Avidyne AMX240 Manual

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AMX240 Audio Panel | PILOT GUIDE
TABLE OF CONTENTS
SYSTEM OVERVIEW......................................................................1
FUNCTIONAL OVERVIEW .............................................................1
BEZEL CONTROLS ........................................................................2
Pilot Volume Knob ................................................................................... 2
Copilot/Passenger Volume Knob ............................................................. 3
Transceiver Selection .............................................................................. 3
Split Button .............................................................................................. 5
Monitor Buttons........................................................................................ 6
Navaid Receiver Selection Button............................................................ 6
Speaker Button ........................................................................................ 7
Marker Beacon Button ............................................................................. 8
Mute Button ............................................................................................. 8
Intercom Isolate Button and Display......................................................... 9
Music Button.......................................................................................... 10
Telephone Button................................................................................... 10
Replay Button ........................................................................................ 11
POWER ON/OFF...........................................................................12
ADDITIONAL FUNCTIONS ...........................................................13
Integration with Avidyne IFDs................................................................. 13
Intercom................................................................................................. 14
Unswitched INputs................................................................................. 14
Marker Beacon ...................................................................................... 15
Auxiliary Inputs ...................................................................................... 16
Music Distribution................................................................................... 16
Bluetooth® Pairing and usage................................................................ 20
Front Panel Jack- “Smart Jack”.............................................................. 21
BRIGHTNESS AND LIGHTING CONTROLS ................................22
ABNORMAL OPERATIONS ..........................................................22
Fail Safe Operation................................................................................ 22
PLUG AND PLAY DETAILS ..........................................................23
INDEX……………..........................................................................25

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SYSTEM OVERVIEW
This manual assumes that the pilot is appropriately licensed, is
proficient in operation of the aircraft and its equipment, and is in
compliance with all Federal Aviation Regulations (FARs).
All images contained in this manual are for reference use only,
and are subject to change.
Avidyne strongly recommends that pilots use the AMX240 system
only under VFR conditions until completely familiar with its
operation and use.
Boxed areas marked as NOTE within this manual identify certain
situations or areas of operation having safety implications. While
it is important for the operator to be familiar with all of the
information in the manual, it is essential to the safe use of the
AMX240 that pilots give careful attention to the material contained
within these NOTEs.
AMX240 Audio Panel
The AMX240 is a panel-mount audio panel that meets all the
requirements for both IFR and VFR flight.
FUNCTIONAL OVERVIEW
The Avidyne AMX240 Audio Panel supports the following
functions:
•Dual Transceiver Support;
•6-position Intercom System;
•Monitor Capability;
•Split Mode;
•Cockpit Speaker Control;

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•Marker Beacon Receiver and Audio Control;
•Crew Isolation;
•Full-duplex telephone (wired and Bluetooth®) Support;
•Bluetooth® Music Support;
•Music Source Selection;
•Muting Control;
•Audio Replay;
•External Audio Jack Support.
COOL FEATURE
Automatic Squelch Control
The PS Engineering designed intercom squelch
control monitors each microphone input and
instantly opens when human speech is detected.
This results in no clipping of initial speech or
excessive noise. Nor is there any need for manual
squelch adjust.
BEZEL CONTROLS
PILOT VOLUME KNOB
The left knob on the bezel controls the pilot position intercom
volume. Max volume is reached at the clockwise stop. Minimum
volume is reached just prior to the full counter-clockwise detent
stop.
There is a white tick mark that indicates the current volume
setting.

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NOTE
Full Counter Clockwise Detent is Power On/Off
Use care when adjusting the pilot position intercom
volume to avoid inadvertently reaching the full
counter-clockwise detent which powers the unit off.
COPILOT/PASSENGER VOLUME KNOB
The right side knob on the bezel is a dual concentric knob where
the outer knob controls the passenger positions intercom volume
and the inner knob controls the co-pilot position intercom volume.
Max volume is reached at the clockwise stop and minimum
volume is reached at the counter-clockwise stop.
There is a white tick mark that indicates the current volume
setting.
TRANSCEIVER SELECTION
Transceiver Selection Controls
There are two pushbuttons associated with the transmitter
selection. The two left buttons (MIC 1 & MIC 2) control which
transceiver is selected for transmit. The right column of
pushbuttons (COM 1 & COM 2) allows selection of the receiver
audio. Push the MIC button to select the desired transmitter.
The AMX240 has an automatic selector system. Audio from the
selected transceiver is automatically heard in the headsets and
speaker (if selected). When switching from MIC 1 transmitter to
MIC 2 transmitter by pressing the MIC 2 transmitter selector

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pushbutton, the associated COM 2 pushbutton indicator will turn
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 Com audio back on, after
changing transmitters.
When switching from MIC 1 to MIC 2 while COM 2 audio 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.
If both COM 1 and COM 2 are selected for receive, then both will
be heard equally.
The selected MIC button will flash green during com
transmission.
In normal (not split) modes, the AMX240 gives priority to the
pilot’s radio Push-To-Talk (PTT). If the co-pilot is transmitting, and
the pilot presses their PTT, the pilot’s microphone will be heard
over the selected com transmitter.
The co-pilot will also be able to transmit on the selected radio with
their PTT as well.

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SPLIT BUTTON
Split mode allows the pilot to transmit on COM 1 while the co-pilot
transmits on COM 2.
Irrespective of the previous selections, selecting SPLIT will place
the pilot position on COM 1 and the co-pilot position on COM 2.
When SPLIT is active, the following buttons will be green:
MIC 1, COM 1, MIC 2, COM 2.
When the split mode is activated, the intercom between the pilot
and co-pilot is inhibited, although the passengers can still talk
among themselves. This is indicated by the intercom segment
lights all turning off.
The SPLIT button does not light up in green when active.
The crew intercom can be reactivated if desired by pressing the
“ISOL” button as required to get the PLT to CPLT segment to light
in green.
NOTE
No Intercom Segments Lit in Split Mode
When first pressing SPLIT mode, all Intercom
segments are turned off. Pressing the ISOL button
will re-enable intercom during SPLIT mode between
the PLT and CPLT positions.

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MONITOR BUTTONS
MON 1 and MON 2 monitors audio output from the COM 1 and
COM 2 IFD Standby channel(s).
The buttons turn green when active.
Dual radio monitor capability allows the pilot to listen to the
standby frequency while still being able to transmit and receive on
the primary frequency.
NAVAID RECEIVER SELECTION BUTTON
These buttons select audio from desired nav radio source to be
heard in the headsets.
Each button turns green when active.
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