Avidyne AXP340 MODE S User manual

AXP340 MODE S TRANSPONDER
INSTALLATION MANUAL

AXP340 Transponder Installation Manual 10 March 2014
01201-00 Issue AF
______________________
AVIDYNE CORPORATION i
This document is applicable to the Avidyne AXP340 Mode S Transponder.
For technical support, please contact Avidyne using the following information.
888-723-7592
781-402-7592
[e-mail]
All materials copyrighted, including images that represent this software.
Copyright 2013 Trig Avionics Limited.
Parts of this document Copyright 2013 Avidyne Corporation.
All rights reserved.
The latest installation manuals are available to authorized dealers on the web at
www.avidyne.com.

AXP340 Transponder Installation Manual 10 March 2014
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CONTENTS
1. PREFACE.......................................................................................................................................1
1.1 PURPOSE....................................................................................................................................1
1.2 SCOPE........................................................................................................................................1
1.3 CHANGES FROM PREVIOUS ISSUE ..............................................................................................1
1.4 DOCUMENT CROSS-REFERENCES ..............................................................................................1
2. INTRODUCTION ..........................................................................................................................2
2.1 AXP340 DESCRIPTION ..............................................................................................................2
2.2 INTERFACES...............................................................................................................................2
3. TECHNICAL SPECIFICATIONS ...............................................................................................4
3.1 REGULATORY ............................................................................................................................4
3.1.1 Approved Deviations ........................................................................................................4
3.2 PHYSICAL SPECIFICATIONS (IN TRAY)........................................................................................4
3.3 INSTALLATION APPROVAL.........................................................................................................5
3.4 TSO FAILURE CONDITION CLASSIFICATION...............................................................................5
3.5 NON –TSO FUNCTIONS.............................................................................................................5
4. UNIT AND ACCESSORIES SUPPLIED.....................................................................................6
4.1 AXP340 MODE STRANSPONDER ITEMS ...................................................................................6
4.2 MOUNTING TRAY,INSTALLATION KIT ........................................................................................6
4.3 DOCUMENTATION......................................................................................................................6
4.4 REQUIRED ITEMS.......................................................................................................................6
5. INSTALLATION............................................................................................................................8
5.1 UNPACKING AND INSPECTING EQUIPMENT ................................................................................8
5.2 MOUNTING ................................................................................................................................8
5.3 COOLING REQUIREMENTS..........................................................................................................8
5.4 ELECTRICAL CONNECTIONS.......................................................................................................8
5.4.1 Primary Interface –Pinout...............................................................................................9
5.4.2 Secondary Interface - Pinout..........................................................................................10
5.4.3 Orientation Diagram ......................................................................................................10
5.5 INTERFACE DETAILS................................................................................................................11
5.5.1 Power Input ....................................................................................................................11
5.5.2 Lighting Bus Input ..........................................................................................................11
5.5.3 Mutual Suppression ........................................................................................................11

AXP340 Transponder Installation Manual 10 March 2014
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5.5.4 Altitude Inputs and Output ............................................................................................. 11
5.5.5 Squat Switch Input..........................................................................................................12
5.5.6 Ident Switch Input...........................................................................................................12
5.5.7 External Standby Input...................................................................................................12
5.5.8 Audio Output ..................................................................................................................12
5.5.9 Altitude Alerter Output ...................................................................................................13
5.5.10 GPS Position Input.........................................................................................................13
5.6 MOLEX CRIMP TERMINALS......................................................................................................14
5.7 ANTENNA INSTALLATION.........................................................................................................15
5.7.1 Antenna Cable ................................................................................................................15
5.7.2 BNC Connector...............................................................................................................17
5.8 TRAY /BNC CONNECTOR ASSEMBLY.....................................................................................19
6. INSTALLATION SETUP AND TEST .......................................................................................20
6.1 CONFIGURATION ITEMS ...........................................................................................................20
6.1.1 Aircraft Registration.......................................................................................................20
6.1.2 Aircraft Address Programming ......................................................................................20
6.1.3 VFR Squawk Code..........................................................................................................21
6.1.4 Airspeed Category..........................................................................................................21
6.1.5 Aircraft Category............................................................................................................21
6.1.6 Squat Switch Source .......................................................................................................21
6.1.7 GPS Input .......................................................................................................................21
6.1.8 GPS Line Speed ..............................................................................................................21
6.1.9 GPS System Certification Level......................................................................................21
6.1.10 GPS NACv ......................................................................................................................22
6.1.11 Aircraft Length and Width..............................................................................................22
6.1.12 GPS Antenna Offset........................................................................................................22
6.1.13 ADS-B Receiver Options.................................................................................................22
6.1.14 Audio Volume .................................................................................................................22
6.1.15 Pressure Altitude Units...................................................................................................22
6.1.16 Lighting Control .............................................................................................................23
6.1.17 LCD Dim Point...............................................................................................................23
6.1.18 LCD Brightness ..............................................................................................................23
6.2 TEST ITEMS..............................................................................................................................23
6.2.1 Interface Check...............................................................................................................23
6.2.2 Altitude Check.................................................................................................................23

