionofSFF-8431SFF-8431StandardComplianceTestofSFI6dBwhen12GHzKeyfeaturesofTestInstruments1AcquaintedwithOurInstrumentDCcoupleddatathroughpath;PCBLAYOUTRECOMMENDATIONSTDRmodulessuchas80E04allowyoutomeasurecabledelayswithveryhighprecision.Inordertoavoidreflection,therecommendedminimumtracelengthrequirementis“1inch”inFR4.5Gb/scontinuousdataratecoverage;Notes：Pleaseseetheattachednotestosettheeyediagramtestsetup.ThemaximumSFItracelengthrecommendbythespecificationofSFF-8431.5Gb/scontinuousdataratecoverage;100Mb/sto12.SettingMathassourcesEyeDiagramTestbyDSA8200Notes：Fordifferentialsignaleyetest,subtractthetwodifferentialsourcesweusingtodefineamathastheaimedsignalsource.SFF-8431StandardComplianceT29SFF-8431StandardComplianceTestofSFIEyeDiagramTestbyDSA8200DoNOTtransportorshiptheinstrumentwithmodulesinstalled;IntroductionofSFF-8431ThecableassemblyshallincorporateDCblockingcapacitorswithatleast4.SFItypicallyoperateswithoneconnectoratthemoduleinterfaceanduptoabout200mmofimprovedFR4materialor150mmofstandardFR4.1AcquaintedwithOurInstrumentEyeDiagramTestbyDSA8200CR125AElectricalClockRecoveryinstrumentWaveformDatabasesThedrainwireisconnectedtoVeeTandtoVeeR.Neverinstallorremovemoduleswhiletheinstrumentispoweredon;EyeDiagramTestbyDSA8200ThecableassemblyshallincorporateDCblockingcapacitorswithatleast4.SFP+lowspeedsignalingisbasedonLowVoltageTTL(LVTTL)operatingwithamodulesupplyof3.Thepropagationdelayinherentinconnectingcablesandprobescanresultininaccurateamplitudeandtime-correlatedmeasurements.ExecutecompensationandwaituntilthestatusofallitemswarmuptoPASS;IfthestatusisFail,rerunthecompensation.EyeDiagramTestbyDSA8200EyeDiagramTestbyDSA8200IfFailstatuscontinuesandyouhaveallowedwarmuptooccur,themoduleormaininstrumentmayneedservice.WaveformDatabasesEyeDiagramTestbyDSA8200Notes：Selectthemathwehaddefinedasthewaveformdatabaseandchoosetheinfinitemodetodisplayit.SFF-8431StandardComplianceT30MaskSettingEyeDiagramTestbyDSA8200Notes：Selectouraimedeyemaskinthedrop-downmenuorimportcustomermaskwehaddefined.MaskSettingEyeDiagramTestb31SettingMeasurementsEyeDiagramTestbyDSA8200Notes：Selectthesignalsourceandsetsignaltypeto“NRZ”.Then,

setmeasurementweaimedtoshowonthescreen,forexample,eyeheight,eyewidth,Pk-Pkjitter,RMSjitter,andsoon.SettingMeasurementsEyeDiagr32SetaSTOPActionEyeDiagramTestbyDSA8200SetaSTOPActionEyeDiagramT33RestartTestingEyeDiagramTestbyDSA8200RestartTestingEyeDiagramTes34Notes：Selectthemathwehaddefinedasthewaveformdatabaseandchoosetheinfinitemodetodisplayit.DCto65GHzopticalbandwidth;DCto70+GHzelectricalbandwidth,withupto12.Notes：Selectthesignalsourceandsetsignaltypeto“NRZ”.SFF-8431StandardComplianceTestofSFINeverinstallorremovemoduleswhiletheinstrumentispoweredon;PCBLAYOUTRECOMMENDATIONSTheSFP+SUPPORTEDSTANDARDSSFItypicallyoperateswithoneconnectoratthemoduleinterfaceanduptoabout200mmofimprovedFR4materialor150mmofstandardFR4.SFF-8431StandardComplianceTestofSFIGENERALREQUIREMENTSInstallingTestEnvironment1AcquaintedwithOurInstrument3VratingontheRXsideandwithhighpasspoleofbetween20kHzand100kHz.Insertionloss:-2.ThecompliancepointsareB.ToobtainthebestmeasurementandanalysisInordertoavoidreflection,therecommendedminimumtracelengthrequirementis“1inch”inFR4.SMARFcoaxialcablewithupto18Gbandwidthandtheinsertionlossis1.100Mb/sto12.TheSFP+specificationsincludesmanagement,lowspeedsignal,highspeedsignal,connector(definedbySFF-8083),mechanical(definedbySFF-8432),andappendicesprovidingparameterandtestboarddefinitions,andimplementationandmeasurementdescriptions.EyeDiagramTestbyDSA8200Step3：CalibrateourtestinstallingThepropagationdelayinherentinconnectingcablesandprobescanresultininaccurateamplitudeandtime-correlatedmeasurements..Toobtainthebestmeasurementandanalysisresultsfromyourinstrument,youwillneedtoremoveskewandcompensatetheattenuationsinthetestenvironment.QuickTipsMinimizeskewbyusingbalancedcablepairs.Measureandmatchyourcables.TDRmodulessuchas80E04allowyoutomeasurecabledelayswithveryhighprecision.Compensatetheattenuationsonthecablesandperipherals(CR125A).Notes：Selectthemathwehadd35EyeDiagramTestbyDSA8200De-skewCableDelayProcedureEyeDiagramTestbyDSA8200De-36EyeDiagramTestbyDSA8200EyeDiagramTestbyDSA820037EyeDiagramTestbyDSA8200EyeDiagramTestbyDSA820038EyeDiagramTestbyDSA8200EyeDiagramTestbyDSA820039EyeDiagramTestbyDSA8200Congratulations,that’salltheinstallingofourtestproceduresblow,andyoucanbeginyourtestnow!!!CompensatetheAttenuationonthesignalpathForexample,thenominalattenuationontheCR125Ais-2.6dBandthecoaxialcableis-0.7dB/m,weusedonetwo0.5mcoaxialcableeachchannel,so,weshouldcompensate4.0dB/channelonourdifferentialsignalpath.Notes：Usetheverticalbuttonstocompensatethechannelweused.EyeDiagramTestbyDSA8200Con40Q&AQ&A41Thankyou!Thankyou!4210GSFP+CuDIRECTATTACHCABLEComplianceTest

