Installation manual

AMX240 Audio Panel Installation Manual
200-890-0240 Rev. 02
Section III OPERATION
3.1 SCOPE
This section provides detailed operating instructions for the Avidyne AMX240, Audio Selector Panel/Marker Be a-
con Receiver/Intercom Systems. Please read it carefully before using the equipment so that you can take full ad-
vantage of its capabilities.
This section is divided into sections covering the basic operating areas of the AMX240 systems. They are Commu-
nications Transceiver Selection, Audio Selector, Intercom, Marker Beacon Receiver and special functions, including
the Bluetooth® functionality in the AMX240.
Figure 3-1 AMX240 Operating Controls
Unit power is turned on by turning the left side volume knob clockwise. When the knob is fully counterclockwise,
the AMX240 is OFF or "Fail-Safe" position, the pilot headset is connected directly to COM 1 as well as unswitched
input #1. This allows communication capability regardless of unit condition. Any time power is removed or the unit
is turned OFF, the audio selector will revert to fail-safe mode.
The power switch controls all audio selector panel functions, intercom and marker beacon receiver. All pushbutton
selections will be remembered and return to the last state when turned on.
3.2 Communications Transmit (XMT) (2) and Receive Selection (3)
There are two pushbuttons associated with the transmitter selection. The MIC1 and MIC2 buttons (# 2) control
which transceiver is selected for transmit. The COM1 and COM2 pushbuttons (# 3) allow selection of the receiver
audio. Push the MIC button to select the desired COM transmitter.
The AMX240 has an automatic selector system. Audio from the selected transceiver is automatically heard in the
headsets and speaker (if selected). You can check this function by switching from one transmitter to the other trans-
mitter by pressing the MIC2 transmitter selector pushbutton. See that the associated receiver pushbutton indicator
light turns green. This guarantees that the pilot will always hear the audio from the transceiver selected for transmit.
The AMX240 “remembers” the receiver selection, so that when switching transmitters from MIC 1 to MIC 2, if
COM 2 audio was previously selected, COM 1 audio will continue to be heard. This eliminates the pilot having to
switch the audio back on, after changing transmitters.
When switching from MIC 1 to MIC 2 while COM 2 was not previously selected, COM 1 audio will be switched
off. In essence, switching the mic selector will not override prior selection of COM receiver audio.
In normal (not split) modes, the AMX240 gives priority to the pilot’s radio Push-To-Talk (PTT). If the copilot it
transmitting, and the pilot presses his PTT, the pilot’s microphone will be heard over the selected com transmitter.
In TEL (  ) mode, the pilot microphone and headphones are connected to the cell phone. The pilot PTT will switch
the pilot mic to the selected com transceiver, and allow continued aircraft communications to continue. (See Section