Jupiter Avionics JA37-201 User manual

Rev
B Page i
JA37-201
Aural Message Generator - 6 Channel
Installation and Operating Manual
Rev A
Jupiter Avionics Corporation
1959 Kirschner Road
Kelowna BC
Canada V1Y 4N7
Tel: [phone]
Toll-Free: 1 855 478 2232
www.jupiteravionics.com

JA37-201 Aural Message Generator - 6 Channel
Installation and Operating Manual
Rev A Page ii
Copyright 2022 Jupiter 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
Jan 2022
Initial release, Serial number 1001 and higher.
4002
Prepared:
DGB
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
JAC
DB
01-26-22 JAC
KDV
01-27-22

JA37-201 Aural Message Generator - 6 Channel
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
1.4 Specifications .......................................................................................................................................................... 2
1.4.1 Electrical Specifications................................................................................................................................... 2
1.4.2 Mechanical Specifications ............................................................................................................................... 3
1.4.3 Environmental Specifications .......................................................................................................................... 3
1.4.4 Flammability of Materials ................................................................................................................................ 3
SECTION 2 – INSTALLATION............................................................................................................................................... 4
2.1 Introduction.............................................................................................................................................................. 4
2.2 Continued Airworthiness ......................................................................................................................................... 4
2.3 Unpacking and Inspecting Equipment..................................................................................................................... 4
2.3.1 Warranty.............................................................................................................................................................. 4
2.4 Installation Procedures............................................................................................................................................ 4
2.4.1 Installation Limitations ......................................................................................................................................... 4
2.4.2 Cabling and Wiring .............................................................................................................................................. 5
2.4.3 Mechanical Installation ........................................................................................................................................ 5
2.4.4 Post Installation Checks ...................................................................................................................................... 5
2.5 System Operation.................................................................................................................................................... 5
2.5.1 Configuration Operation .................................................................................................................................. 5
2.5.2 Message Mute Operation................................................................................................................................ 6
2.5.3 Message Operation ......................................................................................................................................... 6
2.5.4 Power On Self-Test Operation ........................................................................................................................ 6
2.5.5 Priority Operation ............................................................................................................................................ 6
2.5.6 Non-Priority Operation..................................................................................................................................... 6
2.5.7 RX Audio Operation ........................................................................................................................................ 6
2.6 Adjustments and Configuration using ProCS™ ...................................................................................................... 6
2.6.1 Configuration Cabling Requirements .............................................................................................................. 6
2.6.2 ProCS™ Setup................................................................................................................................................ 7
2.6.3 Configurable Settings ...................................................................................................................................... 7
2.6.4 Other Configuration Features........................................................................................................................ 11
2.7 Installation Kit ........................................................................................................................................................ 11
2.7.1 Recommended Crimp Tools ......................................................................................................................... 11
2.8 Installation Drawings ............................................................................................................................................. 11
2.8.1 Generation of Custom Drawings ................................................................................................................... 11
SECTION 3 – OPERATION.................................................................................................................................................. 12
3.1 Introduction............................................................................................................................................................ 12
3.2 Mute Switch/Button ............................................................................................................................................... 12
Appendix A - Installation Drawings...................................................................................................................................A1
A1 Introduction............................................................................................................................................................A1
A2 Installation Drawings .............................................................................................................................................A1
Appendix B - Certification Documents .............................................................................................................................B1
B1 Airworthiness Approval .........................................................................................................................................B2
B2 Instructions for Continued Airworthiness ..............................................................................................................B2

Rev A Page 1
JA37-201 Aural Message Generator - 6 Channel
SECTION 1 - DESCRIPTION
1.1 System Overview
The JA37-201 Aural Message Generator - 6 Channel is a dual channel alerting system that provides up to six different
messages.
The JA37-201 is set up on a per-installation basis using cable CAB-USB-0006, or Configuration Cable JA99-001 and
CAB-USB-0002, and downloading the system configuration settings and aural messages into non-volatile devices.
1.2 Features Overview
All internal adjustments are quickly made using the proprietary ProCS (Product Configuration Software).
Two ports are provided beside the main connectors for configuration loading.
All audio outputs are balanced.
Each message channel has two separate trigger inputs which may be active low or high dependent on the
configuration.
Each generator is provided with two isolation amplifiers.
The messages may be muted by an external switch/button.
The JA37-201 supports message lengths up to 11 seconds.
The JA37-201 is provided with a power-on Self-Test.

