AlliedSignal KMA 24 audio panel marker beacon receiver Maintenance manual

Below you will find brief information for audio panel marker beacon receiver KMA 24. The KMA 24 is a audio panel with both speaker and headphone isolation amplifiers and a marker beacon receiver. The separate isolation amplifiers provide complete independence of speaker and headphone selection. This allows the same audio input to be selected for both headphones and speaker and still retain isolation between inputs.

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KMA 24 Audio Panel Marker Beacon Receiver Maintenance Manual | Manualzz

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Key features

  • Speaker and headphone isolation amplifiers
  • Marker beacon receiver
  • Independent speaker and headphone selection
  • Three marker beacon tone filters
  • Audio mute circuit
  • Adjustable sensitivity for marker beacon reception
  • Lamp test function
  • Middle marker sense output

Frequently asked questions

The separate isolation amplifiers in the KMA 24 provide complete independence of speaker and headphone selection. This allows the same audio input to be selected for both headphones and speaker and still retain isolation between inputs.

The KMA 24 can select a maximum of 9 audio inputs (including the internal marker receiver audio), or 8 audio inputs if the AUTO function is utilized.

The marker beacon receiver in the KMA 24 detects and decodes marker beacon signals, providing audio output and visual indication of the beacon's presence.

The audio mute circuit in the KMA 24 uses a J-FET to mute the audio output when the microphone is keyed, preventing feedback that could cause oscillation during transceiver transmission.

The lamp test function allows the pilot to verify that all the marker lamps are functioning correctly.
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