trig TT21 Installation Manual
Mode s transponder
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Summary of Contents for trig TT21
- Page 1 TT21 Mode S Transponder Installation Manual 00560-00-AA 19 January 2009 Trig Avionics Limited Heriot Watt Research Park Riccarton, Currie EH14 4AP Scotland, UK Copyright Trig Avionics Limited, 2009...
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Page 3: Table Of Contents
..................7 RANSPONDER OUNTING ......................7 OOLING EQUIREMENTS TT21 T ..............8 RANSPONDER LECTRICAL ONNECTIONS 5.5.1 TT21 Interface – Pinout....................8 TT21 T ................9 RANSPONDER NTERFACE ETAILS 5.6.1 Power Input ........................9 5.6.2 TMAP Bus......................... 9 5.6.3 Power On.......................... 9 5.6.4... - Page 4 TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA TC20 C ..............10 ONTROLLER LECTRICAL ONNECTIONS 5.7.1 TC20 Interface - Pinout....................10 TC20 C ................10 ONTROLLER NTERFACE ETAILS 5.8.1 TMAP Bus........................10 5.8.2 Altitude Out ........................11 5.8.3 Remote ON........................
- Page 5 TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA ....................22 LTITUDE NCODER ................22 ENERAL EMPERATURE PERATION ......................22 ARNING ESSAGES ......................22 AULT NNUNCIATION CONTINUED AIRWORTHINESS .................... 24 LIMITED WARRANTY ......................25 ENVIRONMENTAL QUALIFICATION FORMS .............. 26 ADS-B COMPLIANCE ......................
- Page 6 TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA This page intentionally left blank ______________________ Trig Avionics Limited...
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Page 7: Preface
This document applies to the installation of the TT21 Mode S Transponder. At the publication date of this manual the software version identifier for the TT21 is 1.1 and the FPGA version identifier is 1.1. The TC20 controller software version identifier is 1.1. The software and FPGA versions are subject to change without notice. -
Page 8: Introduction
2. Introduction 2.1 TT21 Description The TT21 Mode S transponder system is an ED-73B Class 2 compliant Mode S level 2 datalink transponder, with support for extended squitter, which also meets the relevant environmental requirements of ED-14D. It is certified to ETSO 2C112b and ETSO C166a. -
Page 9: Technical Specifications
TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA 3. Technical Specifications 3.1 TT21 Transponder Unit (00675-00) Specification Characteristics Compliance ETSO 2C112b Class 2 Level 2es, ETSO C166a Class B0 FCC Identification VZI00675 Applicable documents EuroCAE ED-73B, EuroCAE ED-14E (RTCA DO-160E),... -
Page 10: Tc20 Control Unit (00649-00)
TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA 3.2 TC20 Control Unit (00649-00) Specification Characteristics Compliance ETSO 2C112b, ETSO C88a Applicable documents EuroCAE ED-73B, EuroCAE ED-14E (RTCA DO-160E), RTCA DO-181D, SAE 8003 Software ED-12B (RTCA DO-178B) Level B... -
Page 11: Unit And Accessories Supplied
TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA 4. Unit and Accessories supplied 4.1 TT21 Mode S Transponder Items The TT21 Mode S transponder includes the following items: Unit Description Part Number TT21 Mode S Transponder 00675-00 TT21 Mounting Tray 00667-00 4.2 TC20 Controller Items... -
Page 12: Required Items
19 January 2009 00560-00 Issue AA 4.4 Required Items Additional items you will require, but which are not in the TT21 package, include: Antenna and fixing hardware. The TT21 is compatible with any transponder antenna approved to ETSO C74 or 2C112. -
Page 13: Installation
4-40. 5.3 Transponder Main Unit Mounting The TT21 Mode S transponder is designed to be mounted in any convenient location in the cockpit, the cabin, or an avionics bay. The following installation procedure should be followed, remembering to allow adequate space for installation of cables and connectors. -
Page 14: Tt21 Transponder Electrical Connections
Issue AA provided. 5.5 TT21 Transponder Electrical Connections The TT21 has a single 25 way female socket which provides the data and power inputs to the transponder. A single TNC coaxial connector attaches to the antenna. 5.5.1 TT21 Interface – Pinout... -
Page 15: Tt21 Transponder Interface Details
A and B, both of which must be connected for communication to work. There are two sets of TMAP pins on the TT21, TMAP1 A and B, and TMAP2 A and B. This is to support future installation wiring options. The two sets are identical, and either pair (TMAP1 or TMAP2) may be used to connect to the control head. -
Page 16: External Standby Input
RS232 input to the transponder. The ADS-B features are optional – no GPS is required for normal Mode S Elementary Surveillance. The TT21 GPS input can recognise the industry standard “Aviation” format, the NMEA 0183 format, or the format used by certain Freeflight and NexNav GPS sensors; the interface speed can be selected between 4800, 9600 and 19200 bps. -
Page 17: Altitude Out
Tug gently to confirm the contact is locked in place. 5.10 Wiring Considerations The connection from the TT21 transponder to the TC20 uses a minimum of six (6) signal lines; the TMAP pair, the Power and Ground pair, and the Remote On discrete line plus associated ground line. -
Page 18: Antenna Installation
A variety of proprietary mesh and grid solutions are available. Heavyweight cooking foil meets the technical requirements, but obviously needs to be properly supported. 5.11.2 Antenna Cable The TT21 is designed to meet Class 2 requirements with an allowance of 2 dB for loss in the ______________________ Page 12... - Page 19 – subject to the limits identified above, the TT21 can be at any distance from the control head without affecting performance in any way. NOTE: Low loss cable typically uses foamed or cellular dielectrics and foil screens. These make such cables especially prone to damage from too-tight bends or from momentary kinking during installation.