JA37-201 Aural Message Generator - 6 Channel
Installation and Operating Manual
Rev A Page 2
1.3 Inputs and Outputs
Refer to the JA37-201 connector maps for the mating connector designators and pin assignments for the
input and output signals.
1.3.1 Inputs
Name
Qty
Type
CONFIG DATA TO JA37-201
2
Data signal
MESSAGE TRIGGER
12
Active High/low discrete (Configurable)
MESSAGE MUTE
2
Active low discrete
POWER INPUT
2
Power supply
RX 1&2 HI/LO
4
Audio signal (Configurable)
1.3.2 Outputs
Name
Qty
Type
CONFIG DATA FROM JA37-201
2
Data signal
GROUND
4
Ground reference
PHONES HI/LO
4
Audio signal
LOW ISOLATION HI/LO
4
Audio signal
HIGH ISOLATION HI/LO
4
Audio signal (Configurable)
1.4 Specifications
1.4.1 Electrical Specifications
Power Input
Primary nominal voltage 28 Vdc
Secondary nominal voltage 14 Vdc
Maximum voltage 30.3 Vdc
Minimum voltage 11.0 Vdc
Emergency voltage 9.0 Vdc
Input current 0.5 A max per generator
1.4.1.1 Audio Performance
Rated Input Level
RX audio rated input level 7.75 Vrms ±10 %
Rated Output Level
Phones rated output power into 600 Ohm 7.75 Vrms ±10 %
Phones low isolation rated output power into 600 Ohm 3.87 Vrms ±10 %
Phones high isolation rated output power into 600 Ohm 1.94 Vrms ±10 %
Audio Frequency Response
Phones output audio frequency response ≤3 dB from 300 to 6000 Hz
Distortion Characteristics
Phones audio output distortion at rated power ≤10 %

JA37-201 Aural Message Generator - 6 Channel
Installation and Operating Manual
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Input Impedance
Receive Audio input Impedance 1000 Ω±10%
Output Impedance
Phones output Impedance 300 Ω±20 %
Phones low isolation output Impedance 1.2 kΩ±20 %
Phones high isolation output Impedance 3.0 kΩ±20 %
Output Load
Phones load 600 Ω±10 %
Input to Input Crosstalk Level
Input to Input crosstalk ≤60 dB
Audio Noise Level without Signal
Noise level below the rated output ≥60 dB
1.4.1.2 Audio Performance, Other
RX input circuitry type Transformer coupled
Phones output circuitry type Transformer coupled
1.4.1.3 Discrete Signals
Message Trigger (active low) signal level active ≤+3 Vdc
Message Trigger (active low) signal level inactive ≥+6 Vdc
Message Trigger (active high) signal level active ≥+8 Vdc
Message Trigger (active high) signal level inactive ≤+6 Vdc
Message Mute active low signal ≤+3 Vdc
1.4.2 Mechanical Specifications
Height 2.34 in [59.4 mm] max
Depth (excluding connectors) 4.42 in [112.3 mm] max
Width (including flanges) 4.52 in [114.8 mm] max
Width (without flanges) 3.52 in [89.4 mm] max
Weight 0.91 lb [0.41 kg] max
Connectors (4): J1, J3 Two 25-pin D-Sub male V5 locking
J2, J4 Two 4 pole 3.5mm jacks
Mounting 4 x 10-32 fasteners
Bonding ≤2.5 mΩ
Installation kit part number INST-JA37 (2 required)
1.4.3 Environmental Specifications
Temperature:
Operating -45 °C to +70 °C
Ground Survival -55 °C to +85 °C
1.4.4 Flammability of Materials
The JA37-201 complies with the requirements of RTCA/DO-160G Sec 26.3.3 "Flammability", by design. The JA37-
201 has an enclosure constructed of metal on all sides, and has no vent holes.

Rev A Page 4
JA37-201 Aural Message Generator - 6 Channel
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 JA37-201 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
This product manufactured by JAC is warranted to be free of defects in workmanship or performance for 2 years from
the date of installation by an approved JAC dealer or agency. This warranty covers the cost of all materials 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 due to abuse, misuse, accident, or unauthorized alteration or repairs.
THIS WARRANTY IS VOID IF THE PRODUCT IS NOT INSTALLED BY AN AUTHORIZED JAC DEALER. If the on-
line warranty card is not completed, the product will be warranted from the date of manufacture.
Contact JAC for return authorization, and for any questions regarding this warranty and how it applies to your unit(s).
JAC is the 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.
WARNING: The messages are intended only to supplement, NOT replace, airframe messages such
as ‘low rotor RPM’, ‘engine out’ or ‘decision height alerting’. The message audio feature is intended
for use as a secondary alerting system where another device provides the primary annunciation.
2.4.1 Installation Limitations
The JA37 may be installed only by following the applicable airworthiness requirements.

