ARINC 538B:1981
ARINC 538B:1981 Hand-held Microphone Describes a hand-held microphone for use with airborne radio installations.
Table of Contents
1.0INTRODUCTIONANDDESCRIPTION1.1ScopeandFunction
1.2AssociatedEquipment
1.3ApplicablePublications
1.4RegulatoryApproval
2.0MECHANICALCONSIDERATIONS
2.1Weight
2.2Protection
2.3Preamplifier
2.4FormFactor
2.5Cord
2.6Connector
3.0ELECTRICALCHARACTERISTICS
3.1MicrophoneElement
3.2PreamplifierPowerFeedCircuitry
3.3Sensitivity
3.3.1Distortion
3.3.2FrequencyResponse
3.3.3InternalOutputImpedance
3.3.4HumRejection
3.3.5ParallelOperation
3.4Switch
3.5Plug
3.6RecommendationsforMicrophoneInput-Circuit
StandardsinFutureEquipment
3.74-WireMicrophoneInterconnection
ATTACHMENTS
1MicrophoneFormFactorandStowage
2ElectricalInterfaceForPerformanceMeasurements
3Microphone-PreamplifierFrequencyResponseLimits
4AMethodofMeasuringtheInternalOutputofthe
Hand-HeldMicrophone-PreamplifierCombination