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Page 20: Tnc Connector
TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA 5.11.3 TNC Connector This section describes the technique for attaching the antenna cable to the supplied TNC connector. If a low-loss cable is needed that has too large a dielectric diameter to fit the supplied connector, a short length (up to 150mm or 6 inches) of smaller cable may be used with suitable mating connectors to adapt to the transponder connector. - Page 21 TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA The following diagram shows the general arrangement, although other combinations may be used: For aircraft with ¼ inch static lines, two adapters are provided which can convert from ¼ inch inside diameter hoses to the 5 mm hose in the install kit.
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Page 22: Installation Setup And Test
Issue AA 6. Installation Setup and Test The TT21 uses a simple setup system to program important system parameters, including the Mode S address. In the original factory configuration, the setup screen is the first thing that runs when you switch on the transponder. -
Page 23: Airspeed Category
On the ground, ADS-B transmits encoded aircraft size information which is used by ATC to identify taxiing routes and potential conflicts. When configured for ADS-B, the TT21 will ask for the aircraft length and width (wingspan), in metres, and will calculate the appropriate size code for transmission. -
Page 24: Ads-B Test Message Options
The purpose of these exercises is to present a changing load on the power lines from the TT21. If you suspect a potential problem with the wiring to the controller, it is worth monitoring the displayed voltage for several seconds to find the worst-case reading. - Page 25 Note: DO NOT EXCEED THE ALTITUDE OR RATE OF CLIMB LIMITS OF THE PITOT- STATIC INSTRUMENTS OF THE AIRCRAFT. The Trig altitude encoder is a solid state device and will not be affected by excess altitude or rate of climb and descent, but the mechanical instruments in the aircraft can easily be damaged by being driven beyond their intended range.
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Page 26: Post Installation Checks
TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA 7. Post Installation Checks Post installation checks should be carried out in accordance with your certification requirements. These checks should include: Mode S interrogations to verify correct address programming. -
Page 27: Normal Operation
TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA 8. Normal Operation 8.1 Overview On the front panel is a monochrome LCD display flanked by a rotary mode selector knob (OFF, SBY, GND, ON, and ALT) and a continuously rotating knob used for code and data entry. -
Page 28: Code Selector Knob
8.7 General Low Temperature Operation The TT21 is certified to operate correctly down to -20°C, but at low temperatures the display may be impaired. On a cold day you may need to wait for the cockpit to warm up to ensure normal operation. -
Page 29: ______________________
TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA Note the FAULT message shown on the screen and pass that information to your avionics maintenance organisation. ______________________ Trig Avionics Limited Page 23... -
Page 30: Continued Airworthiness
Issue AA 9. Continued Airworthiness Other than for periodic functional checks required by the regulations, the TT21 Mode S transponder has been designed 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. -
Page 31: Limited Warranty
Heriot Watt Research Park Riccarton, Currie, 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... -
Page 32: Environmental Qualification Forms
TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA 11. Environmental Qualification Forms Nomenclature TT21 Mode S Transponder Part Number: 00675-(XX) ETSO: 2C112b, C166a Manufacturer Trig Avionics Limited Address Heriot Watt Research Park, Riccarton, Currie, Scotland, EH14 4AP Conditions... -
Page 33: ______________________
TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA Nomenclature TC20 Mode S Controller Part Number: 00649-(XX) ETSO: 2C112b, C88a Manufacturer Trig Avionics Limited Address Heriot Watt Research Park, Riccarton, Currie, Scotland, EH14 4AP Conditions DO-160E Description of Conducted Tests... -
Page 34: Ads-B Compliance
TT21 transponders include support for Extended Squitter ADS-B out. The TT21 is a DO-260A change 2 compliant category B0 broadcast-only participant. 12.1 ADS-B Parameters Supported The following table lists the ADS-B parameters that are transmitted by the TT21 transponder when connected to an appropriate GPS receiver. Parameter... -
Page 35: Amc 20-24 Compliance
ADS-B output system in the transponder. At the publication date of this manual, the only commercially available GPS receivers we are aware of that can be used with the TT21 to meet the system requirements of AMC20-24 are the Freeflight 1201 and the NexNav 3101. -
Page 36: Installation Drawings
TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA 13. Installation Drawings 13.1 Mounting tray fixing and overall dimensions All dimensions in millimetres ______________________ Page 30 Trig Avionics Limited... -
Page 37: ______________________
TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA 13.2 Front Panel Controller Dimensions Controller shown without the mounting adapters (00678-00) used for 57mm (2¼ inch) instrument mounting. All dimensions in millimetres. ______________________ Trig Avionics Limited Page 31... -
Page 38: Front Panel Cut-Out Options
TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA 13.3 Front Panel Cut-out Options The front panel controller can be fitted to either the compact mounting hole or a conventional 57mm (2¼ inch) instrument cut-out. The compact mounting is a truncated 58 mm opening;... -
Page 39: Basic Interconnect Diagram
TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA 14. Basic Interconnect Diagram ______________________ Trig Avionics Limited Page 33... -
Page 40: ______________________
TT21 Transponder Installation Manual 19 January 2009 00560-00 Issue AA This page intentionally left blank ______________________ Page 34 Trig Avionics Limited...
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