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6.2.3 Lighting Bus....................................................................................................................23
6.2.4 Temperature....................................................................................................................23
6.2.5 GPS Interface .................................................................................................................24
7. POST INSTALLATION CHECKS.............................................................................................25
8. NORMAL OPERATION.............................................................................................................26
8.1 OVERVIEW............................................................................................................................... 26
8.2 FRONT PANEL..........................................................................................................................26
8.3 DISPLAY ..................................................................................................................................26
8.4 POWER ON/OFF...................................................................................................................26
8.5 MODE CONTROL.................................................................................................................26
8.6 IDENT....................................................................................................................................27
8.7 VFR ........................................................................................................................................27
8.8 FUNC .....................................................................................................................................27
8.9 SELECTOR KNOB .....................................................................................................................27
8.10 NUMERIC BUTTONS.................................................................................................................27
8.11 CLR ........................................................................................................................................27
8.12 SQUAWK CODE ENTRY.............................................................................................................27
8.13 FLIGHT TIMER .........................................................................................................................28
8.14 STOPWATCH ............................................................................................................................28
8.15 FLIGHT ID ENTRY ....................................................................................................................28
8.16 ALTITUDE MONITOR................................................................................................................28
8.17 ADS-B MONITOR....................................................................................................................28
8.18 ALERT MESSAGES ...................................................................................................................28
8.19 FAULT ANNUNCIATION............................................................................................................29
8.20 LOW TEMPERATURE OPERATION.............................................................................................29
9. CONTINUED AIRWORTHINESS.............................................................................................30
10. ENVIRONMENTAL QUALIFICATION FORM.................................................................31
11. ADS-B COMPLIANCE............................................................................................................33
11.1 ADS-B PARAMETERS SUPPORTED...........................................................................................33
11.2 FAA 91.227 COMPLIANCE.......................................................................................................33
11.3 AMC 20-24 COMPLIANCE .......................................................................................................33
11.4 AUTOMATIC AIR/GROUND DETERMINATION ...........................................................................33
11.5 ADS-B SUPPORT.....................................................................................................................33

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12. INSTALLATION DRAWINGS...............................................................................................35
13. BASIC INTERCONNECT DIAGRAM..................................................................................36
14. AVIDYNE EXCLUSIVE LIMITED WARRANTY AND LIMITATIONS ON LIABILITY37
15. SOFTWARE LICENSE...........................................................................................................39

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1. Preface
1.1 Purpose
This manual describes the physical and electrical characteristics and the installation requirements for an
AXP340 Mode S Transponder.
1.2 Scope
This document applies to the installation of the AXP340 Mode S Transponder.
At the publication date of this manual the software version identifier for the AXP340 is 3.8 and the FPGA
version identifier is 110613a. The software and FPGA versions are subject to change without notice.
1.3 Changes from Previous Issue
Updated section 4 to reflect the Avidyne part numbers and kit combinations
Corrected version numbering for updated documents
Added KT76C to the list of equivalent transponder trays
Added statement in 6.1.1 about automated Mode S address generation for N reg. aircraft
1.4 Document Cross-References
600-00302-000
AXP340 Mode S Transponder Pilot Guide
02

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2. Introduction
2.1 AXP340 Description
The AXP340 Mode S panel mount transponder is an ED-73E and DO-181E Class 1 compliant Mode S
level 2es datalink transponder, with support for extended squitter, elementary surveillance and SI codes.
The AXP340 is also a DO-260B Class B1S compliant ADS-B out participant. The AXP340 meets the
relevant environmental requirements of DO-160G/ED-14G, and is certified to ETSO C112d, ETSO C166b,
TSO C112d and TSO C166b.
The AXP340 transmitter power output is nominally 240 watts, and the transponder runs from either 14 volt
nominal or 28 volt nominal DC power supply with no configuration changes required.
The AXP340 transponder responds to both legacy Mode A/C interrogations and to Mode S interrogations
from both ground radar and airborne collision avoidance systems. In all cases, the interrogations are
received by the transponder on 1030MHz, and replies are transmitted on 1090MHz.
In the Mode S environment, S stands for Select, and a Mode S interrogator can selectively address a single
transponder. This allows accurate position plotting with lower reply rates, which in turn reduces frequency
congestion and interference. As a side benefit, power consumption by the transponder may be reduced, and
simple datalink services can be supported, such as ADS-B. It is however crucial to the reliable operation of
the system that each aircraft has a distinct Mode S address. The Mode S address is allocated by the
registration authority for the aircraft, and must be set when the AXP340 is installed.
2.2 Interfaces
At the rear, the transponder has two Molex style connectors and a single antenna connector for blind mating
with the corresponding connectors in the mounting tray.
The interfaces provide the following services:
Parallel altitude input
Connection to an external altitude encoder using parallel Gray code.
Serial altitude input
Connection to an external RS232 altitude encoder or air data computer. Using
serial altitude data allows the transponder to report altitude with 25 foot
resolution.
Serial altitude output
Connection to a GPS or other device needing serial altitude data –this allows the
transponder to act as a repeater instead of requiring a second altitude encoder.
Ident input
External IDENT switch input.
Standby input
External standby input for dual transponder installations.
“On ground” input
Allows automatic flight/ground mode switching for aircraft with a squat switch.
Lighting bus input
Used to adjust the backlight and switch lighting intensity.
DME Suppression
Input
Input to limit interference between DME interrogations and transponder replies –
suppresses transponder whilst active.
Suppression bus I/O
ARINC compatible suppression bus signal used in aircraft with more sophisticated
suppression needs, both an input to and output from the transponder.
Audio output
Optionally used by the altitude monitor function.
Audio mute input
Toggle function to mute the audio output.

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Altitude alert output
Output used to signal altitude deviations when optional altitude monitor function
is used.
GPS Input
Connection to a GPS supplying position input for ADS-B position reporting.