TY91/TY92 VHF Radio Installation Manual
Contents
1. 11 Reserved Reserved Reserved The following diagram shows the connector orientation as viewed from the wiring side 1 8 ee00000 0000000 9 15 Trig Avionics Limited 23 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 5 8 TC90 Controller Interface Details 5 8 1 TMAP Bus TMAP is a Trig proprietary bus based on RS485 signalling It provides a bi directional interface between the VHF radio and the control head Each TMAP interface comprises a balanced pair of signals called A and B both of which must be connected for communication to work TMAP A and B lines on the controller should be connected to the corresponding A and B lines of either TMAPI or TMAP2 on the TY91 TY92 5 8 2 RS232 Input The RS232 input allows certain GPS receivers to preload the standby and active frequencies The TC90 understands the Apollo SL40 protocol PMRRC based on NMEA at a speed of 9600 bps and responds to message types 1 4 5 and 6 The RS232 output can be used for status monitoring of the radio if required 5 8 3 Remote ON This output is connected directly to the Power Mode switch on the TC90 and should be connected to the Power ON discrete input of the TY91 TY92 5 8 4 Power The TC90 uses a regulated 12 volt supply which is provided by the TY91 TY92 VHF radio This input should NOT be connected to aircraft power it can be damaged by the voltage surges on the main power2. 13 1 5 6 TY91 TY92 VHF Radio Interface Details 5 6 1 Speaker Output The speaker output can drive a 4 ohm or 8 ohm cabin speaker The speaker should be rated at 4 watts or higher 5 6 2 TMAP Bus TMAP is a Trig proprietary bus based on RS485 signalling It provides a bi Trig Avionics Limited 19 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA directional interface between the VHF radio and the control head Each TMAP interface comprises a balanced pair of signals called A and B both of which must be connected for communication to work There are two sets of TMAP pins on the TY91 TY92 TMAPI A and B and TMAP2 A and On the TY91 and TY92 TMAPI and TMAP2 are wired together internally The two sets are identical and either pair TMAP1 or 2 may be used to connect to the control head 5 6 3 Headphone Output The headphone output is intended to drive one or two sets of 300 to 600 ohm headphones which may be connected in parallel or to drive a conventional 600 ohm audio panel input 5 6 4 Controller Power The TC90 controller does not connect to aircraft power it receives power from the TY91 TY92 using this output The TY91 TY92 provides 12 volts to the TC90 This output includes short circuit protection and no fuse is required between the TY91 TY92 and the TC90 5 6 5 Power On The TY91 TY92 power supply is controlled by this discrete input The input is active low so that
3. 20 C High temperature operating 55 C High temperature short time operating 70 C High temperature ground survival 85 C Loss of Cooling Cooling air not required 55 C operating without cooling air Altitude 55 000 feet Decompression 8 000 to 35 000 feet in 15 seconds Overpressure 15 000 feet Temperature Variation Equipment tested to Category C Humidity Equipment tested to Category A Operational Shocks Equipment tested to Category B Crash Safety Equipment tested to Category B type 5 Vibration Aircraft zone 2 type 3 4 5 to category S level M type 1 Helicopters to category U level G Explosion Trig Avionics Limited Equipment identified as Category X no test required 43 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Waterproofness Issue AA Equipment identified as Category X no test required Fluids Susceptibility Equipment identified as Category X no test required Sand and Dust Equipment identified as Category X no test required Fungus Equipment identified as Category X no test required Salt Spray Equipment identified as Category X no test required Magnetic Effect Equipment tested to Category Z Power Input Equipment tested to Category BX Voltage Spike Equipment tested to Category B Audio frequency
4. 22 5 7 1 TC90 Interface Pinout ii 23 5 8 TC90 CONTROLLER INTERFACE DETAILS eee 24 5 8 1 TMAP Businesses aaa 24 ii Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 00839 00 5 8 2 RS232 Input nia 5 8 3 Remote ON 5 8 4 Powers iaia ee tag 5 8 5 Step B tton deer 5 6 6 Transfer Button esce 5 9 D CONNECTOR CRIMP TERMINALS 5 10 WIRING CONSIDERATIONS 5 10 1 Interconnect esee 5 10 2 Audio wiring sse 5 11 ANTENNA INSTALLATION nn 5 11 1 Antenna Ground Plane 5 11 2 Antenna Cable esse 5 11 3 Connector eese 6 INSTALLATION SETUP AND TEST 6 1 INITIAL POWER ON ii 6 2 CONFIGURATION ITEMS 6 2 1 Intercom Volume eese 6 2 2 Intercom Squelch 6 2 3 Auxiliary Input Volume 6 2 4 Auxiliary Input Muting 6 2 5 Sidetone Volumte eese 6 2 6 Frequency Step Size iii 7 POST INSTALLATION CHECKS 8 NORMAL 0 744 01 0040 0 Trig Avionics Limited 11 April 2012 Issue AA lil TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 8 1 lla el cn 35 8 2 DISPLAY e sez este
