Table of Contents
PARTISELECTIVECALLINGSYSTEMSPECIFICATIONS
1.0GENERALDESCRIPTION
1.1Function
1.2Components
1.3ApplicationofFunction
2.0SELECTIVECALLINGTECHNIQUE
2.1General
2.2TransmittedCode
2.3Stability
2.4Distortion
2.5PercentModulation
2.6ReceivedCode
3.0ASSIGNEDCODES
3.1TransmittedTones
3.2CodeAssignmentDirectory
TableofToneFrequenciesandDerivationofthe
Frequencies
FIGURE1-SELECTIVECALLINGCODEMAKEUP
PARTIIAIRBORNESELECTIVECALLINGUNIT
1.0GENERALDESCRIPTION
1.1Function
1.2Components
1.3ApplicablePublications
1.4Interchangeability
1.4.1CompleteUnitInterchangeability
1.4.2GenerationInterchangeability
1.5RegulatoryApproval
2.0INTERCHANGEABILITYSTANDARDS
2.1Introduction
2.2FormFactorandConnector
2.3Interwiring
2.4PrimaryPowerInput
2.5SystemFunctionandSignalCharacteristics
2.6EnvironmentalConditions
2.7Cooling
2.8GroundingandBonding
3.0SYSTEMDESIGNCONSIDERATIONS
3.1SELCALOperation
3.2ElectricalRequirements
3.2.1InputImpedance
3.2.2ToneCodeAcceptance
3.2.3ToneCodesand-Selection
3.2.3.1ToneCodes
3.2.3.2CodeSelection
TableofToneFrequenciesandCodeSelection
3.2.4AnnunciatorLightSignal
3.2.4.1ChimeOutput
3.2.4.2SwitchingCircuitCharacteristics
3.2.4.3Reset
3.2.5FalseOperation
3.2.5.1Rejectionofoutoftolerancetonecodes
3.2.5.2Rejectionofundesiredinputsignals
3.2.6SelfTest
3.3AnnunciatorPanel
3.4RemoteCodeSelection
ATTACHMENTSPARTII
1INTERWIRING
1NOTESAPPLICABLETOTHEINTERWIRING
2ENVIRONMENTALCONDITIONS
3ANNUNCIATORPANEL
4CODESELECTIONPANEL
5TYPICALANNUNCIATORINTERWIRING
6OPTIONALANNUNCIATORINTERWIRING
7COMBINATIONCODESELECTION/ANNUNCIATORPANELS
PARTIIIGROUNDSELECTIVECALLINGUNIT
1.0GENERALDESCRIPTION
1.1Function
1.2Components
1.3ApplicationtoExistingTransmitters
2.0ELECTRICALPERFORMANCEREQUIREMENTS
2.1FrequencyStability
2.2ToneAmplitudeStability
2.3FormationofToneCodes
2.4EnvironmentalConditions
2.5ToneFrequencies
2.6ElectricalPower
3.0MECHANICALDESIGN
3.1ControlPanel
3.2ToneGenerator,TimerandPowerSupply
PARTIVLISTOFSELECTIVECALLINGCODES
Abstract
Covers system requirements for a ground-to-air Selective Calling System. Permits the selective calling of individual aircraft over normal radio communications circuits linking the ground station with the aircraft.
