SPECIAL NOTICE
This product is now licensed to Anodyne Electronics Manufacturing (AEM) from Northern
Airborne Technology (NAT). AEM is responsible for all matters related to this product, including
sales, support and repair services.
Please note the transition to convert product manuals and supporting documentation is an
ongoing process and is being addressed on an ‘as needed’ basis.
All references to NAT product part numbers (and associated images) are equivalent to AEM
product part numbers.
Contact info:
Anodyne Electronics Manufacturing Corp.
#15-1925 Kirschner Road
Kelowna B.C. Canada
V1Y 4N7
Email: support@aem-corp.com
Toll Free: 1-888-763-1088
Phone: 1-250-763-108 8
Fax: 1-250-763-1089
www.aem-corp.com
INSTALLATION AND OPERATION MANUAL
SM19
AMS42/AMS44 Series
Dual Channel Audio Controllers
© 2012 Anodyne Electronics Manufacturing Corp. (AEM),
REV 5.00 May 29, 2012
Anodyne Electronics Manufacturing Corp.
15-1925 Kirschner Road
Kelowna, BC, Canada.
V1Y 4N7
Telephone (250) 763-1088
Facsimile (250) 763-1089
Website: www.aem-corp.com
All Rights Reserved
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
COPYRIGHT STATEMENT
© 2012 Anodyne Electronics Manufacturing Corp. (AEM), All Rights Reserved
This publication is the property of AEM and is protected by Canadian copyright laws.
No part of this document may be reproduced or transmitted in any form or by any
means including electronic, mechanical, photocopying, recording, or otherwise, without
the prior written permission of AEM.
Installation and Operation Manual Page ii
ENG-FORM: 820-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
Prepared By:
Checked By:
Approved By:
Section
Revision Number
Revision Description
Date
All
Rev: 5.00
Updated drawings and template
May 29, 2012
SM19 Installation and Operation Manual
Tony Pearson
Designer
May 29, 2012
Loen Clement
Designer
Jun 11/12
Tom Betzelt
Product Support
Manager
June 11, 2012
The status of this installation and operation manual is controlled by the revision shown on the title page.
The status of each section is controlled by revision shown in the footer of each page. All revisions
affecting sections of this manual have been incorporated.
AEM MANUAL REVISIONS
Installation and Operation Manual Page iii
ENG-FORM: 820-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
Table of Contents
Section Title Page
1.0 Description
1.1 Introduction 1-1
1.2 Purpose of Equipment 1-1
1.3 Features 1-1
1.3.1 Transmit Features 1-2
1.3.2 Receive Features 1-2
1.3.3 ICS Features 1-2
1.4 Specifications 1-3
1.4.1 Electrical Specifications 1-3
1.4.2 Physical Specifications 1-3
1.4.3 Environmental Specifications 1-4
1.5 Unit Nomenclature 1-4
2.0 Installation
2.1 Introduction 2-1
2.2 Unpacking and Inspection 2-1
2.2.1 Warranty 2-1
2.3 Continued Airworthiness 2-1
2.4 Installation Procedures 2-1
2.4.1 Warnings 2-1
2.4.2 Cautions 2-2
2.4.3 Cabling and Wiring 2-2
2.5 Adjustments and Connections 2-2
2.5.1 Top Panel Adjustments 2-3
2.5.2 Right Side Adjustments 2-4
2.5.3 Left Side Adjustments 2-5
2.5.4 Post-Installation Checks 2-6
2.5.5 Accessories Required But Not Supplied 2-6
2.6 Installation Drawings 2-7
3.0 Operation
3.1 AMS42 – General Operation 3-1
3.2 AMS42 – Audio Alerting Functions 3-1
3.3 AMS42 – Selection of Transmit Functions 3-2
3.3.1 Transmit Selectors 3-2
3.3.2 Hand Microphone 3-2
3.4 AMS42 – Transceiver Receive Functions 3-3
3.4.1 Receive Selection Switches 3-3
3.4.2 Transceiver Selection Examples 3-3
3.4.3 Volume Controls 3-4
3.4.4 Passenger Receive Audio Selection 3-4
3.4.5 Auxiliary Inputs 3-4
3.5 AMS42 – Intercom Functions 3-4
3.5.1 ICS Modes of Operation 3-5
Installation and Operation Manual Page iv
ENG-FORM: 820-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
Section Title Page
3.5.2 Passenger ICS Operation 3-5
3.6 AMS42 – Mode Control 3-6
3.6.1 Emergency Operation 3-6
3.6.2 Isolation Operation 3-6
3.7 AMS44 – General Operation 3-7
3.8 AMS44 – Audio Alerting Functions 3-7
3.9 AMS44 – Selection of Transmit Functions 3-8
3.9.1 Transmit Selectors 3-8
3.9.2 Hand Microphone 3-9
3.10 AMS44 – Transceiver Receive Functions 3-9
3.10.1 Receive Selection Switches 3-9
3.10.2 Transceiver Selection Examples 3-10
3.10.3 Volume Controls 3-10
3.10.4 Passenger Receive Audio Selection 3-11
3.10.5 Auxiliary Inputs 3-11
3.11 AMS44 – Intercom Functions 3-11
3.11.1 ICS Modes of Operation 3-12
3.11.2 Passenger ICS Operation 3-12
3.12 AMS44 – Mode Control 3-13
3.12.1 Emergency Operation 3-13
3.12.2 Isolation Operation 3-14
Installation and Operation Manual Page v
ENG-FORM: 820-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
Section 1.0 Description
1.1 Introduction
This manual contains information on the AMS42 and AMS44 Dual Channel Audio
Controllers. Information in this section consists of purpose of equipment, features and
specifications.
1.2 Purpose of Equipment
The AMS42 and AMS44 are dual channel audio controllers that provide central control of
all aircraft audio. They allow selection of transmit and receive audio, emergency operation
and provide LIVE, KEYED, or VOX intercom. Support for the pilot, co-pilot and five
passengers are provided as well as left or right side pilot configurations.
