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Garmin GMA 240 Installation Manual

Also see for GMA 240: Pilot's guideInstallation manual

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Contents
  1. Table Of Contents
  2. general description
  3. technical specifications
  4. reference documents
  5. limited warranty
  6. installation overview
  7. gma 240 mounting
  8. installation procedure
  9. audio shield termination
  10. post installation checkout
  11. configuration adjustments
  12. system interconnects
  13. aircraft power and lighting
  14. configuration pins
  15. audio inputs/outputs and mic keys
Garmin GMA 240 Installation Manual Manual pdf 29 page image
GMA 240 Installation Manual Page 4-5190-00917-01 Rev. A4.4 Configuration Pins4.4.1 External Configuration PinsThe following pins may be used to change the configuration of the installation as described.Pin Connector Pin Name Description16 P2401 MASQINHIBIT*INGround to disable Master Avionics Squelch circuitry. Thiswill cause alerts and selected radios to be heard at all timeswithout needing to exceed the mute threshold. This causesan increase in background noise from the inputs during quietoutput.29 P2401 CREWISO* INGround to configure the unit for CREW ICS isolation. In thisconfiguration, the copilot headset jack should be wired inparallel with the pilot headset output. The mics are wired asnormal. In this mode, when the PILOT ISO button isselected, the pilot and copilot will hear each other, but will beintercom isolated from the passengers.13 P2402 PILOT ISOMUSIC* INGround to allow Music audio to be heard by the pilot duringpilot isolate mode.19 P2402 BUTTONPRESSTONEENABLE*INGround to enable beep tone annunciation of button presses30 P2402 MUTE ONCOM TX*INGround to enable muting of other selected radios during micselected COM transmission (mic-selected COM is still heard,but not other selected radios)* Denotes Active Low (Ground to activate)
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This manual is suitable for:
GMA 240
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