Table of Contents
Foreword
1.0Purposeandscope
1.1Introduction
1.2Systemoverview
1.2.1Basicsystemdescription
1.2.2Background
1.2.3Futuredirection
1.2.4Transitionstrategy
1.3Operationalapplications
1.4Operationalgoals
1.4.1Sensitivity
1.4.2Receiverselectivity
1.4.3Spuriousresponse,crossmodulationand
intermodulation
1.4.4Bearingaccuracy
1.5Assumptions
1.5.1Fieldstrength
1.5.2Selectivity
1.5.3Warningandflags
1.6Testprocedures
1.6.1Environmentaltests
1.6.2Benchtests
1.6.3Installedsystemtests
1.6.4Operationaltests
1.7Definitionofterms
2.0Automaticdirectionfindingequipment
performancerequirementsandtestprocedures
2.1Generalrequirements
2.1.1Airworthiness
2.1.2Intendedfunction
2.1.3FederalCommunicationCommissionrules
2.1.4Fireprotection
2.1.5Operationofcontrols
2.1.6Accessibilityofcontrols
2.1.7Effectsoftest
2.2Equipmentperformance-standardconditions
2.2.1Tuningresolution
2.2.2Groundstationinteroperability
2.2.3Sensitivity(MCWreceiverfunction)
2.2.4Sensitivity(CWreceiverfunction)
2.2.5Bearingaccuracy(ADFfunction)
2.2.6Stationpassage(ADFfunction)
2.2.7Audiofrequencyresponse
2.2.8Audiooutputlevelvariationwithloadimpedance
2.2.9Distortion
2.2.10AGCcharacteristics
2.2.11Receiverselectivity(MCWreceiverfunction)
2.2.12Receiverselectivity(ADFfunction)
2.2.13Spuriousresponse
2.2.14Crossmodulation
2.2.15Intermodulation
2.2.16Directionfinderoperationwithbeatfrequency
oscillator
2.3Equipmentperformance-environmentalconditions
2.3.1Temperatureandaltitudetests
2.3.2Temperaturevariationtest
2.3.3Humiditytest
2.3.4Shocktests
2.3.5Vibrationtests
2.3.6Explosiontest
2.3.7Waterproofnesstest
2.3.8Fluidssusceptibilitytests
2.3.9Sandanddusttest
2.3.10Fungusresistancetest
2.3.11Saltspraytest
2.3.12Magneticeffecttest
2.3.13Powerinputtests
2.3.14Voltagespikeconductedtest
2.3.15Audiofrequencyconductedsusceptibilitytest
2.3.16Inducedsignalsusceptibilitytest
2.3.17Radiofrequencysusceptibilitytest
2.3.18Emissionofradiofrequencyenergytest
2.4Equipmenttestprocedures
2.4.1Definitionsoftermsandconditionsoftest
2.4.2Detailedtestprocedures
3.0Installedequipmentperformance
3.1Testconditions
3.1.1Powerinput
3.1.2Associatedequipment
3.1.3Environment
3.1.4Adjustmentofequipment
3.1.5Warm-upperiod
3.2Equipmentinstallation
3.2.1Equipmentaccessibility
3.2.2Displayvisibility
3.2.3Interferenceeffects
3.2.4Dynamicresponseduringmaneuvers
3.2.5Inadvertentturnoff
3.2.6Aircraftpowersource
3.3Minimuminstalledequipmentperformance
3.3.1Controlsanddisplays
3.3.2Audioreception
3.3.3Bearingaccuracy
4.0Operationalcharacteristics
4.1Requiredoperationalcharacteristics
4.1.1Powerinput
4.1.2Equipmentoperatingmodes
4.2Testproceduresforoperationalcharacteristics
4.2.1Powerinput
4.2.2Equipmentoperatingmodes
Membership Abstract
Defines operational goals and applications and recommends standards and test procedures for airborne automatic direction finding equipment.