The purpose of the AMS42 and AMS44 is to provide centralized control for all audio in the
aircraft. This is accomplished by providing positions for up to five transceivers and up to
eight navaids. Other functions such as external PA interface, boom mic support for the pilot
and co-pilot, seven place intercom, emergency and ISO operation, two direct audio inputs
and rear hand mic operation are also provided.
1.3 Features
The AMS42 and AMS44 can be easily configured at the time of installation for pilot
operation from the left or right side of the controller by selection of internal jumpers and
switches accessible through the top cover. The five passenger positions are also
configurable for left or right side operation.
Both controllers provide independent volume control of S/T (sidetone), ICS (intercom)
and RX (receive) audio for left and right side users.
Both controllers utilize active bandpass filtering for RX and ICS operation or maximum
audio clarity in high ambient noise conditions.
May 29, 2012 Rev: 5.00 Page 1-1
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CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
1.3.1 Transmit Functions
Both controllers provide equal transmit capability between left and right sides and
support the use of a hand microphone. The hand mic is internally configured for left or
right side operation, and is connected directly to the selected radio for use during
emergency or equipment failure situations. During transmit operation, the sidetone of
the transceiver in use remains enabled while all other audio, except DIRECT 2, is
muted. This function is specific to each ‘side’ of the audio controller.
Transceiver interfacing is accomplished through directly switched microphones and
ground referenced keylines. To ensure maximum radio compatibility, no diodes or other
steering components are used.
1.3.2 Receive Functions
Selecting a transceiver with the TX (transmit) rotary selector automatically selects the
associated receive audio. The RX inputs are also selected by the 3-position center –off
front panel switches, five on each side of the audio controller – the ‘up’ position selects
the respective navaid input, and the ‘down’ position selects the respective COM.
Two Direct Audio inputs are provided and are configurable for left or right side use.
1.3.3 ICS Functions
LIVE, KEYED or variable VOX ICS operation can be selected from a single control.
The AMS42 and AMS44 use dynamic noise reduction and voice band filtering to provide
the clearest possible ICS audio in high ambient noise conditions.
Transparent ICS for either the pilot or co-pilot allows immediate transmit operation with
no control panel switching. Return to ICS operation is automatic upon completion of the
TX operation.
Isolation and Emergency modes of operation are provided to remove the pilot(s) from
the intercom bus without interfering with normal passenger ICS.
Both controllers provide an ICS Tie line for multiple controller installations.
May 29, 2012 Rev: 5.00 Page 1-2
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CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
1.4 Specifications
1.4.1 Electrical Specifications
Input Power Typically +22 to +32 Vdc at 250 mA
Lighting 160 mA at 28 Vdc
Microphone Requirement ‘Carbon equivalent’ 250 mV into 150Ω min.
(David Clark M1/DC, M3, M4, M7 recommended)
Receive Audio Requirement 25 mW into 600Ω
Headset Power 250 mW per channel into 600Ω
Key Logic Ground seeking for all lines.
‘Hard’ ground outputs to all transceivers.
TX LED on front panel lights when any transmit
Key input is low except hand mic.
Cross-Talk De-selected inputs 50 dB min. Below full output
Bi-directional ICS Tie Line 340 mVrms for full output
1.6kΩ input impedance
1.4.2 Physical Specifications
Height 1.90" (48.3 mm) max.
Length 6.82” (173.2 mm) max. From back of mounting
Surface and excluding mating connectors
Width 5.77" (146.6 mm) max. Front panel
5.02” (127.5 mm) rear enclosure
Weight 2.3 lbs (1.04Kg)
Mounting Standard Dzus Mounting (four fasteners)
Optional Tray Mount
May 29, 2012 Rev: 5.00 Page 1-3
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AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
1.4.3 Environmental Specifications
Temperature: -20q C. to +55q C (ambient)
-55q C. to + 85q C (survival)
Altitude 25,000 feet max
Humidity 95% Non-condensing
Shock 12 g (any axis)
Vibration Conforms to DO-160B category ‘P’
1.5 Unit Nomenclature
The AMS42/44 series are designed to be generic, fixed attribute audio controllers. For
this reason a limited number of models are available. Custom dual channel audio
controllers based on the AMS42 are renamed AA92H series and units based on the
AMS44 are renamed AA94 series.
The models available are:
AMS42 5 front panel selectable transceivers.
8 internal selectable RX inputs.
2 Direct Audio Inputs.
AMS42F Same as AMS42 with faceplate labelling change from COM2
to AUX1 to match OAS/USFS requirements.
AMS42T AMS42 in tray mount configuration.
AMS42FT Combines ‘F’ and ‘T’ models.
AMS44 5 front panel selectable transceivers.
5 front panel selectable navaids.
2 internal selectable RX inputs.
2 Direct Audio Inputs.
AMS44T AMS44 in tray mount configuration.
End of Section 1.0
May 29, 2012 Rev: 5.00 Page 1-4
ENG-FORM: 800-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
Section 2.0 Installation
2.1 Introduction
Installation information in this section consists of unpacking and inspection procedures, installation
procedures, post-installation checks and installation drawings. Check all notes and cautions before
installation.
2.2 Unpacking and Inspection
Unpack the equipment carefull y. Inspect the unit visuall y for damage due to shipping and report all such
claims immediately to the carrier involved. Note that each unit should have the following:
- AMS42/44 Dual Channel Audio Controller
- Product Information Card
- Certificate of Conformity
Verify that all items are present before proceeding and report any shortage immediately to your supplier.
2.2.1 Warranty
All Anodyne Electronics Manuf acturing Corp. (AEM) products are warranted for 2 years. See the website
www.aem-corp.com/warranty for complete details.
2.3 Continued Airworthiness
Maintenance of the AMS42 or AMS44 Dual Channel Audio Controller is ‘on condition’ only. Periodic
maintenance of this product is not required.
2.4 Installation Procedures
2.4.1 Warnings ÍÍIMPORTANT!
Do not bundle any lines from this unit with transm itter coax lines. Do not bundle any lines from
this unit with 400 Hz synchro wiring, or AC power lines. Fail ure to observe these limitations ma y
result in incorrect or intermittent operation, or severe audio interference on received and transmitted
signals.
