Jupiter Avionics JA94-001A User manual

Rev
B Page i
JA94-001A
Dual Audio Controller
Installation and Operating Manual
Rev. B
Jupiter Avionics Corporation
1959 Kirschner Road
Kelowna BC
Canada V1Y 4N7
Tel: [phone]
Toll-Free: 1 855 478 2232
www.jupiteravionics.com

JA94-001ADual Audio Controller
Installation and Operating Manual
Rev APage ii
Copyright 2017Jupiter Avionics Corp.
All rights reserved
Jupiter Avionics Corporation (JAC) permits a single copy of this manual to be printed or downloaded for the express use
of an installing agency. Any such electronic or printed copy of this manual must contain the complete text of this copyright
notice. Any unauthorized commercial distribution of this manual is strictly prohibited. Except as described above, no part
of this manual may be reproduced, copied, transmitted, disseminated, downloaded, or stored in any storage medium for
any purpose without the express prior written consent of JAC.
RECORD OF REVISIONS
Revision
Rev Date
Description
ECR
A
Sep 2017
Initial release, Serial number 1001 and higher.
Prepared:
MPB
Checked:
Approved:
IMPORTANT:
Information in this document is subject to change without notice.
To confirm the current revision status of this manual, visit the JAC website:
www.jupiteravionics.com
4981
JAC
SRM
10-16-17 JAC
KDV
10-17-17
BDec 2017 Revise Features Overview 5302
JAC
KDV
12-04-17 JAC
MQS
12-06-17

JA94-001ADual Audio Controller
Installation and Operating Manual
Rev A Page iii
Table of Contents
SECTION 1 - DESCRIPTION ................................................................................................................................................. 1
1.1 System Overview ....................................................................................................................................................1
1.2 Features Overview..................................................................................................................................................1
1.3 Inputs and Outputs..................................................................................................................................................2
1.3.1 Inputs...............................................................................................................................................................2
1.3.2 Outputs............................................................................................................................................................2
1.3.3 Bi-directional Ports..........................................................................................................................................2
1.4 Specifications..........................................................................................................................................................2
1.4.1 Electrical Specifications...................................................................................................................................2
1.4.2 Mechanical Specifications...............................................................................................................................4
1.4.3 Environmental Specifications...........................................................................................................................4
SECTION 2 – INSTALLATION............................................................................................................................................... 5
2.1 Introduction..............................................................................................................................................................5
2.2 Continued Airworthiness .........................................................................................................................................5
2.3 Unpacking and Inspecting Equipment.....................................................................................................................5
2.3.1 Warranty..........................................................................................................................................................5
2.4 Installation Procedures............................................................................................................................................5
2.4.1 Installation Limitations.....................................................................................................................................5
2.4.2 Cabling and Wiring..........................................................................................................................................5
2.4.3 Mechanical Installation....................................................................................................................................6
2.4.4 In-Line PTT Cordsets......................................................................................................................................6
2.4.5 Legend Replacement......................................................................................................................................6
2.4.6 Post Installation Checks..................................................................................................................................6
2.5 Adjustments and Configuration using ProCS™......................................................................................................7
2.5.1 Configuration Cabling Requirements..............................................................................................................7
2.5.2 ProCS™ Setup................................................................................................................................................7
2.5.3 Configurable Settings......................................................................................................................................7
2.5.4 Other Configuration Features........................................................................................................................13
2.6 Installation Kit........................................................................................................................................................14
2.6.1 Recommended Crimp tools...........................................................................................................................14
2.7 Installation Drawings.............................................................................................................................................14
2.7.1 Generation of Custom Drawings...................................................................................................................14
SECTION 3 – OPERATION..................................................................................................................................................15
3.1 Introduction............................................................................................................................................................15
3.2 Front Panel Controls .............................................................................................................................................15
(1) (2) NAV1- COM4 Receive Select Switches and Legends..................................................................................16
(3) COM5/COM6 Receive Select Switches and Legends..................................................................................16
(4) VOX Threshold Control.................................................................................................................................16
(5) (8) Transmit Selector ..........................................................................................................................................17
(7) (10) RX/ICS Volume control and legend ..............................................................................................................18
(9) Music/Configuration Connector cover (♫/io).................................................................................................18
3.3 Normal Operation Mode........................................................................................................................................18
3.3.1 Panel Lighting................................................................................................................................................18
3.3.2 Receiving.......................................................................................................................................................18
3.3.3 Transmitting (Transmit Operation) ................................................................................................................19
3.3.4 VOX Operation..............................................................................................................................................19
3.3.5 ICS Operation................................................................................................................................................19
3.3.6 ICS Isolation Operation.................................................................................................................................20
3.3.7 Direct Audio Operation..................................................................................................................................20
3.3.8 Music Operation............................................................................................................................................20
3.3.9 Rear Hand Mic Operation .............................................................................................................................20
3.3.10 Cockpit Voice Recorder (CVR) Operation ....................................................................................................20
3.3.11 Remote RMT Operation................................................................................................................................20
1.4.4Flammability of Materials ................................................................................................................................4

