Audio international ASP-101-02 Series User manual

7300 Industry Drive, North Little Rock, AR 72117
Phone: [phone] Fax: [phone]
www.audiointl.com
Installation and Operation
Manual
ASP-101-02-x
Surround Sound Processor
Document # 540183

Audio International, Inc. ASP-101-02-x Installation & Operation
Document #540183, Rev IR, 6/2000 Page 1of 14
Document Revision History
Rev. Level Date Description
IR 6/2000 Initial Release
Reference Documents
Document # Description
522305 Rev IR ASP-101-02-x Outline Drawing
320626 Rev IR ASP-101-02-x Mechanical Drawing
Service Bulletin List
Service
Bulletin # Subject Manual Revision Revision Date
Table of Illustrations
Illustration # Description Page #
2.3 Typical System Block Diagram 5
7.0 Reference Drawings 14
PROPRIETARY INFORMATION NOTICE: Despite any other copyright notice, this document and
information disclosed herein contains confidential, proprietary designs owned by Audio
International, Inc. Neither this document nor the data contained herein shall be reproduced, used,
or disclosed to anyone without the written authorization of Audio International, Inc.

Audio International, Inc. ASP-101-02-x Installation & Operation
Document #540183, Rev IR, 6/2000 Page 2of 14
Table of Contents
Section Description Page
1.0 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Purpose of the Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Operational Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.0 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Typical Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3 Typical System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4 Multiple Unit Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.5 Data Bus Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 Prior to Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.3 Cautions &Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 Wiring Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.5 Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.6 Mating Connector Information . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.7 Pinout Assignments and Descriptions. . . . . . . . . . . . . . . . . . . . 10
3.8 Post-Installation Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.0 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1 Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Source Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.0 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1 General Troubleshooting Procedures . . . . . . . . . . . .. . . . . . . . 11
5.2 Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.0 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.0 Reference Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Audio International, Inc. ASP-101-02-x Installation & Operation
Document #540183, Rev IR, 6/2000 Page 3of 14
ASP-101-02-x
Surround Sound Processor
1.0 General Information
1.1 Introduction
This manual contains information for the proper application, installation,
and operation of the Audio International, Inc. (AI), Surround Sound
Processor, Model # ASP-101-02-x. The “-x” suffix in the model number
designates the type of connector utilized. Also included are relative
physical and electrical characteristics of the unit.
1.2 Purpose of the Equipment
The Surround Sound Processor has been specifically designed to meet
the special requirements of aircraft use. The unit is comprised of four
functional modules; audio control, cabin audio surround processor, digital
to analog audio conversion, and FiberLinkinterface.
The ASP-101-02-x accepts audio inputs from the entertainment source
equipment. Using commands issued from switch panels, LCD touch
screens or electroluminescent touch screen panels, the unit distributes the
audio to cabin speakers.

Audio International, Inc. ASP-101-02-x Installation & Operation
Document #540183, Rev IR, 6/2000 Page 4of 14
1.3 Operational Features
q Allows multiple source audio inputs to be selected and routed
independently to multiple audio devices.
q FiberLinkcabin audio output.
q Integrated cabin audio surround sound processor.
q 4 digital audio source inputs to integrated surround sound processor.
q 1 analog audio input to integrated surround sound processor.
q 1 digital audio to analog audio converter.
q Control, configuration, and interface with other components via Audio
International’s proprietary RS-485 serial data bus.
q 3 binary unit ID pin inputs identify each module on the data bus in a
multi-unit configuration (up to 8 units total on the same AI proprietary
RS-485 data bus).
q Separate PA audio and PA key inputs provide for entertainment audio
override capability when activated for both the integrated cabin audio
surround sound processor and the integrated 16 x 16 internal audio
multiplexer.
q Power-up defaults are software configurable for each audio output.
q Lightweight, rugged aircraft design.
2.0 Application
2.1 Introduction
The ASP-101-02-x is part of a complete cabin audio entertainment
system. The application of the unit is specific to a particular aircraft based
upon the desires of the customer or designer.
2.2 Typical Application
The unit provides a switching matrix for cabin entertainment systems
utilizing multiple source audio inputs and outputs. Since it resides on AI’s
proprietary RS-485 data bus, any switch or control device can
independently select from amongst the input sources. A dedicated
FiberLinkcabin audio output is provided via the integrated cabin audio
surround sound processor.