May 29, 2012 Rev: 5.00 Page 2-1
ENG-FORM: 805-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
2.4.2 Cautions
In all installations, use shield ed cable exactly as shown and ground as indicated. Si gnificant problem s
may result from not following these guidelines.
All audio installations can be seriously degraded by incorrect wiring and shielding, and may result in
abnormal cross-talk, hum and ground -loop noise. Be especially careful with all microphone wiring and
Tie Line wiring, as these lines carry the lowest level signals in the aircraft.
All microphone and headset jacks should be electrically isolated from the airframe or significant gro und
loop noise may result.
Failure to follow the installation and wiring instructions provided in this manual for power and ground
connections, including the rating of the c ircuit breaker, may lead to dam age in the power input circuitry of
the unit.
2.4.3 Cable and Wiring
All unshielded wire shall be selected in accordance with AC43.13-1B Change 1, Paragraphs 11-76
through 11-78. Wire types should be to MIL-W-22759 as specified in AC43.13- 1B Change 1, Para graphs
11-85, 11-86, and listed in T able 11- 11. For shield ed wire applic ations, use T ef zel MIL -C-27 500 sh ielde d
wire with solder sleeves (for shield terminations) to make the most compact and easily terminated
interconnect. Follow the wiring diagrams in Section 2.6 as required.
Allow 3" from the end of the wire to the shield termination to allow the connector hood to be easily
installed. Note that the hood is a "clam shell" hood, and is installe d after the wiring is com plete. Aircraft
harnessing should permit t he unit to be lowered from the panel for easy access to all side adjustm ents.
Do NOT mount the unit until all adjustments have been carried out.
All wiring should be at le ast 24 AWG, except po wer and ground lines, which sho uld be at least 20 AWG.
Ensure that the ground connection is clean and well secured, and that it shares no path with any
electrically noisy aircraft accessories such as blowers, turn and bank instruments or s imilar lo ads. Power
to this unit must be supplied from a separate bre aker (1 amp) or fuse (1 amp fast blow), and not attached
to any other existing breaker without additional protection.
Before the unit is mounted, make all func tional tests and trim pot adjustm ents. Be sure the h arness has
enough clearance to permit the unit to be dropped down for re-adjustment, if needed later. Make sure
that the connector locks are tightened , and the uni t is securely fastened to th e panel before any flight is
attempted.
2.5 Adjustments and Connections
The unit ships from the factory with all inte rna l adjustm e nts set to the normal test levels. Once installed in
the aircraft, it may be desirable to change some of these settings to best suit the local operating
environment. The internal adjustments are located on the top and sides of the unit, and are as follows:
May 29, 2012 Rev: 5.00 Page 2-2
ENG-FORM: 805-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
Switch
Function
TAPE
Right
TAPE
Left
AUX2
AUX1
ADF2
ADF1
NAV2
NAV1.
Switch #
8765432
LEFT USER RIGHT USER
SM19 Installation and Operation Manual
2.5.1 Top Panel Adjustments
2.5.1.1 Receive Selection Switches
AMS42: The receive selection switches for the navaids are two banks of rocker
switches accessible through the top cover. The right side of the controller
responds to the switches labeled RIGHT USER RX and the left side
responds to the switches labeled LEFT USER RX. Each switch can be
individually selected or deselected by toggling the position of the switch.
To select ‘on’, press the switch downwards at the end nearest the front of
the unit (n umbered 1 - 8), and to select ‘off’, press downwards at the end
nearest the back of the unit (marked OPEN.) When viewed from the front
of the unit, the switches toggle the navaids on or off from left to right as
follows:
O P E N
1
Note: These inputs are normally selected OFF (OPEN) when the unit is
shipped from the factory.
AMS44: The receive selection switches are two pairs of rocker switches accessible
through the top cover. The right side of the controller responds to the
switches labeled RIGHT USER RX and the left side responds to the
switches labeled LEFT USER RX. TAPE R/L position is selected on or off
by these switches. Each switch can be individually selected or deselected
by toggling the position of the switch between on (pressed downwards at
the end nearest the front of the unit) and off (pressed downwards at the
end nearest the back of the unit.)
RX RX
TAPE Right TAPE Left TAPE Right TAPE Left
May 29, 2012 Rev: 5.00 Page 2-3
ENG-FORM: 805-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
o
o
o
o o o
Coupled to
Left User
Coupled to
Right User
Coupled to
Right User
Coupled to
Left User
o o o
Coupled to
Left User
Coupled to
Right User
SM19 Installation and Operation Manual
2.5.1.2 DIR AUDIO Inputs
These are coupled directly to either the Right User (P) or Left User (C) of the controller
by jumpers accessible through the top cover and labeled DIR AUDIO #1 or DIR AUDIO
#2. The factory setting is for coupling to the Right User.
C
P C
P
Couplings for DIR AUDIO #1 Couplings for DIR AUDIO #2
2.5.1.3 Intercom Isolation (ICS ISO)
The front panel mode switch can be used to isolate either the left (copilot) or right (pilot)
user by using the jumper labeled ICS ISO, which is accessible through the top cover. It is
normally set for isolation of the rig ht user when the uni t i s shi pped fro m the factory.
C P
2.5.2 Right Side Adjustments
2.5.2.1 Sidetone (LEFT USER S/T and RIGHT USER S/T)
The Left User and Right User transmit sidetone (S/T) can be adjusted using the pots
accessible through the right side of the case. Rotating the pots clockwise increases the
sidetone, and counterclockwise reduces it.
2.5.2.2 ICS TIE LEVEL
This factory-preset pot may be covered by an adhesive disc to prevent field adjustment.
Under normal operation this pot does not need to be adjusted. Any adjustment
should be carried out by qualified personnel only!
May 29, 2012 Rev: 5.00 Page 2-4
ENG-FORM: 805-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
Switch Positions
Selection Examples
R MIC PAX
R MIC
Right User
selected
PAX
Left User
selected
SM19 Installation and Operation Manual
2.5.2.3 ICS GAIN LEVEL
This factory preset pot may be covered by an adhesive disc to prevent field adjustment.
