Table of Contents
PARTISELECTIVECALLINGSYSTEMSPECIFICATION
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
TableITableofToneFrequenciesandDerivationof
theFrequencies
FigureISelectiveCallingCodeMakeup
PARTIIAIRBORNESELECTIVECALLINGUNIT
1.0GeneralDescription
1.1Function
1.2Components
1.3ApplicablePublications
1.4Interchangeability
1.4.1
1.4.2GeneralInterchangeability
1.5RegulatoryApproval
2.0INTERCHANGEABILITYSTANDARDS
2.1Introduction
2.2FormFactorandConnector
2.3Interwiring
2.4PrimaryPowerInput
2.5SystemFunctionsandSignalCharacteristics
2.6EnvironmentalConditions
2.7Cooling
2.8GroundingandBonding
3.0SYSTEMDESIGNCONSIDERATIONS
3.1SELCALOperation
3.2ElectricalRequirements
3.2.1InputImpedance
3.2.2ToneCodeAcceptance
3.2.3ToneCodesandSelection
3.2.4AnnunciatorLightandChimeSignals
3.2.4.1Operation
3.2.4.2SwitchingCircuitCharacteristics
3.2.4.3Reset
3.2.5FalseOperation
3.2.6SelfTest
3.3AnnunciatorPanel
3.4RemoteCodeSelection
TableIITableofToneFrequenciesandCodeSelection
Attachment1Interwiring
NotesApplicabletoInterwiring
Attachment2EnvironmentalConditions
Attachment3AnnunciatorPanel-TypicalLayout
Attachment4CodeSelectionPanel-TypicalLayouts
Attachment5TypicalAnnunciatorInterwiring
Attachment6OptionalAnnunciatorInterwiring
Attachment7CombinationCodeSelection/AnnunciatorPanels
Attachment8SELCALUnitConnectorPositioning
PARTIIIGROUNDSELECTIVECALLINGUNIT
1.0GeneralDescription
1.1Function
1.2Components
1.3ApplicationtoExistingTransmitters
2.0ELECTRICALPERFORMANCEREQUIREMENTS
2.1FrequencyStability
2.2ToneAmplitudeStability
2.3FormationofToneCodes
2.4EnvironmentalConditions
2.5ToneFrequencies
2.6ElectricPower
3.0MECHANICALDESIGN
3.1ControlPanel
3.2ToneGenerator,Timer,andPowerSupply
ListofSelectiveCallingCodes Abstract
Covers the characteristics of Ground-to-air selective calling system. This system allows selective calling of individual aircraft over radio communications circuits linking the ground station to the aircraft. Elements comprising overall system are ground selecting calling unit (coder), ground-to-air transmitter (HF or VHF), airborne receiver (HF or VHF), airborne selective calling unit (decoder), and code selection panel.