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3.4.3 Auto Emergency Mode..................................................................................................................................21
3.4.4 Selected Emergency Mode...........................................................................................................................21
Appendix A - Installation Drawings...................................................................................................................................A1
A1 Introduction............................................................................................................................................................A1
A2 Installation Drawings.............................................................................................................................................A1
Appendix B - Installation Documents ...............................................................................................................................B1
B1 Airworthiness Approval .........................................................................................................................................B2
B2 Instructions for Continued Airworthiness ..............................................................................................................B2
3.4 Left User Emergency Mode ..........................................................................................................................21
Right User Emergency Mode........................................................................................................................21
Emergency Operation Mode.................................................................................................................................21
3.4.1
3.4.2

Rev BPage 1
JA94-001A Dual Audio Controller
SECTION 1 - DESCRIPTION
1.1 System Overview
The JA94-001A dual audio controller is a centralized management system for two independent users that distributes
and controls all transceiver, receiver and warning source audio in an aircraft. It enables the selected transmission of
microphone audio to one or more transceivers and distributes all intercom audio. The JA94-001A dual audio controller
can be used in a standalone configuration or a star configuration to prevent the loss of the entire system due to the
failure of one controller. It provides a passive emergency mode that directs the Right User to the COM1 transceiver
and NAV1 receiver, and the Left User to COM2 transceiver and NAV2 receiver.
The JA94-001A is set up on a per-installation basis using a configuration cable and a PC running the product
configuration tool to download system configuration settings via the front panel music / configuration connector. To
facilitate future customizations and certification, neither software nor complex electronic devices are used in the JA94-
001A design.
1.2 Features Overview
The JA94-001A is comprised of four main subassemblies: the upper (receive) subassembly features a 37 pin D-Min
connector, which interfaces to the radio receive audio and user phones. The lower (transmit) subassembly features a
50 pin and 15 pin D-Min connectors which interfaces to the power and passenger headset connections. This layout
minimizes crosstalk and follows industry standard interconnect for multi-user single channel audio controllers. The
middle (microphone) subassembly has microphone and VOX circuitry. The front (faceplate) subassembly contains the
removable legend interface. Numerous input and output levels are adjustable andseveral audio paths are selectable
using the configuration tool ProCS™ (Product Configuration Software) to write configuration commands via a
configuration cable to the front panel music / configuration connector. The configuration commands set the level of
non-volatile digital control potentiometers to control audio signal levels and to non-volatile expander latches which are
connected to audio gates to control the audio signal routing.
The JA94-001A supports up to 6 transceivers, each selectable from two rotary switches.
The JA94-001A supports up to 4 selectable receivers in two banks of 4 switches.
The JA94-001A provides intercom functions for up to 2users and up to 6 passengers.
The JA94-001Ahas individual VOX gating for each user and passenger.
The JA94-001Asupports two Direct Audio inputs to Left and Right Users in Normal and Emergency mode.
The JA94-001A supports a third Direct Audio input in Normal mode only.
The Direct Audios may be routed to both Left and Right User phones or Direct Audio 2 routed to Right User and Direct
Audio 1 to Left User. All Users can hear Direct Audio 3.
The JA94-001A allows the receive audios to be disconnected from the Passenger Phones.
The JA94-001Asupports two CVR outputs.
The JA94-001Aallows transmit access for five crew members (Right User, LeftUser, Passenger 1, Passenger 2, and
Passenger 6).The JA94-001A allows ICS PTT access for allusers and passengers.
The JA94-001A features a Music / Configuration connector on the faceplate for configuration of audio levels and
routing. The port can also be used as a music input and is compatible with most music players.
The JA94-001A has three modes of operation: Normal Mode, Emergency Mode and ICS Isolate Mode.
The JA94-001A supports radio simulcast.
The JA94-001A supports a remote transmit select input.

