Installation manual

AMX240 Audio Panel Installation Manual
200-890-0240 Rev. 02
Inputs 1, 2 and 4 are fixed (1:1), and any audio level adjustments must be made at the input source. Unswitched #3
has a variable adjustment control located on the bottom side of the unit. This control allows you to adjust the volume
level of that unswitched input. Refer to Adjustments § 2.7.
The front panel jack can be configured to act as a fifth unswitched input. When configured through the front panel
function switches (see operational section), the audio input to this jack will be presented to the pilot and copilot
headsets, and not muted.
NOTE
The front-mounted utility jack is intended for portable equipment that is advisory in nature. It is NOT INTENDED
for use as a primary warning channel. Audio of importance MUST ALWAYS be hard-wired into the unswitched
inputs of the audio panel.
2.4.7 "Swap" Mode
When a momentary, normally open, push-button switch is connected between pin 20 on the J2 connector and aircraft
ground, the user can switch between COM 1 and 2 by depressing this switch without having to turn the mic selector
switch. This yoke-mounted switch eliminates the need to remove your hands from the yoke to change transceivers.
The transfer of MIC indication from COM 1 to COM 2 shows that the swap has been initiated; there is no dedicated
swap indicator.
2.4.8 TEL (Duplex) Function for Cell Phones
Audio streams selected by the intercom mode are provided to the Tel output, and audio from Tel is presented to the
headset. This allows a telephone-like audio interface.
The TEL mode in the AMX240 is compatible with many cellular telephones with hands-free headset interfaces. The
front panel 3/32” utility jack can be used as the interface to the Cell Phone, or a jack can be installed somewhere on
the aircraft panel. The wired interface jack is connected with the AMX240 as shown:
3/32" Cellular Jack
COM 3 Mic Input
Com 3 Audio
Audio Lo
3
5
4
Audio Panel
J1
Cellular Plug (typical)
Tip= Microphone out
Ring= Speaker audio
Base=Ground
This is a typical interconnect
Avidyne does not guarantee
compatability in all cases.
Cellular Phone
Interconnect
Figure 2-1 Cellular telephone interface for rear connector, if an additional jack is desired
The AMX240 is compatible with most Bluetooth® enabled devices for making and receiving telephone calls
through the aircraft audio system.
2.4.8.1 Cell phone Sidetone
As shipped from the factory, the AMX240 provides cellular telephone sidetone (the user’s voice fed back to the
headset). Some cell phones do provide sidetone. Telephone sidetone can be disabled by pressing the NAV 2 button
for more than one second when power is on.
NOTE
Unauthorized use of unapproved cellular telephone devices in aircraft is subject to FCC enforcement action, which
may include a $10,000 fine per incident.
FCC Regulation 47 CFR § 22.925 Prohibition on airborne operation of cellular telephones.