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Thedatabussesinaircraftandspacecraftrequireveryhighqualityintransmissionandreceptionsincepropercommunicationofcommandsanddataarecrucialtooperation.TheARINC429standardusedpredominatelyincommercialaircraftandtheMIL-STD-1553bususedinmilitaryavionicsandspacevehicles(militaryandcommercial)havesomecommoncharacteristicsaswellasimportantdifferences.Thispaperwillgiveusefulexamplesofhowtoview,testandtroubleshootthesebussesusingdigitaloscilloscopes.Testing&DebuggingAvionicsSystemsthatTECHNICALBRIEFUseARINC429orMIL-STD-1553DataBussesDr.MichaelLauterbachPhysicalCharacteristicsJanuary11,2012Aswithmanyserialdatasystems,bothARINC429andMIL-STD-1553aredifferentialbusses.ARINC429isthesimplerandlesscostlyoftheSummarytwo.Thephysicalconnectionisviatwistedpairwireswithbalanceddifferentialsignals.Itusesaselfclocking,selfsynchronizingdatabus.ThedatabussesinaircraftMIL-STD-1553usesdualredundantbalanceddifferentialpairs.Thepeakandspace……