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1.3 Inputs and Outputs
Refer to the JA94-001A connector mapsfor the mating connector designators and pin assignments for the
input and output signals.
1.3.1 Inputs
Name
Qty
Type
COM Remote TX Select 6
CONFIG DATA TO JA94-001A 1
DIRECT AUDIO 3
ICS Isolate Mode 1
ICS PTT8
LIGHTS INPUT 1
MIC 8
MODE SELECT 1
MUSIC 4
POWER INPUT 1
Control signal, Active Low
Data signal
Audio signal (Configurable via ProCS)
Control signal, Active Low (Function configurable)
Control signal, Active Low
Analog control signal
Audio signal
Multi format signal
Audio signal (two, Configurable via ProCS)
Power supply, 28 Vdc
RX HI/LO 10 Audio signal (6 COMs, 4 NAVs)
TX PTT 5 Control signal
1.3.2 Outputs
Name
Qty
Type
CVR 2
CONFIG DATA FROM JA94-001A 1
Headphones 7
Transceiver MIC 6
Transmit PTT 6
RX COMP OUT 2
Audio signal (Configurable via ProCS)
Data signal
Audio signal (Note: 7 outputs for driving 8 phones)
Audio signal
Control signal, Active Low
Audio signal (Configurable via ProCS)
1.3.3 Bi-directional Ports
Name
Qty
Type
ICS TIE 1 Audio signal
1.4 Specifications
1.4.1 Electrical Specifications
Power Input
28 Vdc
32.2 Vdc
22.0 Vdc
18.0 Vdc
≤15.0 Vdc
Primary nominal voltage
Maximum voltage
Minimum voltage
Emergency voltage
Power Off Voltage
Input current at 28 Vdc
Input current at 18.0 Vdc 0.95 A max
1.5 A max

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Page 3
1.4.1.1 Audio Performance
Rated Input Level
Receive audio rated input level 7.75 Vrms  10%
Direct audio rated input level 7.75 Vrms  10%
Music rated input level 400 mVrms  10%
Microphone input level 250 mVrms  10%
Intercom Tie Line type 1 input level 340 mVrms  10%
Intercom Tie Line type 2 input level 1.20 Vrms  10%
Rated Output Level
PHN rated output 8.7 Vrms  10%
LEFT or RIGHT USER PHN rated output in emergency mode 2.34 Vrms ± 20%
Phone rated output level, with MUSIC input 4.35 Vrms  10%
COM MIC rated output 0.250 Vrms  10%
CVR rated output 0.500 Vrms  10%
CVR rated output with MUSIC INPUT 0.250 Vrms  10%
CVR rated output with MIC INPUT 1.00 Vrms  10%
CVR rated output, in emergency mode, 0.500 Vrms  10%
RX COMP rated output 2.50 Vrms  10%
Intercom Tie Line type 1 rated output 340 mVrms  10%
Intercom Tie Line type 2 rated output 1.20 Vrms  10%
Audio Frequency Response
Audio output audio frequency response ≤ 3 dB from 300 to 6000 Hz
Distortion Characteristics
Audio output distortion at rated power ≤ 10%
Input Impedance
Microphone input Impedance 150   10%
Direct Audio input Impedance 1000   10%
Receive Audio input Impedance 1000   10%
Music Audio input Impedance 1000   10%
Intercom Tie Line Audio input Impedance 2000   10%
Output Load
Phone load 600   10%
Transceiver Microphone load 150   10%
CVR load 5000   10%
Receive Composite Audio load 600   10%
Intercom Tie Line type 1 rated load 2000   10%
Intercom Tie Line type 2 rated load 2000   10%
Intercom Tie Line type 1 maximum load 666  max (3 loads)
Intercom Tie Line type 2 maximum load 285  max (7 loads)
Volume Controls
Receive Audio control variation 32  3 dB min
ICS Audio control variation 42  3 dB min
Crosstalk Level
Input to Output crosstalk ≤ 55 dB
Input to Input crosstalk ≤ 60 dB
Station to Station crosstalk ≤ 65 dB
Audio Noise Level without Signal
Noise level below the rated output ≥60 dB

