Table of Contents
1.0INTRODUCTIONANDDESCRIPTION
1.1PurposeofThisCharacteristic
1.2FunctionoftheEquipment
1.3UnitDescription
1.3.1MLSReceiverProcessorUnit
1.3.2FrequencyControl
1.3.3Antennas
1.3.4Instrumentation
1.4Interchangeability
1.4.1General
1.4.2InterchangeabilityDesiredfortheARINC727
MLSReceiverComponents
1.4.3"GenerationInterchangeability"ConsiderationsMLSReceiverComponents
1.5RegulatoryApproval
2.0INTERCHANGEABILITYSTANDARDS
2.1Introduction
2.2FormFactors,ConnectorsIndexPinCoding
2.2.1MLSReceiverProcessorUnit
2.2.2StandardControlPanel
2.2.3Indicators
2.2.4Antennas
2.3StandardInterwiring
2.4PowerCircuitry
2.4.1PrimaryPowerInput
2.4.2PowerControlCircuitry
2.4.3TheACCommonCold
2.4.4TheCommonGround
2.5StandardizedSignaling
2.5.1ARINC429DITSDataBus
2.5.2Standard"Open"
2.5.3Standard"Ground"
2.5.4Standard"AppliedVoltage"Output
2.5.5StandardDiscreteInput
2.5.6StandardDiscreteOutput
2.6EnvironmentalConditions
2.7Cooling
2.8GroundingandBonding
3.0MLSRECEIVERPROCESSORDESIGN
3.1MLSReceiverProcessor
3.1.1SignalValidity
3.1.2FrequencyRangeandChanneling
3.1.3ReceiverProcessorSensitivity
3.1.4FrequencyStability
3.1.5In-BandInterference
3.1.6Out-of-BandInterference
3.1.7TheDMEConnection
3.1.8MonitorIntegrity
3.1.9FunctionalTest
3.2DigitalDataInputs
3.2.1ChannelSelection
3.2.2CentralizedFaultDisplaySystemInput
3.2.3DMEInputs
3.3DigitalDataOutputs
3.3.1SelectedChannelandAngleReporting
3.3.2DeviationOutputs
3.3.3BasicandAuxiliaryDataOutputs
3.3.4DiscreteWordOutputs
3.3.5BITEOutputs
3.3.6IdentificationOutput
3.4AnalogOutputs
3.4.1DeviationSignalOutputCharacteristics
3.4.2AFCSOutputs
3.4.3HighLevelOutputs
3.4.4LowLevelOutputs
3.4.5DeviationOutputPolarity
3.4.6DeviationOutputSensitivity
3.4.6.1HighLevelDeviationOutputSensitivity
3.4.6.2LowLevelDeviationOutputSensitivity
3.4.7CourseStability
3.4.7.1AzimuthCourseCenteringStability
3.4.7.2GlidePathCourseCenteringStability
3.4.8CourseAccuracy
3.4.8.1PathFollowError
3.4.8.2ControlMotionNoise
3.4.8.3BiasError
3.4.8.4Resolution
3.4.9DeviationOutputLinearity
3.4.9.1AzimuthCourseDeviationOutputLinearity
3.4.9.2GlidePathCourseDeviationOutputLinearity
3.4.10DeviationOutputDamping
3.5WarningSignals
3.5.1WarningSignalCharacteristics
3.5.1.1DigitalDataWordWarnings
3.5.1.2AFCSWarningSignals
3.5.1.3HighLevelInstrumentWarningSignals
3.5.1.4LowLevelInstrumentWarningSignals
3.5.1.5GlideSlopeDeviationBarandFlagBiasing
3.5.2WarningConditions
3.5.2.1EquipmentFailure
3.5.2.2LossofInputSignal
3.5.2.3GroundStationNotAvailable
3.5.2.4InadequateReceiptorDecodingofData
3.5.2.5CommandConflicts
3.6DiscreteInputs
3.7OutputDiscretes
3.8ProgramFunctions
3.9AudioOutput
3.9.1AudioOutputPower
3.9.2AudioSourceImpedance
3.9.3AudioOutputLevelVariationwithLoadImpedance
3.9.4AudioOutputServiceAdjustment
3.10ACPowerOutputtoCDU
3.11DCPowerOutputtoPreamplifier
3.12MIL-STD-1553B
4.0CONTROLDISPLAYUNIT
4.1ControlFunctions
4.1.1Auto/Manual
4.1.2ChannelSelection
4.1.3ApproachAzimuthAngleSelect
4.1.4GlidePathAngleSelect
4.1.5BackAzimuthAngleSelect
4.1.6Self-Test
4.2DisplayFunctions
4.2.1ApproachAzimuthMagneticCourseSelected
4.2.2GlidePathAngleSelected
4.2.3BackAzimuthMagneticCourseSelected
4.2.4DisplayOptions
4.3AnnunciationandWarning
4.3.1In-TestAnnunciation
4.3.2Approach/BackAzimuth
4.3.3MLSFault
4.3.4SelectWarning
4.4PanelIllumination
5.0ANTENNAS
5.1AntennaConfigurations
5.2AntennaCharacteristics
5.3InstallationConsiderations
5.4AntennaDesign
5.5AntennaPreamplifier
5.6PowerDividerModuleCharacteristics
6.0PROVISIONSFORAUTOMATICTESTEQUIPMENT
6.1General
6.2UnitIdentification
7.0BUILT-INTESTEQUIPMENT(BITE)
7.1Built-InTestEquipment
7.2BITEDisplay
7.3FaultMonitor
7.4Self-Test
7.5MonitorMemoryOutput
8.0Definitions
ATTACHMENTS
1ConnectorPositioning
2ARINC727MLSStandardInterwiring
NotesApplicabletotheStandardInterwiring
3ConnectorInsertLayout
4MLSLabelAttributes
NotesApplicabletoMLSLabelAttributes
5MLSARINC429LabelAttributes
6TypicalAudioOutputTestProcedures
7EnvironmentalTestCategories
8MLSChannelPairing
9AntennaDesign
10MLS/ILSSensitivityGuideline
11CDUConnectorLayout
12TableofMLSWarningOutputs
NotesonTableofMLSWarningOutputs
13LetterfromFAARe:PotentialFlammability
Hazards Abstract
Describes the desired characteristics of MLS receiver processors intended for installation in all types of commercial transport aircraft. The function of the airborne MLS receiver processor is the reception and processing of the MLS azimuth signals, the elevation signals, and the data transmitted from the MLS ground stations.