Audio International, Inc. ASP-101-02-x Installation & Operation
Document #540183, Rev IR, 6/2000 Page 5of 14
2.3 Typical System Block Diagram
2.4 Multiple Unit Configurations
There is ONLY one (1) audio source input and output possible on each
ASP-101-02-x. If more than one (1) audio input or output is needed,
multiple-unit configurations are possible via AI’s proprietary RS-485 serial
data bus. This allows selection of any audio source from any location
provided the proper audio source inputs are correctly routed to each
ASP-101-02-x unit as needed. The number of possible units in a system
is dependent on other modules used within the cabin audio system, up to
eight (8) can be used on the same AI proprietary RS-485 data bus
segment.
2.5 Data Bus Control
There are no controls on the ASP-101-02-x. Switching control of the unit
is handled by commands sent via AI’s proprietary RS-485 serial data bus.
Some features are set upon installation using an external PC (typically a
laptop) and an MSM2912-01-x, RS-232 / RS-485 Converter Module. A
software program designed by Audio International specifically for this task
sets the power-up state for each audio output, trim levels for each audio
input source, and cabin audio Surround Sound Processor and FiberLink
network specifications.
RS485
DATA BUS
INTERFACE
DIGITAL
CABIN
AUDIO
OUTPUT
FIBERLINK
INTERFACE
AUDIO
SURROUND
SOUND
PROCESSOR
INPUT LEVEL
CONTROL
4-INPUT
DIGITAL AUDIO
SELECTOR
BUFFER
BUFFER
BUFFER
BUFFER
DATA BUS
I/O
PA INPUT
ANALOG INPUT
FIBER OPTIC
DIGITAL AUDIO
INPUTS
OPTICAL
LOOP
OUTPUTS
TM

Audio International, Inc. ASP-101-02-x Installation & Operation
Document #540183, Rev IR, 6/2000 Page 6of 14
3.0 Installation
3.1 Prior to Installation
The ASP-101-02-x is a simple module to install. Prior to installation the
following items should be considered:
3.1.1 During the design and layout of the aircraft cabin, careful
consideration of the location of this and all other audio modules is
necessary. Some of the items to consider include:
• Space
• Proximity to other devices (i.e. source equipment)
• Available power supply
• Length of cable runs
• Environmental conditions (temperature, humidity, etc.)
• Location of other aircraft systems (i.e. oxygen delivery)
• Access for service repair (if applicable)
• Convenience for user interface (if applicable)
3.1.2 The module shall be installed to conform to the standards
designated by the customer, installing agency, or other specified
requirements.
3.1.3 Select a mounting location for the ASP-101-02-x prior to
installation. User access is NOT a consideration when placing unit
into the suitable mounting location. Refer to Section 7.0 for
dimensions and attachment points. The unit shall be bonded to the
aircraft frame with a bonding resistance of less than 0.001-ohms.
3.2 Unpacking and Inspection
3.2.1 Carefully open the packaging and remove the ASP-101-02-x.
Verify that all components have been included in the package per
the packing list. Inspect the unit for shipping damage.
3.2.2 If damage has occurred during shipping, a claim should be filed
with Audio International within 24 hours and a Return Request
Authorization Number shall be obtained from AI. Refer to the front
cover of this manual for address and telephone number of Audio
International, Inc. Repackage the unit in its original packaging
materials and return it to AI following instructions given by the AI
representative. If no return is necessary, retain the packing list and
the packing materials for storage.

Audio International, Inc. ASP-101-02-x Installation & Operation
Document #540183, Rev IR, 6/2000 Page 7of 14
3.3 Cautions & Warnings
3.3.1 All analog audio output lines from the Surround Sound Processor
unit shall be shielded and properly grounded. Analog audio input
lines shall be shielded and grounded at the source, unless
indicated otherwise. Avoid placing cables near high power wires.
3.3.2 It is important to do a pin-to-pin power and ground check on all
connectors. Ensure that power and ground are applied only where
specified. Damage to the unit can result if power or ground is
applied to the wrong points.
3.3.3 DO NOT connect or disconnect the unit while power is applied.
3.3.4 DO NOT connect or disconnect any inputs or outputs when power
is applied to the unit.
3.3.5 DO NOT remove any factory-installed screws. Damage to the unit
can result and void any warranties.
3.3.6 ESD (Electro Static Discharge) guidelines shall be followed.
3.4 Wiring Requirements
The installing agency shall supply and fabricate all external cables and
connectors. The length and routing of external cables should be carefully
studied and planned before attempting installation of the equipment. Allow
adequate space for installation of cable and connectors.
3.4.1 Digital Audio / FiberLinkLines
All digital audio / FiberLinkwiring shall be 100/140 µm
(core/cladding) multi-mode fiber optic cabling. All fiber optic
connectors/couplers shall use ceramic ferrules to minimize adverse
reflection effects. BRAND-REX P/N: OC-1011 or equivalent fiber
optic cabling shall be used for all digital audio / FiberLinkwiring.
3.4.2 Analog Audio Lines
All analog audio wiring shall be 22 AWG, MINIMUM, twisted
shielded cable unless otherwise specified. All audio input and
output lines require twisted shielded cable with the cable shields
grounded at the source. Shield continuity shall be maintained
through all production breaks.

