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TN72 TABS GPS Receiver Installation Manual

5 January 2018

01691-00

Issue AG

______________________

Trig Avionics Limited

1

1. Preface

1.1 Purpose

This manual describes the physical and electrical characteristics and the
installation requirements for a TN72 TABS GPS Receiver and recommends the
configuration settings for the associated transponder.

1.2 Scope

This document applies to the installation of the TN72 TABS GPS Receiver.
Information about configuration of Trig transponders is included, but for full
installation data on the transponder please use the applicable transponder
installation manual.

1.3 Changes from Previous Issue

Section 3.1

Added ETSO C199 Certification

Section 4.3

Corrected error in antenna specification

Section 6.1.1

Added SDA information

Section 13

Updated diagram to include TT31

1.4 Document Cross-References

00455-00

TT31 Transponder Installation Manual

AR

00560-00

TT21/TT22 Transponder Installation Manual

AQ

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Summary of Contents for TN72

Page 1: ...TN72 TABS GPS Receiver Installation Manual 01691 00 AG 5 January 2018 Trig Avionics Limited Heriot Watt Research Park Riccarton Edinburgh EH14 4AP Scotland UK Copyright Trig Avionics Limited 2016 ...

Page 2: ...This page intentionally left blank ...

Page 3: ...RODUCTION 2 2 1 TN72 DESCRIPTION 2 2 2 INTERFACES 2 3 TECHNICAL SPECIFICATIONS 3 3 1 TN72 GPS RECEIVER UNIT 01655 00 3 3 2 INSTALLATION APPROVAL 3 3 3 INCOMPLETE TSO ARTICLE 4 4 UNIT AND ACCESSORIES SUPPLIED 5 4 1 TN72 GPS RECEIVER ITEMS 5 4 2 INSTALLATION KIT 5 4 3 REQUIRED ITEMS 5 5 INSTALLATION 7 5 1 UNPACKING AND INSPECTING EQUIPMENT 7 5 2 GPS RECEIVER MOUNTING 7 5 3 COOLING REQUIREMENTS 7 5 4...

Page 4: ... 7 WIRING CONSIDERATIONS 10 5 8 ANTENNA INSTALLATION 10 5 8 1 Antenna Power 10 5 8 2 Recommended Cable 10 5 8 3 QMA Connector 11 6 INSTALLATION SETUP AND TEST 13 6 1 CONFIGURATION ITEMS 13 6 1 1 GPS Input 13 6 1 2 GPS TIS Line Speed 13 6 1 3 GPS Certification Level 14 6 1 4 GPS NAC velocity 14 6 1 5 GPS Antenna Offset 14 6 1 6 1090 MHz Receiver Installed 14 6 1 7 UAT Receiver Installed 15 7 POST I...

Page 5: ...1691 00 Issue AG ______________________ Trig Avionics Limited iii 11 ADS B COMPLIANCE 21 11 1 TSO C199 TABS COMPLIANCE 21 11 2 FAA 91 227 COMPLIANCE 22 11 3 CS ACNS COMPLIANCE 22 11 4 ADS B SUPPORT 22 12 INSTALLATION DRAWINGS 23 13 BASIC INTERCONNECT DIAGRAM 24 ...

Page 6: ...TN72 TABS GPS Receiver Installation Manual 5 January 2018 01691 00 Issue AG ______________________ iv Trig Avionics Limited This page intentionally left blank ...

Page 7: ...t applies to the installation of the TN72 TABS GPS Receiver Information about configuration of Trig transponders is included but for full installation data on the transponder please use the applicable transponder installation manual 1 3 Changes from Previous Issue Section 3 1 Added ETSO C199 Certification Section 4 3 Corrected error in antenna specification Section 6 1 1 Added SDA information Sect...