5. conducted susceptibility Equipment tested to Category B Induced signal susceptibility Equipment tested to Category AC Radio frequency susceptibility Equipment tested to Category TT Radio frequency emission Equipment tested to Category B Lightning induced transient susceptibility Equipment tested to Category B2H22 Lightning direct effects Equipment identified as Category X no test required Icing Equipment identified as Category X no test required Electrostatic Discharge Equipment identified as Category X no test required Fire Flammability 44 Equipment identified as Category C Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Nomenclature Issue AA TC90 Radio Controller Part No 00857 00 01 ETSO 2C169a Manufacturer Trig Avionics Limited Address Conditions Temperature and Altitude Heriot Watt Research Park Riccarton Edinburgh Scotland EH14 4AP DO 160F Description of Conducted Tests Section Equipment tested to Categories A4 C4 Low temperature ground survival 55 C Low temperature short time operating 25 C Low temperature operating 20 C High temperature operating 55 C High temperature short time operating 70 C High temperature ground survival 85 C Loss of Cooling Cooling air not required 7
6. 10 volts ina TY91 or 18 volts in a TY92 3 5 Installation Approval The conditions and tests required for the TSO approval of the TY91 TY92 VHF radio are minimum performance standards It is the responsibility of those installing this VHF radio on or within a specific type or class of aircraft to determine that the aircraft operating conditions are within the TSO standards The VHF radio may be installed only if further evaluation by the user installer documents an acceptable installation that is approved by the appropriate airworthiness authority Trig Avionics Limited 13 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 4 Unit and Accessories supplied 4 1 TY91 VHF radio Items The TY91 VHF radio includes the following items Unit Description Part Number TY91 VHF radio 00882 00 01 TY91 TY92 Mounting Tray 00667 00 4 2 TY92 VHF radio Items The TY92 VHF radio includes the following items Unit Description Part Number TY92 VHF radio 00879 00 01 TY91 TY92 Mounting Tray 00667 00 4 3 TC90 Controller Items The TC90 controller includes the following items Unit Description Part Number TC90 VHF radio Controller 00857 00 01 TY91 TY92 Installation Kit 00864 00 4 4 Installation Kit The TY91 TY92 installation kit includes the following items 14 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA Unit Description Part Number TY91 TY
7. 67 EUROCAE ED 14F RTCA DO 160F RTCA DO 186B RTCA DO 207 Software ED 12B RTCA DO 178B Level B Hardware DO 254 Level C Power Requirements 22 33 volts DC Typical 2 8 watts 28volts receive typical 80 watts 28 volts transmit Maximum current 3 2A 10 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 00839 00 Altitude Humidity Operating Temperature Transmitter Frequency Transmitter Power Transmitter Modulation Stuck mic timeout Tranmitter Duty Cycle Receiver Frequency Receiver Sensitivity AGC Characteristic 11 April 2012 Issue AA 55 000 feet 95 50 C for 6 hours 85 38 C for 16 hours Tested to Category A in DO 160F 20 C to 55 C 118 000 MHz to 136 992 MHz 760 channels at 25 kHz spacing 2280 channels at 8 33 kHz spacing 16 watts nominal carrier power 5 6 A3E 35 seconds 50 duty cycle 35 seconds on followed by 35 seconds off 118 000 MHz to 136 992 MHz 760 channels at 25 kHz spacing 2280 channels at 8 33 kHz spacing lt 5uV for 6 dB SINAD 6dB variation 5 uV to 100 mV EMF Physical Specifications in the mounting tray Height Width Length Weight 48mm 1 9 66mm 2 5 160mm 6 3 0 7715 350 3 3 TC90 Control Unit 00857 00 01 Specification Characteristics Trig Avionics Limited 11 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA Compliance ETSO 2C169a TSO C169a