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1.4.1.2 Audio Performance, Other
CVR HI / LO output circuitry type (Normal) differential
CVR HI / LO output circuitry type (Emergency) single ended
Microphone inputs designed for MIC type amplified dynamic/electret
Microphone inputs bias voltage 12 Vdc  10%
Microphone inputs circuitry type single ended
MUSIC LEFT / RIGHT HI / LO audio input circuitry type differential
FRONT MUSIC LEFT / RIGHT audio input circuitry type: single ended
MUSIC attenuation 38 dB max
RECEIVE AUDIO input circuitry type differential
PHN HI / LO output circuitry type single ended
MIC output circuitry type differential
RX Composite Audio output circuitry type differential
ICS TIE HI / LO Circuitry Type differential
PHN HI / LO output music fade in duration
VOX Threshold level range relative to rated MIC input
VOX off Delay Time range
Transmit Timeout Timer
1.4.1.3
Lights Input
LIGHTS INPUT ranges
LIGHTS INPUT current
1.4.2 Mechanical Specifications
Height
Behind panel depth
Faceplate width
Behind panel width
Weight
Material
Connectors: J1
J2
J3
J4
J5
Mounting
Bonding
Installation kit part number
2.5 ± 1.0 seconds
-28 to +6 dB
0.5 to 2.0 seconds
90 ± 10 seconds
0 to 28, 0 to 14 and 0 to 5 Vdc
10 mA max.
1.875 in [47.63 mm] max
5.48 in [139.2 mm] max
5.75 in [146.1 mm] max
5.00 in [127 mm] max
1.99 lbs. [0.91 kg] max
brushed aluminum with conversion
coating
One 37-pin D-Sub male, Slide lock posts
One 50-pin D-Sub male, Slide lock posts
One 15-pin D-Sub male, Slide lock posts
One 4 pole 3.5mm stereo jack
One 4-40 stud, 0.5 in. max
4 Dzus fasteners
≤2.5 mΩ
INST-JA94
1.4.3 Environmental Specifications
The JA94-001A Dual Audio Controller has been qualified to the environmental conditions listed below. Environmental
categories for which TSO compliance has been demonstrated are listed in the Environmental Qualification Form in
Appendix B of this manual.
Temperature:
Operating -45 °C to +70 °C
Ground Survival -55 °C to +85 °C
Altitude 50,000 ft
Humidity Cat A (48 hours)
Shock, Crash Safety 6 g, 20 g for 11 ms
1.4.4 Flammability of Materials
The JA94-001A complies with the requirements of RTCA/DO-160G Sec 26.3.3 "Flammability", through equivalent
flammability testing of materials and the Small Parts Exemption.

