ARINC 724B:1987
ARINC 724B:1987 Aircraft Communications Addressing And Reporting System (acars) Specifies the 724B version of the airborne components of ACARS, and is intended for use in conjunction with VHF radio equipment existing on the plane.
Table of Contents
1.0INTRODUCTION1.1PurposeofthisDocument
1.2AirborneSub-SystemConfiguration
1.3Interchangeability
1.4RegulatoryApproval
2.0INTERCHANGEABILITYSTANDARDS
2.1Introduction
2.2FormFactors,ConnectorsandIndexPinCoding
2.3StandardInterwiring
2.4PrimaryPowerInput
2.5SignalCharacteristics
2.6EnvironmentalConditions
2.7Cooling
2.8GroundingandBonding
2.9StandardizedSignaling
3.0SYSTEMDESIGN
3.1Introduction
4.0MANAGEMENTUNITDESIGN
4.1Decoding
4.2Synchronization
4.3UplinkPreambleProcessing
4.4UplinkBCSCheck
4.5Input/OutputInterfaces
4.6UniversalCoordinatedTime(UTC)Clock
4.7MUDiscreteInputsandOutputs
4.8DownlinkMessageFormats
4.9MessagestoWhichCRCApplies
4.10PolledMode/DemandModeChangeover
4.11DownlinkPreambleGeneration
4.12DownlinkMessageAssembly
4.13Modulation
4.14RadioTransmitterKeying
4.15RadioTransceiverTuning
4.16RemainingDownlinkTrafficDisposition
4.17DataTransferSystem
4.18CommunicationsProtocol
4.19MessageTransferFailureNotification
4.20MUInterfaceswithOn-BoardAvionics
4.21MUInterfacewithOptionalCabinTerminals
4.22DataTransferTo/FromSatelliteDataUnit(SDU)
4.23DataTransferTo/FromtheModeSTransponder
5.0PROVISIONSFORAUTOMATICTESTEQUIPMENT
5.1General
5.2UnitIdentification
5.3UseofATLASLanguage
6.0BUILT-INTESTEQUIPMENT(BITE)
6.1Built-In-TestEquipment(BITE)
6.2FaultMonitor
6.3SelfTest
6.4BITEMemoryOutput
Attachment1-1-ExampleSingleACARSAirborneSubsystem
BlockDiagram
Attachment1-2-ExampleDualACARSAirborneSubsystemBlock
Diagram
Attachment1-3-MultipleAir/GroundInstallation
Attachment2-1-AircraftCommunicationsAddressingand
ReportingSystem(ACARS)Standard
Interwiring
Attachment2-2-AircraftCommunicationsAddressingand
ReportingSystem(ACARS)NotesApplicableto
theStandardInterwiring
Attachment2-3-ConnectorInsertLayout
Attachment3-Mark2ACARSEnvironmentalTestCategories
Attachment4-FrequencyControl
Attachment5-SerialDigitalChannelSelection
Attachment6-DigitalWordFormat