Page 8: ...liant solution for those aircraft The TN72 can also be fitted to any aircraft operating outside ADS B mandated airspace to enhance traffic situational awareness The TN72 provides a position source with TSO Design Assurance and non zero quality indicators for interoperability with all kinds of traffic receivers Under certain circumstances the TN72 can also be used to satisfy the position source req...

Page 9: ... SBAS capability Tracking Sensitivity 135 dBm Physical Specifications including mounting flange Height 30mm 1 2 Width 80mm 3 1 Length 75mm 2 9 Weight 0 22lbs 110 g 3 2 Installation Approval The conditions and tests required for the TSO approval of the TN72 TABS GPS Receiver are minimum performance standards It is the responsibility of those desiring to install this receiver on or within a specific...

Page 10: ...nics Limited 3 3 Incomplete TSO article The TN72 is a remote mount TSO C199 compliant class B position source As such the following functional requirements from TSO C199 Appendix 1 are not implemented A1 2 7 1 Antenna Requirements A1 2 7 2 Antenna Installation A1 2 7 3 Antenna Hazards A1 2 8 2 Battery Operation ...

Page 11: ...2 Installation Manual 1 01691 00 Connector Co axial QMA 1 01697 00 Headshell 9 Way 1 00725 00 9 way D type contact housing female 1 00727 00 Crimp Terminal Female 22 24 AWG 9 00730 00 4 3 Required Items Additional items you will require but which are not in the TN72 package include Antenna and fixing hardware The TN72 is compatible with any GPS antenna approved to ETSO C190 or C144a the recommende...

Page 12: ...ed Fixings To secure the GPS receiver to the airframe you will need 4 flat head screws and four self locking nuts If the aircraft does not have existing mounting provisions you may need to fabricate additional brackets to support the GPS receiver To complete the ADS B Out solution you will need an appropriate transponder ...

Page 13: ...ce for installation of cables and connectors Select a position in the aircraft that is not too close to any high external heat source The TN72 is not a significant heat source itself and does not need to be kept away from other devices for this reason Avoid sharp bends and placing the cables too near to the aircraft control cables Secure the unit to the aircraft using four screws and locking nuts ...

Page 14: ...RS 422 A Output 4 One PPS RS 422 B Output 5 Ground 6 RS232 Control Input 7 Position Out Output 8 Reserved 9 Reserved 5 5 TN72 GPS receiver Interface Details 5 5 1 Power Input The power supply can be 11 33 Volts DC no voltage adjustment is required Use a 1 Amp circuit breaker for power supply protection to the TN72 5 5 2 GPS Position Output The GPS position output is an RS 232 compatible port opera...

Page 15: ...nform to MIL part number M39029 63 368 and are also suitable for wire gauges from 20 to 24 AWG These contacts are widely used in avionics installation and there are many tools available on the market that will reliably crimp them to the wiring Because the contacts are a MIL standard there is also a MIL standard for the crimp tool although other proprietary solutions are also available The MIL refe...

Page 16: ...ns are very important The antenna should not be mounted close to VHF COM transmitter antennas and other antennas emitting high power Special care should be taken to ensure that the GPS antenna is not mounted in close proximity to antennas that may emit harmonic interference at the L1 frequency of 1575 42 MHz Refer to AC 20 138C Airworthiness Approval of Global Navigation Satellite System GNSS Equi...

Page 17: ...wn in the diagram below Slide 25 mm 1 inch of heat shrink tubing over the cable Slide the outer crimp sleeve over the cable it must go on before securing the centre contact Dimension Cut size mm Cut size inches A 12 0 47 B 3 7 0 14 C 2 0 08 Solder the centre contact to the cable heat contact using a dry soldering iron flow a small amount of solder into the bore hole of the contact insert cable and...

Page 18: ...r Installation Manual 5 January 2018 01691 00 Issue AG ______________________ 12 Trig Avionics Limited Crimp the outer sleeve over the shield Slide heat shrink tubing forward flush to connector and heat to shrink the tubing ...