Rev BPage 5
JA94-001A Dual Audio Controller
SECTION 2 – INSTALLATION
2.1 Introduction
This section contains unpacking and inspection procedures, installation information, and post-installation checks.
2.2 Continued Airworthiness
Maintenance of the JA94-001A is on condition only. Scheduled inspection and/or periodic maintenance of this unit is
not required.
2.3 Unpacking and Inspecting Equipment
Unpack the equipment carefully. Check for shipping damage and report any problems to the relevant carrier. Confirm
that the Authorized Release Certificate or Certificate of Conformance is included. Complete the on-line warranty card
from the Jupiter Avionics Corporation (JAC) website – www.jupiteravionics.com/warranty
2.3.1 Warranty
All products manufactured by JAC are warranted to be free of defects in workmanship or performance for 2 years
from the date of installation byan approved JAC dealer or agency. This warranty covers the cost of allmaterials and
labour to repair or replace the unit, but does not include the cost of transporting the defective unit to and from JAC or
its designated warranty repair centre, or of removing and replacing the defective unit in the aircraft. This warranty
does not cover failures dueto abuse, misuse, accident, or unauthorized alteration or repairs.
THIS WARRANTY IS VOID IF THE PRODUCT ISNOT INSTALLED BY AN AUTHORIZED JAC DEALER. If the on-
line warranty card isnot completed,the product will bewarranted from the date of manufacture.
Contact JAC for return authorization, and for anyquestions regarding this warranty and how it applies to your unit(s).
JAC isthe final arbiter concerning warranty issues.
2.4 Installation Procedures
WARNING: Loud noise can cause hearing damage. Set the headset volume to minimum before
conducting tests, and slowly increase the volume to a comfortable listening level.
CAUTION: The power input circuitry of the unit may be damaged if the installation does not conform to the
wiring instructions in this manual.
2.4.1 Installation Limitations
The conditions and tests for CAN TSO approval of the JA94-001A are minimum performance standards.
Those installing the JA94-001A, on or in a specific type or class of aircraft, must determine that the aircraft
installation conditions are within TSO standards. The JA94-001A may be installed only by following the
applicable airworthiness requirements.
2.4.2 Cabling and Wiring
All wire shall be selected in accordance with the original aircraft manufacturer’s maintenance instructions, or AC43.13-
1B Change 1, Paragraphs 11-76 through 11-78. Unshielded wire types shall qualify 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 tag ring or equivalent (for shield terminations) to make the most compact and easily
terminated interconnect. Follow the Connector Map in Appendix A of this manual.

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Allow 3” from the end of the shielded wiring to the shield termination to allow the connector hood to be easily installed.
Refer to the Interconnect drawing in Appendix A of this manual for shield termination details. Note that this unit has a
‘clamshell’ hood that is installed after the wiring is complete.
Maintain wire segregation and route wiring in accordance with the original aircraft manufacturer’s maintenance
instructions.
Refer to the Interconnect drawing for additional specifications. Check 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.
2.4.3 Mechanical Installation
The JA94-001A can be mounted in any attitude and location with adequate space for the front panel and sufficient
clearance for the connector and wiring harness. It requires no direct cooling.
Note: During bench test set up, it is normal for the JA94-001A chassis to become warm to the touch.
2.4.4 In-Line PTT Cordsets
If in-line PTT cordsets (drop cords) are used, be aware that incorrectly configured or improperly shielded in-line PTT
cordsets can lead to significant audio problems.
2.4.5 Legend Replacement
The JA94-001A illuminated legends are field replaceable. For further information, refer to the ‘Legend Replacement’
document in Appendix A of this manual.
2.4.6 Post Installation Checks
2.4.6.1 Voltage/Resistance checks.
Do not attach this unit until the following conditions are met:
a) Check P1 pin 19 for lights buss voltage +28 Vdc +14 Vdc or +5 Vdc.
b) Check P2 pin 17 for +28 Vdc power relative to ground.
c) Check P2 pin 34 for continuity to ground (less than 0.5 Ω).
d) Check P2 pins 6 thru 10for continuity to ground (less than 0.5 Ω) when the relevant switch is closed.
e) Check P3 all pins for continuity to ground (less than 0.5 Ω) when the relevant switch is closed or selection
made.
f) Check all pins for shorts to ground or adjacent pins.
2.4.6.2 Configuration
Ensure that the JA94-001A contains the correct configuration settings. This may be done at the factory, on the
maintenance bench or in the aircraft before or during the power on checks. Refer to section 2.5.1.
2.4.6.3 Power on Checks.
Power up the aircraft’s systems and confirm normal operation of all functions of the JA94. Refer to
Section 3 (Operation) for specific operational details.
a) Begin with only the Right user headset attached. Confirm correct ICS and radio operation for both receive and
transmit. Check yoke or cyclic switch action. Check the radio selection and inputs. Do not proceed until the
radios are functioning correctly.
b) If there is a music source in the system, turn it on and check for proper mute operation.

