Audio Panel Operation | N |
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COMMUNICATION AND NAVIGATION AUDIO OPERATION
Pressing any of the communication (COM) or navigation (NAV, ADF, DME, AUX, or MKR) audio selector buttons enables the associated audio and the LED above the button is lit. Pressing the same audio selector button again turns the audio for that channel and the LED above the button off. The pilot and copilot can select and listen to more than one communication or navigation audio at a given time.
DUAL KMA 29 OPERATION
When two KMA 29 audio panels are installed, both have access to the communications transceivers. When both panels have selected the same transmitter, the KMA 29 designated as the pilot position has prior- ity.
Indication arrows above the microphone selectors indicate which side has selected the radio for transmit. Offside radio indication is user selec- table. When the offside indication is off, only the mic select arrow for the KMA 29 position is active. When on, the pilot can see which radio the copilot has selected for transmit, and vice versa, by noting which of the arrows is illuminated.
To toggle the offside transmit selection indication, press the right side of the SPLIT button three (3) times within one and a half (1 1/2) seconds. When the mode is activated, the NAV 1 indicator blinks once. When the mode is toggled off, the NAV 1 indicator blinks twice. This mode remains in effect until changed by the user, including power cycles.
EMERGENCY OPERATION
NOTE: In the event of a failure or loss of power to the audio panel, the PUSH EMG/OFF power switch should be pressed. When pressed, both pilots’ microphones are directly connected to the COM 1.
The PUSH EMG/OFF (Power On and Emergency/Off) switch is a two position switch. One position is On (implied) and the other position is EMG/OFF. The Emergency and Off modes of operation are identical.
In the EMG/OFF position, the pilot is connected directly to COM 1 trans- mit and COM 1 receive through the headphones only. This allows com-
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12 | KMA 29 Audio Panel Pilot’s Guide | Sep/07 |