Under normal operation this pot does not need to be adjusted. Any adjustment
should be carried out by qualified personnel only!
2.5.2.4 Rear Hand Mic (R MIC) and Passenger Headphones (PAX)
2.5.2.5 Rear Hand Mic (R MIC)
The R MIC rocker switch programs the Rear Hand Mic for functioning through the left or
right TX selector switch. The position of the switch can be toggled between Left User
(pressed downwards at the OUTBOARD end), or Right User (pressed downwards at the
INBOARD end.) It is factory pre-set to select the Left user.
Note: The TX annunciator will not light when the hand mic is used.
2.5.2.6 Passenger Headphones ( PAX)
The PAX rocker switch programs the passenger headphones to the headphone audio
selected by either the Left User or the Right User. The position of the switch can be
toggled between Left User (pressed downwards at the OUTBOARD end, or Right User
(pressed downwards at the INBOARD end.) It is factory pre-set to select the Left user.
2.5.2.7 DIR #1 AUDIO LEVEL
The DIR #1 AUDIO LEVEL can be adjusted using the pot accessible through the right
side of the case. Rotating the pot clockwise increases the sidetone, and
counterclockwise reduces it.
2.5.3 Left Side Adjustments
A red LED can be seen through the aperture marked POWER ON. This illuminates to
indicate that the power supply is connected to the unit.
May 29, 2012 Rev: 5.00 Page 2-5
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CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
2.5.4 Post-Installation Checks
With the controller disconnected from its mating connector, check P101 pin <17> for
+28 Vdc relative to ground, and check P101 pin <34> for continuity to ground (below 0.5
:). Check P102 pin <19> for the presence of the lamp dimmer voltage. Check all mic,
phone, music, and key lines for shorts to ground or adjacent pins. Check all key lines
for correct operation. Do not attach the audio controller until these conditions are
met.
Power up the aircraft's system with the unit installed and turn on the radios and
accessories required for the system. Refer to Section 3.0 for operation and set-up
information.
Start with only the pilot's headset installed. Check for correct ICS, radio, and transmit
operation. Do not proceed until the radios are functioning correctly. The S/T (sidetone)
adjustment accessible through the right side of the controller and the transceiver
internal adjustment may have to be adjusted for correct balance for the pilot and copilot.
Adjustment of the individual radio RX levels should be set first, and then the front panel
RX master volume control.
Unusual buzzes, hums or other background audio are symptomatic of mu ltiple grounds
or noisy external systems sharing the same wire bundle. Note that incorrect jack wiring
is a common fault, especially for passenger stations, and may cause loss of audio, a
tone on the headset lines, or other problems. Failure to key or correctly modulate a
transceiver may be caused by missing grounds on the radio or audio controller.
Plug in the hand mic and test for correct operation. Note that wiring faults for this
accessory may cause peculiar loss of ICS or TX functions because it has over-riding
priority in the system.
Plug in the remaining headsets and check for proper operation.
Note: an incorrect drop cord or improper jack wiring may cause a wide range of
problems from loss of audio to a tone heard in the headset.
Check levels and operation of all functions in flight to ensure proper adjustments and
settings have been made.
2.5.5 Accessories Required But Not Supplied
Installation kit AA90-IKC (Alt. part No. D50S37SL-IKC) is required to complete the
installation. The kit cons ists of 1 50-Pin D -min Fema le Crimp Kit (D50S L -IKC) and 1
37-Pin D-min Female Crimp Kit (D37SL-IKC).
May 29, 2012 Rev: 5.00 Page 2-6
ENG-FORM: 805-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
DRAWING
REV.
DESCRIPTION
TYPE
AMS42
AMS42\403-0
1.11
AMS42 Dual Channel Audio Controller
Interconnect
AMS42\403-1
1.11
AMS42 Dual Channel Audio Controller
Interconnect
AMS42\403-2
1.11
AMS42 Dual Channel Audio Controller
Interconnect
AMS42\405-0
1.01
AMS42 Dual Channel Audio Controller
Connector Map
AMS42\905-0
2.00
AMS42 Dual Channel Audio Controller
Faceplate
AMS42\922-0
1.10
AMS42 Dual Channel Audio Controller
Mech. Installation
AMS44
AMS44\403-0
1.03
AMS44 Dual Channel Audio Controller
Interconnect
AMS44\403-1
1.03
AMS44 Dual Channel Audio Controller
Interconnect
AMS44\403-2
1.03
AMS44 Dual Channel Audio Controller
Interconnect
AMS44\405-0
1.02
AMS44 Dual Channel Audio Controller
Connector Map
AMS44\905-0
2.00
AMS42 Dual Channel Audio Controller
Faceplate
AMS44\922-0
1.10
AMS Series Dual Channel Audio Controller
Mech. Installation
SM19 Installation and Operation Manual
D50SL-IKC consists of
Quantity Description AEM Part #
1 D-min 50 Socket Housing 20-21-050
50 MS Crimp Socket 20-26-901
1* Jack Screw Set 20-27-002
1* Lock Clip Set 20-27-004
1 50 Pin Connector Hood 20-29-051
D37SL-IKC consists of
Quantity Description AEM Part #
1 D-min 37 Socket Housing 20-21-037
37 MS Crimp Socket 20-26-901
1* Jack Screw Set 20-27-002
1* Lock Clip Set 20-27-004
1 37 Pin Connector Hood 20-29-038
* Use as required.
2.6 Installation Drawings
Section 2.0 ends following above documents
May 29, 2012 Rev: 5.00 Page 2-7
ENG-FORM: 805-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
2.00
RAS #19 - CHANGED TO AEM LOGO, UPDATED HOLE SCHEDULE.
