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Advanced Audio Panel Operations for CAP: Understanding Features and Troubleshooting

This guide covers the intricate features of the PS Engineering Audio Panel, particularly for Civil Air Patrol (CAP) operations. It highlights complexities compared to older models like the KMA-24 and provides insights into isolating pilots from crew communications, activating various radio frequencies, and utilizing intercom modes effectively. It also addresses potential operational issues and troubleshooting steps, ensuring crews maximize their audio communication capabilities during missions, especially in crowded airspace or search scenarios.

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Advanced Audio Panel Operations for CAP: Understanding Features and Troubleshooting

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  1. PS Engineering Audio Panel and other Audio Switchology Maj. Jeff Knutson

  2. PS Engineering Audio Panel • Additional features for CAP operations • More complicated than older units like KMA-24’s • May be confusing if crew unfamiliar with operation

  3. Features • Can isolate pilot from rest of crew • Useful in searches with heavy ATC or CAP communications • Can isolate front seat from back seat • Can have pilot talking on different frequency than observer • Can swap frequencies • Sometimes inadvertently!

  4. Marker Sensitivity Switch (3 position) • High • Low • Test (lights) • Intercom volume • Does not affect radio volume • Push in to turn audio panel on/off • Marker Beacon Lights (same as other units) Operation

  5. ISO • Only pilot hears radios – Isolated from crew • Observer and scanners have intercom • Observer hears Com3 Intercom Modes

  6. All • Everybody hears everything Intercom Modes

  7. Crew (i.e. front seat) • Pilot and Observer hear radios • Front seat isolated from rear seat • Rear seats have separate intercom and no radios Intercom Modes

  8. Activates audio for communication radio 1 • Operation just like other audio panels • Green light illuminates when activated COM1

  9. COM2 • Activates audio for communication radio 2 • Operation just like other audio panels • Green light illuminates when activated

  10. NAV1, NAV2, MKR, ADF, DME • Activates audio for selected radio • Operation just like other audio panels • Green light illuminates when activated

  11. ICS (Intercom) • Opens intercom between pilot and observer during split modes • Green light illuminates when activated • If not selected when split mode is selected pilot will again be isolated!

  12. COM3 • Activates audio for CAP FM radio • Green light illuminates when activated

  13. SPR (Speaker) • Turns on cabin speaker • Operation just like other audio panels • Green light illuminates when activated

  14. Transmitter Select Knob • Selects on which radio the pilot and observer will transmit

  15. Transmitter Select Knob • Pilot: COM1 • Observer: COM1

  16. Transmitter Select Knob • Pilot: COM2 • Observer: COM2

  17. Transmitter Select Knob • Pilot: COM3 (CAP FM) • Observer: COM3 (CAP FM)

  18. Transmitter Select Knob - Split • Pilot: COM1 • Observer: COM2 • Don’t forget about ICS button!

  19. Transmitter Select Knob - Split • Pilot: COM1 • Observer: COM3

  20. Transmitter Select Knob - Split • Pilot: COM2 • Observer: COM3

  21. Transmit Light • Illuminates when crewmember is transmitting on selected radio

  22. Swap Light • Illuminates when swap mode is selected on control yoke • Effects determined by transmitter select switch position • Swap button is the same type and is right next to the mic button • Very easy hit hit accidentally • Verify swap light mode when transmitting Look out for this!

  23. Swap Light Effects • Toggles between COM1 (no light) and COM2 (light)

  24. Swap Light Effects • Toggles between COM2 (no light) and COM1 (light)

  25. Swap Light Effects • No swap

  26. Swap Light Effects • Pilot COM1, Observer COM2 (no light) • Pilot COM2, Observer COM1 (light) • Again, in split mode, if ICS not selected pilot will be isolated

  27. Swap Light Effects • Pilot COM1, Observer COM3 (no light) • Pilot COM3, Observer COM1 (light)

  28. Swap Light Effects • Pilot COM2, Observer COM3 (no light) • Pilot COM3, Observer COM2 (light)

  29. DF Audio Switch • Note there is no ELT DF button on audio panel • How does the crew hear ELT’s? Remote panel switch

  30. DF Audio Switch • Remote DF Audio toggle must be switched up to the ON position • Turning up the volume on the DF unit won’t help if the DF audio is switched OFF

  31. Problems • Pilot can’t hear the Observer. What could cause this? • Audio panel turned off • Intercom in ISO mode • Transmitter select switch in split mode and ICS button not activated • ATC has been quiet, and now they don’t reply to my calls • Check swap mode – might have hit it on the last transmission and have been listening to the wrong frequency for the last 15 minutes

  32. Problems • The scanner can’t hear the front seat crew or radios? • Intercom in Crew mode • Headset is unplugged • The crew can’t hear the ELT beacon • Volume on DF unit is too low • The remote DF audio switch is turned off

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