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RTCA DO 181:2011

RTCA DO 181:2011 Minimum Operational Performance Standards For Air Traffic Control Radar Beacon System/Mode Select (Atcrbs/Mode S) Airborne Equipment Defines standards for Mode S airborne equipment (Mode S implies a combined ATCRBS/Mode S capability).

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Table of Contents

Foreword
1.0Purposeandscope
1.1Introduction
1.2Systemoverview
1.2.1ThefunctionofmodeS
1.2.2Majoroperatingcharacteristics
1.2.3Systemperformance
1.2.4Basicsystemprotocol
1.2.5ModeSmessagecontent
1.3Operationalgoals
1.4Operationalapplications
1.4.1TheATCRBSenvironment
1.4.2ThemodeSenvironment
1.4.3ModeStranspondercapabilitylevels
1.4.4UseofthemodeSdatalink
1.4.5Airborneequipment
1.5Assumptions
1.6Testprocedures
1.6.1Environmentaltests
1.6.2Detailedtestprocedures
1.6.3Installedsystemtests
1.7Definitionsofterms
2.0ModeStransponderequipmentperformance
requirementsandtestprocedures
2.1Generalrequirementsforallequipment
2.1.1Airworthiness
2.1.2Generalperformance
2.1.3Federalcommunicationscommissionrules
2.1.4Fireprotection
2.1.5Operationofcontrols
2.1.6Accessibilityofcontrols
2.1.7Flightcrewcontrolfunctions
2.1.8Optionalcrewcontrolfunctions
2.1.9Effectsoftests
2.1.10Equipmentconfiguration
2.1.11Interrogationsignals
2.2Minimumperformancestandards-standard
conditionsandsignals
2.2.1Definitionofstandardconditions
2.2.2Receivercharacteristics
2.2.3Transmittercharacteristics
2.2.4Replypulsecharacteristics
2.2.5Sidelobesuppressioncharacteristics
2.2.6Pulsedecodercharacteristics
2.2.7Desensitizationandrecoverycharacteristics
2.2.8Responseinthepresenceofinterference
2.2.9Undesiredreplies
2.2.10Selftestandmonitor(s)
2.2.11Responsetomutualsuppressionpulses
2.2.12Diversityoperations
2.2.13Datahandlingandinterfaces
2.2.14DescriptionofthemodeSsignalformat
2.2.15ModeStransponders
2.2.16Thebasictransponder
2.2.17Datalinktransponderdescription
2.2.18Antenna
2.2.19Powerinterruption
2.2.20TCAS-compatiblemodeStransponder
2.3Equipmentperformance-environmentalconditions
2.3.1Environmentaltestconditions
2.3.2Detailedenvironmentaltestprocedures
2.4Equipmenttestprocedures
2.4.1Definitionsoftermsandconditionsoftest
2.4.2Detailedtestprocedures
2.5Testproceduresforthesurveillanceand
communicationsprotocols
2.5.1Introduction
2.5.2Requiredtestequipment
2.5.3Selectionanduseofthetestprocedures
2.5.4Testprocedures
3.0Installedequipmentperformance
3.1Equipmentinstallation
3.1.1Equipmentaccessibility
3.1.2Inadvertentturnoff
3.1.3Displays
3.1.4Aircraftpowersource
3.1.5Transmissionline(s)
3.1.6Antennalocation
3.1.7Mutualsuppression
3.2Conditionsoftest
3.2.1Powerinput
3.2.2Interferenceeffects
3.2.3Environment
3.2.4Adjustmentofequipment
3.2.5Warm-upperiod
3.2.6Radiationpattern
3.3Testproceduresforinstalledequipment
performance
3.3.1Conformityinspection
3.3.2Benchtests
3.3.3Replyfrequency
3.3.4Framingpulsespacing
3.3.5Replycodes
3.3.6Pressurealtitudetransmissions
3.3.7Altitudereportingtest
3.3.8Replypulsewidth
3.3.9Receiversensitivity
3.3.10Transmitterpoweroutput
3.3.11Receivedreply
3.3.12Airspeedfixedfield
3.3.13On-the-groundcondition
3.3.14Diversityantennainstallations
3.4Flighttestprocedures
Membership
Tables
2.3.1.1Environmentaltestgroups
2.3.1.2Performancetestrequirementsduring
environmentaltests
Figures
2.1GeneralpulsepatternsforPAMinterrogations
2.2GeneralpulsepatternsforDPSKinterrogations
2.3ModeSreplywaveform
2.4OverviewofmodeSinterrogationformats
2.5OverviewofmodeSreplyformats
2.6Fieldindex
2.7Thebasictransponder:uplinkformats
2.8Thebasictransponder:downlinkformats
2.9Functionaldiagramofuplinkcoding
2.10Functionaldiagramofdownlinkcoding
2.11Thebasictransponder:interrogationacceptance
2.12Alltransponders:lockoutinitiation
2.13Alltransponders:FSandVSprotocol
2.14Alltransponders:replycontent
2.15Alldatalinktransponders:formats
2.16Alldatalinktransponders:interrogation
acceptance
2.17Alldatalinktransponders:interrogation
coordination
2.18Alldatalinktransponders:UMprotocol
2.19Alldatalinktransponders:Bprotocol
2.20Comm-Creservationandcloseout
2.21Comm-Cmessagehandling
2.22Comm-Dreservationandcloseout
2.23Comm-Dmessagehandling
2.24through2.32Testsetups

Abstract

Defines standards for Mode S airborne equipment (Mode S implies a combined ATCRBS/Mode S capability).

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