Page 19: ...MEA encoded position and velocity data as well as additional integrity information used for TSO C199 compliance The transponder can therefore be configured to operate using the TN72 as an uncertified NMEA position source as a TSO C199 TABS position source or in certain circumstances as a FAR 91 227 compatible position source Select one of the following NMEA 0183 Transponder sends ADS B data SIL se...

Page 20: ... instead it reports the location of the GPS antenna not the GPS receiver In normal flight operations this distinction is of no practical importance at all but if ADS B is used to manage taxiway conflicts a significant offset in antenna position could mean that the aircraft is not in the same place as the ADS B reported position Although primarily intended for position correction on large transport...

Page 21: ... the volume of traffic they must send Set this to Yes if the aircraft has a UAT receiver installed 6 1 8 Squat Switch The TN72 is compatible with the GPS based automatic air ground determination system supported by certain Trig transponders If the aircraft has a physical squat switch it should be used for air ground determination If it does not the TN72 can be used to emulate a squat switch by sel...

Page 22: ... ADS B diagnostic screen is displayed It will initially display dashes for the position fix After two minutes the GPS should have obtained a position fix and a position corresponding to the aircraft location should be displayed Where configured verification of correct squat switch ground airborne indications In an aircraft with a squat switch setting the Mode switch to ALT when the aircraft is on ...

Page 23: ...signed and manufactured to allow on condition maintenance This means that there are no periodic service requirements necessary to maintain continued airworthiness and no maintenance is required until the equipment does not properly perform its intended function When service is required a complete performance test should be accomplished following any repair action Repairs should only be carried out...

Page 24: ...al wear All warranties are FCA Trig at Trig Avionics Limited Heriot Watt Research Park Riccarton Edinburgh EH14 4AP Trig Avionics will not accept or pay for any charges for warranty work performed outside our factory without prior written consent This warranty applies only to products in normal use It does not apply to units or circuit boards defective due to improper installation physical damage ...

Page 25: ...High temperature ground survival 4 5 3 85 C Loss of Cooling 4 5 5 Cooling air not required 70 C operating without cooling air Altitude 4 6 1 35 000 feet Decompression 4 6 2 8 000 to 35 000 feet in 15 seconds Overpressure 4 6 3 15000 feet Temperature Variation 5 0 Equipment tested to Category C Humidity 6 0 Equipment tested to Category A Operational Shocks 7 2 Equipment tested to Category A Crash S...

Page 26: ...S GPS Receiver Installation Manual 5 January 2018 01691 00 Issue AG ______________________ 20 Trig Avionics Limited Electrostatic Discharge 25 0 Equipment tested to Category A Fire Flammability 26 0 Category C ...

Page 27: ...ass B GPS position source and configured for TABS GPS operation all transmitted ADS B data complies with section A1 2 5 of TSO C199 When configured as TSO C199 position source with a Trig transponder the system will report Parameter Value Meaning Quality Indicator NIC Navigation Integrity Category 6 Radius of containment 926 metres Quality Indicator NACP Navigational Accuracy for Position 4 Dynami...

Page 28: ...ameter Value Meaning Quality Indicator NIC Navigation Integrity Category 7 Dynamic Radius of containment 370 4 metres Quality Indicator NACP Navigational Accuracy for Position 8 Dynamic Position Uncertainty 92 6 metres Quality Indicator NACV Navigational Accuracy Category for Velocity 1 10 m s Quality Indicator SIL Source Integrity Level 3 Error probability 1 x 10 7 11 3 CS ACNS Compliance The TN7...

Page 29: ...TN72 TABS GPS Receiver Installation Manual 5 January 2018 01691 00 Issue AG ______________________ Trig Avionics Limited 23 12 Installation Drawings All dimensions in millimetres ...

Page 30: ...TN72 TABS GPS Receiver Installation Manual 5 January 2018 01691 00 Issue AG ______________________ 24 Trig Avionics Limited 13 Basic Interconnect Diagram ...

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