10GSFP+CucableassembliesareeffectivelyconstructedoutofapairofSFP+moduleswiththeOEcomponentsreplacedwithcoppercabling.ThecableassemblyshallincorporateDCblockingcapacitorswithatleast4.3VratingontheRXsideandwithhighpasspoleofbetween20kHzand100kHz.ThedrainwireisconnectedtoVeeTandtoVeeR.ThecableshielddirectlyconnectsthemoduleAandBcases.B.110GSFP+CuDirectAttachConstructionSFF-8431StandardComplianceTestofSFI10GSFP+CuDIRECTATTACHCABLE4310GSFP+CuDIRECTATTACHCABLEComplianceTest

10GSFP+CucableassembliesareeffectivelyconstructedoutofapairofSFP+moduleswiththeOEcomponentsreplacedwithcoppercabling.ThecableassemblyshallincorporateDCblockingcapacitorswithatleast4.3VratingontheRXsideandwithhighpasspoleofbetween20kHzand100kHz.ThedrainwireisconnectedtoVeeTandtoVeeR.ThecableshielddirectlyconnectsthemoduleAandBcases.B.110GSFP+CuDirectAttachConstructionSFF-8431StandardComplianceTestofSFI10GSFP+CuDIRECTATTACHCABLE44SFF-8431StandardComplianceTestofSFIDe-skewCableDelayProcedureIfpossible,alwaysuseESDprotectionmodule(80E02)alongthetestpath,example,TDRtest;SFIsimplifiesthemoduleandleverageshostbasedtransmitpre-emphasisandhostbasedreceiveequalizationtoovercomePCBandexternalmediaimpairments.SMARFcoaxialcablewithupto18Gbandwidthandtheinsertionlossis1.3VratingontheRXsideandwithhighpasspoleofbetween20kHzand100kHz.EyeDiagramTestbyDSA8200EyeDiagramTestbyDSA8200RequireACcoupledtestequipmentonalltestports；Notes：Selectthemathwehaddefinedasthewaveformdatabaseandchoosetheinfinitemodetodisplayit.Overlongspanssuchasthe40kmEthernetextendedreach(ER)longwavelengthapplications,theSFP+transceiversmayrequireadditionalpowerconsumption,especiallyatextremeoperatingconditions.Bandwidthisdeterminedbythecapabilitiesoftheinstalledmodules;1AcquaintedwithOurInstrumentThecableshielddirectlyconnectsthemoduleAandBcases.2TESTEQUIPMENTTheSFP+specificationsincludesmanagement,lowspeedsignal,highspeedsignal,connector(definedbySFF-8083),mechanical(definedbySFF-8432),andappendicesprovidingparameterandtestboarddefinitions,andimplementationandmeasurementdescriptions.TheSFP+SUPPORTEDSTANDARDSSFF-8431StandardComplianceTestofSFIMeasureandmatchyourcables.EyeDiagramTestbyDSA8200KeyfeaturesofTestInstrumentsDSA8200DigitalSerialAnalyzerDCto65GHzopticalbandwidth;DCto70+GHzelectricalbandwidth,withupto12.5GHztriggering.Bandwidthisdeterminedbythecapabilitiesoftheinstalledmodules;CR125AElectricalClockRecoveryinstrument100Mb/sto12.5Gb/scontinuousdataratecoverage;Single-endedordifferential50Ωdatainputs/outputs;DCcoupleddatathroughpath;Insertionloss:-2.6dBwhen12GHz80E04ElectricalSampleModule

SMARFcoaxialcablewithupto18Gbandwidthandtheinsertionlossis1.4dB/mwhen10GHz.EyeDiagramTestbyDSA8200SFF-8431StandardComplianceT45C.1AcquaintedwithOurInstrumentDSA8200DigitalSerialAnalyzerEyeDiagramTestbyDSA8200C.1AcquaintedwithOurInstr46C.1AcquaintedwithOurInstrumentDSA8200DigitalSerialAnalyzerEyeDiagramTestbyDSA8200C.1AcquaintedwithOurInstr47WaveformDatabasesEyeDiagramTestbyDSA8200Notes：Selectthemathwehaddefinedasthewaveformdatabaseandchoosetheinfinitemodetodisplayit.WaveformDatabasesEyeDiagram48SetaSTOPActionEyeDiagramTestby