Audio International, Inc. ASP-101-02-x Installation & Operation
Document #540183, Rev IR, 6/2000 Page 8of 14
3.4.3 Power Wires
All power and ground wires shall be 20 AWG, MINIMUM. Power
ground wires shall be grounded within twelve inches of the unit.
Protect power wires with circuit breakers or fuses located close to
the electrical power source bus.
3.4.4 AI’s Proprietary RS-485 Serial Data Bus
The ASP-101-02-x is designed to interface with other Audio
International equipment via AI’s proprietary RS-485 serial data bus.
The data bus shall be implemented using a twisted shielded pair
cable in accordance with MIL-DTL-27500 or equivalent. The wire
size for the conductors in this cable shall be 22 AWG, MINIMUM.
The shield shall be connected to a shield pin or to ground at one
end of the connection between devices. Shield terminations shall
be made as close to the connector pin as possible.
Maximum derivation distance from data bus splice connections to
actual connector of each data bus device is 24 inches in length. All
modules on AI’s proprietary RS-485 serial data bus shall be
connected in a daisy-chain configuration.
3.4.5 MIL-SPEC Requirements
All wires shall be in accordance with MIL-W-22759 or equivalent.
Twisted shielded cable shall be in accordance with MIL-DTL-27500
or equivalent.
3.4.7 Clearance and Separation Requirements
When running cables, avoid sharp bends and placing cables near
aircraft control cables. Maintain a MINIMUM clearance of three (3)
inches from any control cable. If wiring is run parallel to
combustible fluid or oxygen lines, maintain a separation of six (6)
inches between the lines.
3.5 Physical Characteristics
3.5.1 The ASP-101-02-x should be located away from heat sources,
magnetic fields, direct sunlight, and areas with excessive dust
and/or moisture. The unit shall NOT be mounted to the skin of the
aircraft.
3.5.2 Refer to Section 7.0 for unit dimensions and mounting hole sizes.

Audio International, Inc. ASP-101-02-x Installation & Operation
Document #540183, Rev IR, 6/2000 Page 9of 14
3.5.3 The unit shall be rigidly mounted to its location using the
appropriate fastening hardware supplied by the installing agency.
3.5.4 When mounting the unit to the aircraft’s frame, allow sufficient
space for mating connectors.
3.5.5 ASP-101-02-x Configuration Options
Audio
Each audio input may have the following configuration options
specified:
• Input Level adjustment from 0% to 100% of full maximum in increments of
2%
Each audio output (amplifier and headphone) may have the
following configuration options specified independently:
• Power-up volume level from 0% to 80% in increments of 10%
• Power-up bass level from 0% to 100% in increments of 25%.
• Power-up treble level from 0% to 100% in increments of 25%.
3.6 Mating Connector Information
3.6.1 ASP-101-02-x Mating Connectors
Model # Pin # Description
ASP-101-02-1 P1 RD37F10JVL0 Female Plug (Positronic)
P2-P13 Mates with ST Series Optical Cable
501380-2 AMP or Equivalent
ASP-101-02-2 P1 DCMA-37S Female Plug
M85049/48-1-4 Backshell
D20419-18 Male Screwlock
P2-P13 Mates with ST Series Optical Cable
501380-2 AMP or Equivalent
ALL CONNECTORS TO HAVE LOCK TAB SETS ON UNIT.

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3.7 Pinout Assignments and Descriptions
P1 Pinout Chart
Pin # Description Pin # Description
1 +28 VDC Input (Digital) 20 Left Analog Audio Output High
2 Ground Input 21 Left Analog Audio Output Low
3 Data Bus A 22 Left Analog Audio Output Shield
4 Data Bus B 23 Right Analog Audio Output High
5 Data Bus Shield 24 Right Analog Audio Output Low
6 Unit ID 1 25 Right Analog Audio Output Shield
7 Unit ID 2 26 Front Left Output High
8 Unit ID 4 27 Front Left Output Low
9 ID Common 28 Front Right Output High
10 PA Key Input 29 Front Right Output Low
11 PA Audio High Input 30 Rear Left Output High
12 PA Audio Low Input 31 Rear Left Output Low
13 PA Audio Shield Input 32 Rear Right Output High
14 Left Analog Audio Input High 33 Rear Right Output Low
15 Left Analog Audio Input Low 34 Woofer Output High
16 Left Analog Audio Input Shield 35 Woofer Output Low
17 Right Analog Audio Input High 36 Center Output High
18 Right Analog Audio Input Low 37 Center Output Low
19 Right Analog Audio Input Shield
Connector Functions P2 –P13
P2 Optical Input #1 P8 Optical Input #4
P3 Optical Output #1 P9 Optical Output #4
P4 Optical Input #2 P10 Optical Input (for Analog Out)
P5 Optical Output #2 P11 Optical Output
P6 Optical Input #3 P12 FiberlinkInput
P7 Optical Output #3 P13 FiberlinkOutput
3.8 Post Installation Test
3.8.1 With the aircraft power “ON”, select an audio source unit and
operate that unit to create audio signal to the ASP-101-02-x. Verify
that an audio output is present at one of the audio output locations.
Repeat this test for each audio source unit in the system. Repeat
this test for each audio output location in the system.
3.8.2 Repeat the above tests using all control units in the aircraft (switch
panels, IR Remotes, LCD touch-screen monitors, etc.)
3.8.3 Activate and speak into a microphone to verify that the PA audio
overrides the entertainment audio.