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c) Unusual buzzes, hums or other background audio are symptomatic of multiple grounds, or noisy external
systems such as blowers or pumps sharing wiring with the audio system. If a transmitter fails to key or
correctly modulate it is often the result of not connecting all required grounds to the radio or external audio
system.
d) Check the ICS operation and Emergency operation.
e) Plug in the Left user headset. Check for correct ICS operation. Check yoke or cyclic switch functions.
f) Plug in any remaining headsets, and check for correct ICS operation. Note that an incorrect cordset (drop cord)
or improper jack wiring may cause a wide range of problems, from loss of audio to a tone heard in the headset.
g) Check that all configurations settings are correct.
When all performance checks are satisfied, complete the necessary regulatory documentation before releasing the
aircraft for service. Refer to Appendix B.
2.5 Adjustments and Configuration using ProCS™
All the JA94-001A internal adjustments are set from the Product Configuration Software ProCS™. Configuration data
is sent to the JA94-001A via the front panel connector (♫/io), using the Configuration Cables and a computer running
the ProCS™ software. For configuration requirements, see section 2.5.1.
For full information on the configuration process, and for installation of ProCS™on your computer, refer to the
ProCS™ manual on the Jupiter Avionics website - www.jupiteravionics.com/productsoftware.
2.5.1 Configuration Cabling Requirements
To configure the JA94-001A, it is necessary to load the Product Configuration Software ProCS™ onto a Windows-
based computer as described in the ProCS™ manual.
The cables required to configure the JA94-001A are not included with the unit.
Cabling option 1:
Quantity Description JAC Part #
1 USB A to RS232 9-Pin Cable CAB-USB-0002
1 Configuration Cable JA99-001
Cabling option 2:
Quantity Description JAC Part #
1 USB A Male to RS232 3.5mm Plug CAB-USB-0006
2.5.2 ProCS™ Setup
The ProCS™ JA94-001A menu item 'ProCS Setup' provides Setup drawings showing the cabling
arrangement for connecting the JA94-001A to a computer running the ProCS™.
2.5.3 Configurable Settings
A standard unit is shipped from the factory with all internal adjustments configured to the default levels. At installation,
it may be desirable to change some of these settings to suit the local operating environment.
Note: To properly configure the JA94-001A, power must be applied, and the left TX Select switch must be in
the COM1 to COM6 position.
Within ProCS™, the configurable settings are grouped together into the following sections:

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2.5.3.1 Front Panel Switches
The Front Panel Switches window is used to specify the text for each legend.
Note: If the name of a front panel switch is changed using this software, the change will be incorporated in
every other section that refers to that switch name, including the connector maps.
2.5.3.2 Radios
The Radios window is used to define the radios
for the transceivers, receivers and CVR.

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2.5.3.3 Receive Levels
The receive and direct audio input level of each of the eight RX and the three
DIRECT AUDIO inputs can be adjusted from 1 to 10 Vrms. (Default 7.75 Vrms)
The Receive Audio Detector threshold can be adjusted from
-36 to -12 dB of rated input level. (Default -24 dB)
The level of the receive composite audio output (RX COMP OUT)
can be adjusted from 0.25 to 2.5 Vrms. (Default 1.00 Vrms)

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2.5.3.4 Transmit Levels
When the Transmit Timeout check box is checked the transmit time-
out is enabled (Default not checked)
When the COM5 Duplex check box is checked the COM5 (FM2) radio
is set to duplex operation (Default not checked) (see section 3.3.4)
2.5.3.5 Simulcast Selection
The level of each of the six Transceiver MIC output signals can be
adjusted from 0.01 to 1 Vrms. (Default 250 mVrms)
When a User's COM6 Simulcast Enable button is
checked, the COM1 through COM5 radios may
be selected for simulcast (active together).