VOX
RX-ON
RX-ON
VOX
RX-ON
RX-ON
Nov 10/11
RDB
AMS42
AMS42
ICS VOL
ICS VOL
COM
COM
1
1
COM FM1
2
2
TX
TX
FM1COM
FM2
FM2
AUX
AUX
PAPA
KEYED
KEYED
ISO
ISO
NORM
NORM
COM
COM2COM
1
1
LIVE
LIVE
AUX
AUX
PA
PA
COM
2
FM1 FM2
TX
TX
FM2FM1
ICS VOL
ICS VOL
Nov 16/11
21 Nov 11
Confidential and Proprietary to NAT
KELOWNA BC CANADA
(250)-763-1088
WWW.AEM-CORP.COM
DUAL CHANNEL AUDIO CONTROLLER
SIZE
A
L9015
1:1 1 of 3
905-0
AMS42
SHEET
REV
2.00
Tony Pearson
Designer
May 28, 2012
82
1.55 [39.4]
Reviewed/Approved
RAS#
6.82 [173.2]
Tony Pearson
Designer
Mar 7, 2011
8.54 [216.9]
2.00
RAS #38 - CHANGED TO AEM LOGO, UPDATED FORMAT.
17-Jan-12 MWS
AMS44
AMS44
ICS VOL
ICS VOL
OFF
OFF
NAV1
NAV1
NAV2
NAV2
COM2COM1
COM2COM1
TX
TX
ADF
ADF
FM1
FM1
DME
DME
MKR
MKR
AUXFM2
AUXFM2
FM FMFM FM
PTT
PTT
PA
PA
EMER
EMER
ISO
ISO
NORM
NORM
LIVE
LIVE
OPER
OPER
NAV1
NAV1
AUX
AUX
PA
PA
NAV2
NAV2
COM1
COM1
ADF
ADF
COM2
COM2
TX
TX
DME
DME
FM1
FM1
MKR
MKR
FM2
FM2
OFF
OFF
ICS VOL
ICS VOL
Jan 17/12
17 Jan 12
DUAL CHANNEL AUDIO CONTROLLER
SIZE
A
L9015
1:1 1 of 3
905-0
AMS44
SHEET
KELOWNA BC CANADA
(250)-763-1088
WWW.AEM-CORP.COM
REV
2.00
6.82 [173.2]
1.55 [39.4]
Reviewed/Approved
Tony Pearson
Designer
May 29, 2012
RAS#
82
Tony Pearson
Designer
Mar 7, 2011
8.54 [216.9]
AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
Secti o n 3.0 Operation
This section is divided to provide model-specific Operational instructions.
Operation Instructions for the AMS42 can be found in Sections 3.1 to 3.6.
Operation Instructions for the AMS44 can be found in Sections 3.7 to 3.12.
3.1 AMS42 - General Operation
The AMS42 provides one central controller for all the aircraft audio, allowing selection of transmit and
receive audio, LIVE, KEYED, or VOX intercom, interf ace for an additional handheld transm it microphone
(hand mic), and pilot/copilot isolation/emergency operation. Typical definition of the unit has the ‘pilot’ on
the right side of the controller, and the ‘copilot’ and passengers on the left side. T his can be easily re-
configured at the time of installation for alternate seating arrangements.
Individual control over receive and transm it functions i s provided for both the pilot and copi lot (observer),
and a common control is provided for LIVE, KEYED and VOX ICS operation. An additional contro l is
provided for NORMAL, EMERGENCY, or ISOLATE (pilot cut off from ICS audio) operation.
Sidetone (S/T) level is adjustable i nternally, and Receive (RX) and Intercom (ICS) levels are adjustable
on the front panel. All audio, except the S/T of the radio in use and any Type ‘B’ DIRECT AUDIO input
signals, are muted during transmit for clarity. ICS operation allows transmit during any ICS mode by
using the PTT switch.
3.2 AMS42 - Audio Alerting Functions
No internal audio alerting is provid ed in the AMS 42. Two d irect (unswitche d) inpu ts are provide d to a llow
airframe alerting signals to be routed to the pilot. See Section 3.4.5 (Auxiliary Inputs) for more
information.
DIR AUD #1 is amplif ied by the Audio controll er, and can not be heard when the Mode Switch is in the
EMER position. DIR AUD #2 is not amplified, and is audible at all times.
May 29, 2012 Rev: 5.00 Page 3-1
ENG-FORM: 806-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
Left User (Co-pilot)
Transmit Selector
Transmit
Annunciator
Right User (Pilot)
Transmit Selector
Transmit
Annunciator
SM19 Installation and Operation Manual
3.3 AMS42 - Selection of Transmit Functions
3.3.1 Transmit Selectors
The transmit selector controls are six position rotary switches, one on each side of the panel to
correspond to the user on that side of the aircraft. T he controls select the trans mit function required by
the relevant user. Each rotary selector switch i s completely independent of the other, and the pilot and
copilot have equal priorit y during transmit. When the PTT is activated, all audio selected on the side of
the controller that is transmitting is muted, except the sidetone of the transceiver in use.
3.3.1.1 Automatic Receive Audio
Receive audio is automatically selected as a function of the respective rotary selector switch. No
additional switching is needed to establish external communication.
3.3.1.2 Transmit Annunciators
During transmit from either the pilot or copilot position, the appropri ate TX annunciator (green) will light on
the front panel.
3.3.1.3 TX Selector Example
In the figure above, the positions of the rotary selector switches indicate that the right side of the controller is
set for transm it and r eceive operat ion on t he COM 2 tra nsceiv er whi le the l eft si de of the c ontr oller is set f or
transmit and receive operation on the FM1 transceiver.
3.3.2 Hand Microphone
The hand mic functions without power and will work in emergency or equipment failure situations. The hand
mic normally functions on the left side of the controller but can be connected to the right side at the time of
installati on by changi ng an interna l switch. W hen the hand m ic or transm it PTT switch is activat ed, the mi c
involved will be coupled to the radio (or PA) selected. The TX annunciator will not light when the hand mic is
used.
