Data Sheet

USBProtocolSuiteUserManual 597
USB3.1ElectricalTestModes TeledyneLeCroyCorporation
 NumberofTransmittedErrors
 NumberofReceivedErrors
 StatusofLoopbackMode
Note:TheVoyagerLoopbackModedoesnotalterthetransmittedsignalanddoesnotperformthe
jittertoleranceelectricaltestdefinedinUSB‐IFElectricalLayerComplianceSpecification.
Specializedequipment,suchasTeledyneLeCroy'sPERTReceiverToleranceTestsystem,should
beusedtointroducejitterasdefinedbytheElectricalLayerComplianceSpecification.
12.14.2 Compliance Mode
TheVoyagerUSB3.1ElectricalTestwindowsupportsentrytothePolling.Compliance
substate.Thisinitiatesthetransmissionofthepseudo‐randomdatapatterngeneratedby
thescrambledD10.0compliancesequence.TheVoyagersystemUSB3.1ElectricalTest
windowcaninitiatetherequiredtestmodes,whileanattachedoscilloscopeisusedto
measurethetransmittedcompliancepatterns.
AftertheDUTisintheCompliancestateandissendingacompliancepattern(CP0),the
patternwillbetransmittedcontinuouslyuntilapingLFPSisdetectedattheDUTreceiver.
TheVoyagersystemdoesnotsendacompliancepatternbutremainsinelectricalidle
whiletheCompliancemodeisoperational.TheVoyagercantransmitsubsequent
ping.lfpssignalsinteractivelytoadvancetheDUTtothenextcompliancepattern.
Note:TheVoyagerandAdvisorT3havetheabilitytocaptureparticularCompliancePatternswhich
haveframingformatssimilartopackets.ThisincludesonlyCP3.Theotherpatternsare
bitstreamswhichtheanalyzerisunabletolockon,sotheywouldappearasIPS(InterPacket
Symbols)whichareun‐decodable.
Compliance Mode test procedure
1. ConnecttheDUTorHUTtoatestfixtureboard(forexample,anIntelboard),sothat
transmitsignalsgototheoscilloscopeandreceivesignalscomefromtheanalyzer.