Audio International, Inc. ASP-101-02-x Installation & Operation
Document #540183, Rev IR, 6/2000 Page 11 of 14
3.8.4 All aircraft audio functions should be tested for proper operation. If
all audio functions are operational, the ASP-101-02-x has been
properly installed. Refer to Section 5.0, Troubleshooting, if
problems are encountered.
4.0 Operation
4.1 Power Up
Power to the unit is initiated when the aircraft power is turned on and
remains on at all times.
4.2 Source Switching
There are no direct controls on the unit. All functions are controlled
through commands sent via AI’s proprietary RS-485 serial data bus.
Switching audio sources from any location is accomplished through any
user device designed to give selection choice –switch panels, LCD touch
screens, remote controls, etc.
5.0 Troubleshooting
5.1 General Troubleshooting Procedures
Many problems can be isolated with the following general techniques:
• To verify power to the unit, recheck +28 VDC power is applied to
the proper pins on the unit. Use a voltmeter to verify correct level.
• To reset, remove power from the unit for at least one minute and
reapply power to verify that the problem still exists.
• Recheck all connections to the unit for security. Check all harness
runs for possible pinching. Recheck all pin outs for application
accuracy.

Audio International, Inc. ASP-101-02-x Installation & Operation
Document #540183, Rev IR, 6/2000 Page 12 of 14
5.2 Troubleshooting Chart
Problem Possible Cause Solution
Audio is not
present in
the
speakers
Audio source not selected or
activated
Unit is not properly connected
to the audio source(s)
Circuit breaker has been
tripped
There has been a power
failure while the respective
entertainment unit was
operating
Ensure an active audio
source input is present
Ensure the unit has been
properly connected to the
audio source(s)
Reset circuit breaker
Refer to the entertainment
unit operation manual to re-
activate the corresponding
unit
Problem
selecting
audio
sources
Control panel or ASP unit
improperly connected to AI’s
proprietary RS-485 serial
data bus
Device ID pins improperly
connected
Selection not responding
Check each device for
proper connections to data
bus
Verify proper device ID pin
connections on units
Verify that data bus A and B
connections are not
swapped at any device on
data bus segment

Audio International, Inc. ASP-101-02-x Installation & Operation
Document #540183, Rev IR, 6/2000 Page 13 of 14
6.0 Specifications
Physical Specifications
Housing Black Brushed Aluminum
Dimensions
(l x w x h) 9.4" x 10.5" x 2.4" 23.88 cm x 26.67 cm x 5.08 cm
Weight 2.5 lbs / 1.13 kg
Power Requirement Specifications
P7 (Entertainment) Amp Maximum @ +28 VDC
Amp Nominal @ +28 VDC
P10 (Digital) Amp Maximum @ +28 VDC
Amp Nominal @ +28 VDC
Operating Voltage
Range +18 to + 32 VDC, +28 VDC Nominal
Digital Audio Specifications
Number of Audio Inputs 4 –Entertainment
1 –D/A Conversion
Number of Audio
Outputs 1 - FiberLink
Analog Audio Input Specifications
Number of Audio Inputs 1
Input Signal Level +1 to + 5 VRMS, +2 VRMS optimum
(differential)
Input Impedance 4.7 k-ohm / input
Frequency Response 20 Hz –20 kHz +/- 1 dB
PA Audio Input +1 to +5 VRMS, +2 VRMS optimum
@ 1 k-ohm
Analog Audio Output Specifications (P6 & P9 only)
Number of Audio
Outputs 1
Output Power 530 mW / Channel RMS
Output Impedance 50-ohm MINIMUM
(common ground output)
PA and Video Briefer Key Input Specifications
Active Signal Type Ground
Active Signal Level < +1.2 VDC

Audio International, Inc. ASP-101-02-x Installation & Operation
Document #540183, Rev IR, 6/2000 Page 14 of 14
7.0 Reference Drawings
The following diagrams show the unit dimensions and connector locations for the
ASP-101-02-x. All dimensions are shown in inches.