JA37-201 Aural Message Generator - 6 Channel
Installation and Operating Manual
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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.
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.
Unless otherwise noted, all wiring shall be a minimum of 24 AWG, except power and ground lines, which shall be a
minimum of 22 AWG. 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 JA37-201 can be mounted in any attitude and location with adequate space and sufficient clearance for the
connector and wiring harness. It requires no direct cooling.
2.4.4 Post Installation Checks
2.4.4.1 Voltage/Resistance checks.
Do not attach this unit until the following conditions are met:
a) Check P1 and P3 pin 1for +28 Vdc or +14 Vdc relative to ground.
b) Check P1 and P3 pin 14 for continuity to ground (less than 0.5 Ω).
c) Check P1 and P3 pin 18 for continuity to ground (less than 0.5 Ω) when the relevant switch is closed.
d) Check all pins for shorts to ground or adjacent pins.
2.4.4.2 Configuration
Ensure that the JA37 contains the correct configuration settings. This may be done at the factory, on the maintenance
bench or in the aircraft before the power on checks are performed. Refer to section 2.5.1.
2.4.4.3 Power on Checks.
Power up the aircraft’s systems and confirm normal operation of all functions of the JA37.
a) Check that all configuration 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 System Operation
Many of the System Operation parameters are configured using ProCS™ (see section 2.6).
2.5.1 Configuration Operation
The JA37-201 accepts configuration commands on the Configuration connector via the configuration cable(s) and the
configuration tool (ProCS™) – refer to section 2.6.

JA37-201 Aural Message Generator - 6 Channel
Installation and Operating Manual
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2.5.2 Message Mute Operation
The JA37-201 stops playing all messages if the MESSAGE MUTE input is activated while any MESSAGE TRIGGER
input is active (or when Power On Self-Test is occurring) and stays muted until the next message trigger event.
2.5.3 Message Operation
The JA37-201 Message 1, Message 2 and Message 3audio signal playback mode are individually selectable
between Continual and One-Shot. Message playback may also be configured for Priority operation, see section 2.5.5 –
Priority Operation.
When a message is configured as One Shot, the complete Message audio signal is routed to the phones output once
when the corresponding Message Trigger is active. When a message is configured as Continual, the Message audio
signal is routed to the phones output for the duration of the trigger input being active.
2.5.4 Power On Self-Test Operation
When the JA37-201 power is off and then POWER INPUT is applied, the three messages will play in the following
order: message 1; message 2; message 3. The Power On Self-Test messages may be muted at any time using the
MESSAGE MUTE input. See section 2.5.2.
2.5.5 Priority Operation
When Message Trigger Priority is selected (see Message Trigger Priority in section 2.6.3.1), if more than one trigger
is active, the messages will have the following priority: message 1; message 2; message 3. Note that if a higher
priority message has been triggered and is set as continual, the lower priority messages will not play until the higher
priority trigger is no longer active.
2.5.6 Non-Priority Operation
When Message Trigger Priority is not selected ('Equal Priority' in ProCS™) if more than one trigger is active, the
messages will play simultaneously (both Continual and One-Shot messages).
2.5.7 RX Audio Operation
The RX 1 and 2 Audio is level controlled and summed with the Message audio and routed to the Phones 1 and 2, Low
Isolation 1 and 2 outputs.
2.6 Adjustments and Configuration using ProCS™
All the JA37-201 internal adjustments are set from the Product Configuration Software ProCS™. Configuration data is
sent to the JA37-201 via the configuration connector 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.
2.6.1 Configuration Cabling Requirements
To configure the JA37-201, 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 JA37-201 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

JA37-201 Aural Message Generator - 6 Channel
Installation and Operating Manual
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Cabling option 2:
Quantity Description JAC Part #
1 USB A Male to RS232 3.5mm Plug CAB-USB-0006
2.6.2 ProCS™ Setup
Note: The JA37-201 consists of two JA37-001 units installed in a single box, each with a configuration jack.
Each section of the unit is configured separately using the JA37-001 ProCS menu.
The upper section of the
JA37-201 (connector J1) is
configured via configuration
jack J2.
The lower section of the
JA37-201 (connector J3) is
configured via configuration
jack J4.
The ProCS™ JA37-001 menu item 'ProCS Setup' provides Setup drawings showing the cabling arrangement
for connecting each section of the JA37-201 to a computer running the ProCS™.
2.6.3 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 JA37-201, power must be applied to each unit.
Within ProCS™, the JA37-001 configurable settings are grouped together into the following sections:
2.6.3.1 JA37-201 Configurable Pins Function Select
Several of the connector pins can be configured to meet the requirements of specific installations. Refer to the
JA37-201 Interconnect.Other configuration options may be unavailable, depending upon the selections made.