May 29, 2012 Rev: 5.00 Page 3-2
ENG-FORM: 806-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
RX Switches at COM1 and FM2
TX Selector at COM2
TX Selector at FM1
RX switch at COM2
Volume Controls
(RX and ICS VOL)
SM19 Installation and Operation Manual
3.4 AMS42 - Transceiver Receive Functions
3.4.1 Receive Selection Switches
The receive audio is selected by switching any of the RX s witches (white switch bats) UP to c onnect the
indicated radio to the headphone bus. The AUX position does not have a separate RX switch and is
connected to the headphone bus by rotating the T X selector to the AUX position. See section 3.4.3. 1 for
RX volume control.
3.4.2 Transceiver Selection Examples
In the figure below, the right side TX selector is set for transmit and receive operation on COM2. T he
Receive function switches are also selected s o the right side can m onitor COM1 and FM2 transceivers.
Note that FM1 is not selected and AUX cannot be selected by the RX switches.
In the figure below, the ri ght side configuratio n remains the same. T he left side is set up to receive and
transmit on FM1 while m onitoring the COM2 transceiver. Note that COM1 and FM2 are not selecte d on
the left side.
May 29, 2012 Rev: 5.00 Page 3-3
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CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
3.4.3 Volume Controls
The controller features individual master RX and ICS VOL controls on both the left and
right sides of the unit, which can be adjusted to suit the specific user's requirements.
3.4.3.1 RX Volume Control
The RX knobs are the smalle r, topmost controls of the dual concentric volume control assemblies. The
RX VOL controls provide a djustment of the RX aud io selected b y the controller. As in a ny audio s ystem,
it is important to set the individual radio volume controls to a nominal level that is acceptable to both
pilots, and then adjust the respective master RX VOL on t he aud io contro ll er to s u it user pref erence . The
RX VOL controls are designed to provide a minimum level, even when set fully ccw.
All receive audio is muted during transmit (NORM and ISO mode).
3.4.3.2 ICS Volume Control
The ICS VOL knobs are the larger, bottom controls of the dual concentric volume control assem blies.
The ICS VOL controls provide adjustment of the ICS audio selected by the controller. The ICS volum e
controls provide adjustment from 0 to full output. See also section 3.5.
3.4.4 Passenger Receive Audio Selection
The passengers normally hear the radio audio as selected on the left side of the controller. The passengers
can be shifted to the right side by changing the setting of the internal PAX switch, accessible through the
right side of the co ntr ol l er . The passengers will n ot h ear any radio audio whe n th e r ed mode switch is in the
EMER position.
3.4.5 Auxiliary Inputs
Two Direct Audio inputs are available. They are coupled directly to either the left or right side of the
controller at the time of inst allation. T he Direct Aud io inputs are n ormally select ed for the rig ht side of the
controll e r when the unit is sh ip pe d fro m t h e fa ct o ry .
3.5 AMS42 - Intercom Functions
All ICS audio is controlled b y the front panel ICS volum e controls and may be varied to suit conditions.
There are independent volum e controls for the left and right sides of the controll er. The ICS VOL is the
larger, aft controls of the dual concentric volume control assemblies. See section 3.4.3.2.
If the controller is operated in the emergency mode, ICS operation will continue (if there is no fault
condition) between the passengers, but not between the pilot and copilot or passengers.
May 29, 2012 Rev: 5.00 Page 3-4
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CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
ICS Mode Control
SM19 Installation and Operation Manual
3.5.1 ICS Modes of Operation
Intercom system (ICS) audio m ay be implemented in three modes between user s; LIVE (on constantly),
VOX (voice activated), or KEYED (active only when switched by ICS PTT switch). The ICS mode is
selected by the ICS Mode control (see below). It is common to use the LI VE mode during ground
operations, start-up, etc. and to use VOX or KEYED operation if conditions are so noisy that ‘pilot fatigue’
will result.
ICS mode selection is made by positioning the ICS Mode control for the d esired ope ration.
KEYED ICS (PTT Operation)*
ICS Mode Control set fully counter-clockwise into the switch detent.
LIVE (Hot Mic Operation)
ICS Mode Control set fully clockwise.
VOX (Voice Activated)
ICS Mode Control set fully clockwise, then slowly rotated counter-clockwise until the intercom just
becomes ‘quiet’. This setting will vary with ambient noise conditions, and the quality and number
of microphones connected in the system.
* KEYED operation is inherent to the pilot and copilot microphone circuits only.
3.5.2 Passenger ICS Operation
Passenger ICS audio is LIVE when the controll er is in the LIVE or KEYED mode of ICS operation and are
VOX triggered when a VOX setting is selected. Note that the passengers are always LIVE unless
interrupted by an in-line PTT cord, or the controller is set for VOX opera tion.
Passenger and copilot (observer) operations can be maximized by using PTT type cord assemblies
designed for use with AEM audio controllers.
CAUTION: Ensure that all PTT type cord assemblies have properly shielded m ic and phone wiring, or
‘crosstalk’ will occur.
May 29, 2012 Rev: 5.00 Page 3-5
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CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
Mode Control Switch
SM19 Installation and Operation Manual
3.6 AMS42 - Mode Control
The Mode Control switch i s a three-position, locking toggle switch that is used to select between ISO,
EMER OPER, and NORM. It is identified with a red cap.
3.6.1 Emergency Operation
The center (EMER OPER) position of the mode switch places the controller into the emergenc y operation
mode. When s witc h ed to t he EMER OPER pos iti on, b oth p ilo t an d co pil ot c ontr o ls a re rem o ved f rom the ICS
bus and co nnected directly to the ir respective radios. Thi s mode should b e selected i n th e event of a box fault
or power failure.
The Emergency function s hould be tested prior to flight to ass ure proper operation and allow the radio
levels to be set adequately for emergency operation.
3.6.1.1 Emergency Mode Effects
In the EMER mode, all fu nctions are retained b y the pilot and copilot, exc ept ICS and possibl y boom mic
operation. If the box or airframe fault prevents the TX annunciator from lighting during tran smit (indicating
a failure in the mic keying circuit), then the hand mic should be used. A power fault of any kind will
prevent the TX annunciator from lighting, g iving an immediate indication of failure. If ICS aud io is still
available, then the power to the controller has not failed and loss of the TX light indicates TX switch
failure.