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2.5.3.6 Sidetone Levels
2.5.3.7 Passenger Settings
Note: When Legacy Passenger ICS Mode is selected, the Passenger Mics are controlled by the VOX control
until the fully cw (PTT) position is reached. Then the Passenger Mics are automatically set to the minimum
VOX level and should be controlled by in-line PTT drop-cords.
2.5.3.8 Connector Pin Configuration
Several of the connector pins can be configured to meet the requirements of specific installations. Refer to JA94-001A
Interconnect sheet 5 of 6. Direct Audio routing can also be selected in this section.
The Receive Sidetone Level can be adjusted from 0 to
-12 dB of the rated
p
hone Level.
(
Default -6 dB
)
The level of the COM6 Artificial Sidetone can be adjusted
from 0 to -40 dB of the rated
p
hone Level.
(
Default -6 dB
)
ICS Isolation Mode can be selected for the Right User, Left User or Crew (both users).
Routing for DIRECT 1 and 2 can be selected as shown.
Passengers can be assigned to either the RIGHT or LEFT USER
controls and will hear the assigned user's Receive Audio.

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2.5.3.9 Audio Muting (During Transmit)
When the Mute RX Audio check box is checked the Receive
Audio is muted during transmit (Default checked)
When the Mute ICS Audio check box is checked the ICS
Audio is muted during transmit (Default checked)
The Mute Music Audio check box is always checked
(i.e. Mute Music Audio is always enabled.)
2.5.2.10 CVR Level
2.5.3.11 Music Levels
The output levels of the Cockpit Voice Recorder audio
may be adjusted as shown.
LEFT USER, RIGHT USER and Music Input Levels
may be individually adjusted.

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2.5.3.12 ICS Tie Line
The rated input and output levels of the intercom tie line can be selected as Type 1 or Type 2 (Default Type 2).
The quantity of external loads for a type1 intercom tie line can be selected from 0 to 3 (Default 0).
The quantity of external loads for a type 2 intercom tie line can be selected from 0 to 7 (Default 0).
2.5.3.13 Lighting Voltage Selection
The rated input level for the lighting
voltage may be selected from
+5 Vdc, +14 Vdc or +28Vdc
(Default +28 Vdc).
2.5.3.14 VOX
2.5.3.15 Connector Maps
This section contains connector maps and interconnects that are automatically generated to show changes that affect
the installation of the JA94-001A,such as switch labels and voltages. See section 2.7.1.
2.5.4 Other Configuration Features
In the JA94-001A Product Information Window, the model number, serial number and check sum ofthe JA94-001A
audio controller can be viewed.
The VOX OFF Delay Time can be adjusted
from 0.50 to 2.00 sec (Default 1 sec).

