EN
1
Front Panel
Power On and Fail-Safe Operation
The audio panel is turned on and off by pressing the volume control knob
(smaller, inner knob on left side of unit).
When the system is turned off or if power is removed the audio panel will be
placed in the fail-safe mode. In the off or fail-safe mode, the pilot is
connected directly to Com 1 and to unswitched input 1, allowing transmit,
receive and alert capability regardless of audio panel condition.
The fail-safe audio will only be heard in the left ear of a stereo headset.
Transmitter Selection
To select a radio for transmission, press either the XMT1 or the XMT2 button;
the green indicator lamp above the button will light up, indicating which radio
you will transmit on. The corresponding COM1 or COM2 indicator will also
light up; you always hear the audio from the transceiver that is selected for
transmit.
Both pilots can transmit on the selected radio, but only the person who presses
their Push-To-Talk switch will be heard over the aircraft radio.
Receiver Selection
To listen to both radios press the COM1 or COM2 button as required to
enable the second radio. Both radios will remain selected until one is
manually deselected.
Navigation Audio Selection
The MKR, NAV1, NAV2, DME and ADF buttons select the switched navigation
receivers. Press once to turn on the corresponding source, press again to turn