Note that in the EMER mode, all switches work exactly as they do during NORM operation, except for the RX and
ICS volume controls which will have no effect. Any selected receive audio is switched to the appropriate user in the
‘emergency’ mode (red mode switch in the EMER position), but not to any passengers in the system. Level will be
lower than NORM operation because the signals are obtained directly from the radios, bypassing the electronics in
the controller. This is provided for failure situations which make operation impossible in the NORM mode (i.e., loss
of power or amplifier failure, etc.)
3.6.2 Isolation Operation
The mode switch can select an ISO function, which prevents the selected user from receiving ICS audio. This
is useful when passengers are interfering with critical flight operations (landing, etc.). It can be preselected at
installation to isolate the left or right side. Intercom operation for the passengers and copilot is not affected. It
is normally set for isola tion of the ri ght side whe n the unit is shipped from the fa ctory.
May 29, 2012 Rev: 5.00 Page 3-6
ENG-FORM: 806-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
3.7 AMS44 - General Operation
The AMS44 provides one central controller for all the aircraft audio, allowing selection of transmit and
receive audio, LIVE, PTT (Keyed), or VOX intercom, interface for an additional handheld transmit
microphone (hand mic), and pilot /copilot iso lation/ emer gency operati on. T ypical definition of the unit h as
the ‘pilot’ on the right side of the controller, and the ‘copilot’ and passengers on the left side. This can be
easily re-configured at the time of installation for alternate seating arrangements.
Individual control over receive and transmit functions are provided for both the pilot and copilot
(observer), and a common control is provided for LIVE, PTT and VOX ICS operation. An additional
control is provided for NORMAL, EMERGENCY, or ISOLATE (pilot cut off from ICS audio) operation.
Sidetone (S/T) level is adjustable i nternally, and Receive (RX) and Intercom (ICS) levels are adjustable
on the front panel. All audio, except the S/T of the radio IN USE and any Type ‘B’ DIRECT AUDIO input
signals, are muted during trans mit for clarity. ICS operation allows trans mit during any ICS mode by using
the PTT switch.
3.8 AMS44 - Audio Alerting Functions
No internal audio alerting is provid ed in the AMS 44. Two d irect (unswitche d) inpu ts are provided to allo w
airframe alerting signals to be routed to the pilot. See 3.10.5 (Auxiliary Inputs) for more information.
DIR AUD #1 is amplified by the Audio controller, and can not be heard when t he Mode Switch is in the
EMER position. DIR AUD #2 is not amplified, and is audible at all times.
May 29, 2012 Rev: 5.00 Page 3-7
ENG-FORM: 806-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
Left User (Co-pilot)
Transmit Selector
Transmit
Annunciator
Right User (Pilot)
Transmit Selector
Transmit
Annunciator
SM19 Installation and Operation Manual
3.9 AMS44 - Selection of Transmit Functions
3.9.1 Transmit Selectors
The transmit selector controls are six position rotary switches, one on each side of the panel to
correspond to the user on that side of the aircraf t. The controls select the tr ansmit function required by
the relevant user. Each rotary selector switch is completely indepe ndent of the other, and the p ilot and
copilot have equal priorit y during transmit. When the PTT i s activated, all audio selected on the side of
the controller that is transmitting is muted, except the sidetone of the transceiver in use.
3.9.1.1 Automatic Receive Audio
Receive audio is automatically selected as a function of the respective rotary selector switch. No
additional switching is needed to establish external communication.
3.9.1.2 Transmit Annunciator
During transmit from either the pilot or copilot position, the appropri ate T X annunci ator (green) will li ght on
the front panel.
May 29, 2012 Rev: 5.00 Page 3-8
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CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
Both Transmit Selectors at AUX FM
SM19 Installation and Operation Manual
3.9.1.3 TX Selector Example
In the figure that follows, the positions of the rotary selector switches indicate that the left and right sides of the
controller are set for tran smit operati on on the AU X FM transceiver.
3.9.2 Hand Microphone
The hand mic functions wit hout power and will work in em ergency or equipment failure situations. T he
hand mic normally functions on the left s ide of the con troller but can be c onnected to t he right side at the
time of installation by changing an internal switch.
When the hand mic or transmit PTT switch is activated, the mic involved will be coupled to the radio (or PA)
selected. The TX annunciator will not light when the hand mic is used.
3.10 AMS44 - Transceiver Receive Functions
3.10.1 Receive Selection Switches
The Receive Audio select switches (white switch bats) are ‘center-off’ type with the ‘up’ position selecting
the respective navaid receiver audio, and the ‘down’ position selecting the respective transceiver audio.
See section 3.10.3.1 for RX volume control.
May 29, 2012 Rev: 5.00 Page 3-9
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CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
Transmit Selector at AUX FM
Receive Switches at
Navaids NAV1 and DME
Receive Switches
monitor COM1 and FM2
Transmit Selector at COM2
Receive Switches
monitor COM1 and FM2
Receive Switch
at Navaid MKR
Volume Controls
(RX and ICS VOL)
SM19 Installation and Operation Manual
3.10.2 Transceiver Selection Examples
In the figure below, the right TX selector is set for transmit and receive operation on the AU X FM . The
Receive function switches are also se lected so t he ri g ht s ide can monitor COM1 and FM2 transceivers as
well as NAV1 and DME navaids. Note that PA, COM2, FM1, NAV2, ADF, and MKR are not selected.
In the figure below, the right si de configuration remains the same. The left side is set up to receive and
transmit on COM2 while monitorin g COM1 and FM2 transceivers as well as the MKR navaid. Note that
FM1, AUX FM, PA, NAV1, NAV2, ADF and DME are not selected on the left side.
3.10.3 Volume Controls
The controller features individua l master RX and ICS VOL controls on both t he left and r ight sides of the
unit, which can be adjusted to suit the specific user's requirements.
