AEM SM19 User manual

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: [e-mail]
Toll Free: 1-888-763-1088
Phone: [phone]
Fax: [phone]
www.aem-corp.com

CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
INSTALLATION AND OPERATION MANUAL
REV 5.00 May 29, 2012
Anodyne Electronics Manufacturing Corp.
15-1925 Kirschner Road
Kelowna, BC, Canada.
V1Y 4N7
Telephone [phone]
Facsimile [phone]
Website: www.aem-corp.com
© 2012 Anodyne Electronics Manufacturing Corp. (AEM),
All Rights Reserved
SM19
AMS42/AMS44 Series
Dual Channel Audio Controllers

AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
Installation and Operation Manual Page ii
ENG-FORM: 820-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
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.

AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
Installation and Operation Manual Page iii
ENG-FORM: 820-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
Prepared By:
Checked By:
Approved By:
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
Section
Revision Number
Revision Description
Date
All
Rev: 5.00
Updated drawings and template
May 29, 2012
Tony Pearson
Designer
May 29, 2012
Loen Clement
Designer
Jun 11/12
Tom Betzelt
Product Support
Manager
June 11, 2012

AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
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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

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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

AMS42/AMS44 Dual Channel Audio Controller
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May 29, 2012 Rev: 5.00 Page 1-1
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CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
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.

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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.

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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 150Ωmin.
(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
1.6kΩinput 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

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1.4.3 Environmental Specifications
Temperature: -20qC. to +55qC (ambient)
-55qC. to + 85qC (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

AMS42/AMS44 Dual Channel Audio Controller
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May 29, 2012 Rev: 5.00 Page 2-1
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CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
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 carefully. Inspect the unit visually 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 Manufacturing 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 Í
Í
IMPORTANT!
Do not bundle any lines from this unit with transmitter coax lines. Do not bundle any lines from
this unit with 400 Hz synchro wiring, or AC power lines. Failure to observe these limitations may
result in incorrect or intermittent operation, or severe audio interference on received and transmitted
signals.

AMS42/AMS44 Dual Channel Audio Controller
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2.4.2 Cautions
In all installations, use shielded cable exactly as shown and ground as indicated. Significant problems
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 ground
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 circuit breaker, may lead to damage 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, Paragraphs
11-85, 11-86, and listed in Table 11-11. For shielded wire applications, use Tefzel MIL-C-27500 shielded
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 "clamshell" hood, and is installed after the wiring is complete. Aircraft
harnessing should permit the unit to be lowered from the panel for easy access to all side adjustments.
Do NOT mount the unit until all adjustments have been carried out.
All wiring should be at least 24 AWG, except power and ground lines, which should 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 similar loads. Power
to this unit must be supplied from a separate breaker (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 functional tests and trimpot adjustments. Be sure the harness 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 unit is securely fastened to the panel before any flight is
attempted.
2.5 Adjustments and Connections
The unit ships from the factory with all internal adjustments 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:

AMS42/AMS44 Dual Channel Audio Controller
SM19 Installation and Operation Manual
May 29, 2012 Rev: 5.00 Page 2-3
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CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
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 (numbered 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
Switch
Function
TAPE
Right
TAPE
Left
AUX2
AUX1
ADF2
ADF1
NAV2
NAV1.
Switch #
8
7
6
5
4
3
2
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.)
TAPE Right TAPE Left TAPE Right TAPE Left
LEFT USER RIGHT USER
RX RX

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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 right user when the unit is shipped from the factory.
CP
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!
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

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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)
Switch Positions
Selection Examples
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.
R MIC PAX
ll
R MIC
Right User
selected
PAX
Left User
selected

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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 multiple 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 consists of 1 50-Pin D-min Female Crimp Kit (D50SL-IKC) and 1
37-Pin D-min Female Crimp Kit (D37SL-IKC).

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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
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
Section 2.0 ends following above documents