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2.6 Installation Kit
The kit required to install this unit is not included with the unit.
The installation kit (Part # INST-JA94) consists of the following:
Quantity Description JAC Part #
1 15 Socket Positions, Zinc Plated, D-Subminiature - Crimp Socket Housing CON-3460-0115
1 37 Socket Positions, Zinc Plated, D-Subminiature - Crimp Socket Housing CON-3460-0137
1 50 Socket Positions, Zinc Plated, D-Subminiature - Crimp Socket Housing CON-3460-0150
1 15 Pin Clamshell, Hardware - Plastic D-Sub Hoods CON-5300-0115
1 37 Pin Clamshell, Hardware - Plastic D-Sub Hoods CON-5300-0137
1 50 Pin Clamshell, Hardware - Plastic D-Sub Hoods CON-5300-0150
102 Machined 20 to 24 AWG wire size range, MIL spec, D-Submin - Crimp Socket CON-3320-2024
3 For Any D-sub Connector, Hardware - Slide Locks - Vertical CON-5275-0050
2 0.625" Inside Diameter, Hardware - Tag Ring CON-5500-0625
2 1" Inside Diameter, Heat Shrink Tube WIR-HTSK-1000
2.6.1 Recommended Crimp tools
Tool Type
Hand crimp tool
Positioner
Insertion/extraction tool
Positronic
9507-0-0-0
9502-5-0-0
4711-2-0-0
Daniels
AFM8
K13-1
91067-2
MIL-SPEC
M22520/2-01
M22520/2-08
M81969/1-02
2.7 Installation Drawings
The drawings and documents required for Installation can be found in Appendix A of this manual.
2.7.1 Generation of Custom Drawings
The interconnects and connector maps in Appendix A of this manual are generic drawings based on the standard
version of the JA94-001A. However, if a unit has been configured using JAC’s ProCS™ software to change switch
legends or lighting voltages, the software can be used to generate fully customized interconnects and connector
maps for use by the installer.

Rev BPage 15
JA94-001A Dual Audio Controller
SECTION 3 – OPERATION
3.1 Introduction
This section contains the operating instructions for the JA94-001A.
3.2 Front Panel Controls
Note: The 21 legends and 2 deadfront annunciators are removable and may be replaced with custom
ordered parts. For the purpose of this manual the controls will be referred to by the default legend and
annunciator names as shown below.
1. Left User Receive select switches,TXselect annunciators and associated legends
2. Right User Receive select switches,TXselect annunciators and associated legends
3. Left and Right User COM5/COM6 receive select switches,TXselect annunciators and
associated legends
4. VOX threshold control
5. Left User Transmit Selector Switch and Emergency Switch
6. EMER (Emergency) Legend
7. Left User ICS/RX Volume controlsand legend
8. Right User Transmit Selector Switch
9. Music/configuration input connector cover (/io)
10. RightUser ICS/RX Volume controlsand legend
11. Left User Transmit Deadfront Annunciator
12. Right User Transmit Deadfront Annunciator
1
2
4
5
6
7
3
8
9
10
11
12

JA94-001A Dual Audio Controller
Installation and Operating Manual
Rev BPage 16
(1) (2) NAV1- COM4 Receive Select Switches and Legends
Each User has four white two-position centre-off toggle
switches for the NAV1/COM1 to NAV4/COM4
receivers/transceivers. When a left or right switch is set
to the 'up' position, audio from the receiver associated
with the legend above the switch is routed to the phones
of that side's user (and passengers if configured.) In the
'down' position, audio from the transceiver associated
with the legend below the switch is routed to the phones
of that side's user (and passengers if configured.)
The backlit legends are interchangeable to allow
customization. The default legends are NAV1, NAV2,
NAV3 and NAV4 above the switches, and COM1,
COM2, COM3 and COM4 below the switches.
(3) COM5/COM6 Receive Select Switches and Legends
The COM5/COM6 switches are two white two-position centre-off
toggle switches. The left-hand switch is associated with the Left
User, and the right-hand switch is for the Right User.
To select COM5, the appropriate switch is set to the 'up' position,
and for COM6 it is in the 'down' position. Audio from the
associated receiver is routed to the phones of that side’s user
(and passengers if configured).
The backlit legends are interchangeable to allow customization.
The default legends are COM5 above the switches and COM6
below the switches.
(4) VOX Threshold Control
The VOX Threshold Control is an unlit rotary knob in the
centre top of the panel that is used to set the VOX
threshold level of the unit for all users and passengers.
When rotated fully clockwise (cw), the threshold will be
at maximum, VOX ICS operation is disabled and ICS
PTT input is required for ICS operation.
When rotated fully counterclockwise (ccw), the threshold
will be at minimum (almost live).
To adjust the unit for VOX (Voice activated) use, the
VOX control should be set fully ccw and then slowly
rotated cw to the point where no intercom audio can be
heard. The VOX control may require adjustment for
proper operation as ambient noise changes.