May 29, 2012 Rev: 5.00 Page 3-10
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CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
3.10.3.1 RX Volume Control
The RX knobs are the smalle r, topmost controls of the dual concentric volume control assemblies. The
RX VOL controls provide adjustment of the RX audio selected by the controller from 10% to full. As in
any audio system, it is important to set the individual radio volume controls to a nominal level that is
acceptable to both pilots, and then adjust the respective master RX VOL on the audio controller to suit
user preference. The RX VOL controls are designed to provide a minimum level, even when set fully ccw.
All receive audio is muted during transmit (NORM and ISO mode).
3.10.3.2 ICS Volume Control
The ICS VOL knobs are the larger, bottom controls of the dual concentric volume control assem blies.
The ICS VOL controls provide adjustment of the ICS audio selected by the controller. The ICS volum e
controls provide adjustment from 0 to full output. See also section 3.11.
3.10.4 Passenger Receive Audio Selection
The passengers normally hear the radio audio as selected on the left side of the controller. The passengers
can be shifted to the right side by changing the setting of the internal PAX switch, accessible through the
right side of the co ntr ol l er . T he pas s en ger s wi ll n ot h ea r an y rad io audio when the red mode switch is in the
EMER position.
3.10.5 Auxiliary Inputs
Two Direct Audio inputs are available. They are coupled directly to either the left or right side of the
controller at the time of inst allation. T he Direct Aud io inputs are n ormally select ed f or the right side of the
controller when the unit is shipped from the factory.
3.11 AMS44 - Intercom Functions
All ICS audio is controlled b y the front panel ICS volume controls and may be varied to suit conditions.
There are independent volum e controls for the left and right sides of the controller. The ICS VOL is the
larger, aft controls of the dual concentric volume control assemblies. See also section 3.10.3.2.
If the con troller is oper ated in the em ergency mod e, ICS operatio n will continu e (if there is no fault condi tion)
between the passengers, but no t betw een the pilot and copilot or passenger s.
May 29, 2012 Rev: 5.00 Page 3-11
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CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
ICS Mode Control
SM19 Installation and Operation Manual
3.11.1 ICS Modes of Operation
Intercom s ystem (ICS) au dio may be implemented in three modes between users; LIVE (on constantly),
VOX (voice activat ed), or PTT (active o nly when s witche d by ICS PT T switch). The ICS m ode is se lected
by the control ( labeled ICS) in the m iddle of the top s witch r ow. It is com m on to use th e LIVE mode dur ing
ground operations, start-up, etc. and to use VOX or PTT operation if conditions are so noisy that ‘pilot
fatigue’ will result.
The desired ICS mode is selected by the ICS mode control knob.
PTT ICS (KEYED Operation)*
ICS Mode Control set fully counter-clockwise into the switch detent.
LIVE (Hot Mic Operation)
ICS Mode Control set fully clockwise.
VOX (Voice Activated)
ICS Mode Control set fully clockwise, then slowly rotated counter-clockwise until the intercom just
becomes ‘quiet’. This setting will vary with ambient noise conditions, and the quality and number of
microphones connected in the system.
* KEYED operation is inherent to the pilot and copilot microphone circuits only.
3.11.2 Passenger ICS Operation
Passenger ICS audio is LIVE when the controll er is in the LIVE or PTT mode o f ICS operation and are
VOX triggered when a VOX setting is selected. Note that the passengers are always LIVE unless
interrupted by an in-line PTT cord, or the controller is set for VOX opera tion.
Passenger and copilot (observer) operations can be maximized by using PTT type cord assemblies
designed for use with AEM audio controllers.
CAUTION: Ensure that all PTT type cord assemblies have properly shielded mic and phone wiring, or
‘crosstalk’ will occur.
May 29, 2012 Rev: 5.00 Page 3-12
ENG-FORM: 806-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
Mode Control Switch
SM19 Installation and Operation Manual
3.12 AMS44 - Mode Control
The Mode Control switch i s a three-position, locking toggle switch that is used to select between ISO,
EMER OPER, and NORM. It is identified with a red cap.
3.12.1 Emergency Operation
The center (EMER OPER) position of the mode switch places the controller into the emergenc y operation
mode. When s witc h ed to t he EMER OPER pos iti on, b oth p ilo t an d co pil ot c ontr o ls a re rem o ved f rom the ICS
bus and co nnected directly to the ir respective radios. Thi s mode should be selected in th e e v en t of a box fault
or power failure.
The Emergency function s hould be tested prior to flight to assure proper opera tion and allow the radio
levels to be set adequately for emergency operation.
3.12.1.1 Emergency Mode Effects
In the EMER mode, all fu nctions are retained b y the pilot and copilot, exc ept ICS and possibl y boom mic
operation. If the box or airframe fault prevents the TX annunciator from light in g d ur ing tr a ns mit (indicating
a failure in the mic keying circuit), then the hand mic should be used. A power fault of any kind will
prevent the TX annunciator from lighting, g iving an immediate indication of failure. If ICS audio is still
available, then the power to the controller has not failed and loss of the TX light indicates TX switch
failure.
Note that in the EMER mode, all switches work exactly as they do during NORM operation, except for the RX and
ICS volume controls which will have no effect.
Any selected receive audio is switched to the appropriate user in the ‘emergency’ mode (red mode switch in the
EMER position), but not to any passengers in the system. Level will be lower than NORM operation because the
signals are obtained directly from the radios, bypassing the electronics in the controller. This is provided for failure
situations which make operation impossible in the NORM mode (i.e., loss of power or amplifier failure, etc.)
May 29, 2012 Rev: 5.00 Page 3-13
ENG-FORM: 806-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
3.12.2 Isolation Operation
The mode switch can select an ISO function, which prevents the selected user from receiving ICS audio. This
is useful when passengers are interfering with critical flight operations (landing, etc.). It can be preselected at
installation to isolate the left or right side. Intercom operation for the passengers and copilot is not affected. It
is normally set for isola tion of the ri ght side whe n the unit is shipped from the fa ctory.
End of Section 3.0
May 29, 2012 Rev: 5.00 Page 3-14
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CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRON ICS MANUFACTURING CORP.
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