8. At the publication date of this manual the software version identifier for the TY91 TY92 is 1 0 and the FPGA version identifier is 1 0 The TC90 controller software version identifier is 1 0 The software and FPGA versions are subject to change without notice 1 3 Changes from Previous Issue None this is the first issue 1 4 Document Cross References 00840 00 TY91 VHF radio Operating Manual AA ETSO 2C169a Radio communication receiving equipment EASA operating within the radio frequency range 117 875 137 MHz TSO C169a Minimum Operational Performance standards for FAA Airborne Radio Communications equipment standards ETSO 2C128 Devices that prevent blocked channels used in EASA two way radio communications due to unintentional transmissions TSO C128a Equipment that prevents blocked channels used FAA Trig Avionics Limited 3 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA in two way radio communications due to unintentional transmissions 6 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 2 Introduction 2 1 TY91 TY92 Description The TY91 TY92 VHF radio system is an ED 23C compliant class C 25 kHz offset carrier and class E 8 33 kHz single carrier VHF radio The TY91 has a nominal power output of 6 watts and meets the power output requirements for Class 4 and Class 6 The TY92 has a nominal power output of 16 watts and meets
9. DATA OUT Blue Ground Controller Remote ON Power In Ground Reserved Step Key Transfer Key Reserved Reserved NOTES 1 ALLWIRES SHOULD BE 18 24 AWG A OUTPUT FORMAT SHOULD BE SET TO TIS IN NMEA amp VHF OUT or AVIATION IN NMEA amp VHF OUT Diagram 3 GPS Connection Page 54 Trig Avionics Limited This page intentionally left blank Trig Avionics Limited
10. away from sources of heat e Route the cable away from potential interference sources such as ignition wiring 400Hz generators fluorescent lighting and electric motors e Allow a minimum separation of 300mm 12 inches from an ADF antenna cable e Keep the cable run as short as possible Avoid routing the cable round tight bends e Avoid kinking the cable even temporarily during installation e Secure the cable so that it cannot interfere with other systems 5 11 3 TNC Connector This section describes the technique for attaching the antenna cable to the supplied TNC connector The supplied connector can be completed using a wide range of commercial crimp tools for example the Tyco 5 1814800 3 The die apertures for the inner pin and the outer shield should be approximately 1 72 mm and 5 41 mm respectively e Strip back the coax cable to the dimensions in the table as shown in the diagram below Slide 25 mm 1 inch of heat shrink tubing over the cable e Slide the outer crimp sleeve over the cable it must go on before Trig Avionics Limited 29 TY91 TY92 VHF Radio Installation Manual 00839 00 11 April 2012 Issue AA securing the centre contact Heat Shrink Tubing l om B Dimension Cut size Cut size mm inches A 17 5 0 69 B 7 2 0 28 C 4 8 0 19 e Crimp the centre contact to the cable e Insert the cable into the connector the centre contact sh
11. date of installation by an authorised dealer This warranty covers repair and or replacement at our option of any parts found to be defective provided such defects in our opinion are due to faulty material or workmanship and are not caused by tampering abuse or normal wear All warranties are F O B 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 tampering lightning or other electrical discharge units with altered serial numbers or units repaired by unauthorised persons or in violation of Trig Avionics Limited service procedures Trig Avionics Limited assumes no responsibility for any consequential losses of any nature with respect to any products or services sold rendered or delivered 40 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 11 Environmental Qualification Forms Nomenclature TY91 VHF radio Part No 00882 00 01 ETSO 2C169a Manufacturer Trig Avionics Limited Address Conditions Temperature and Altitude Heriot Watt Research Park Riccarton Edinburgh Scotland EH14 4AP DO 160F Description of Conducted Tes
12. following diagram is intended to be to scale however variations in the printing process mean that you MUST check all dimensions before using it as a template me Trig Avionics Limited 49 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA Note The following diagram is intended to be to scale however variations in the printing process mean that you MUST check all dimensions before using it as a template All dimensions in millimetres 50 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 13 Wiring Diagrams Diagram 1 TY91 TY92 Typical Interconnect Diagram 2 Audio Panel Connections Diagram 3 GPS Connection Trig Avionics Limited Page 51 TY91 TY92 VHF Radio Installation Manual 00839 00 Speaker GND Speaker OUT TMAP 1A TMAP 1B TC90 Power Power ON Ground TMAP 2A 2B TX Interlock Aux In Intercom PTT Reserved Reserved Reserved PIT2 1 MIC 1 In TY91 TY92 VHF Radio Phone Out phone Galo Dossi E DC Power DC Power Ground ANTENNA AN Page 52 T seven E A SL A Remote FREQUENCY STEP OPTIONAL T ele NERA ZL 5 Reuore Frequency 1 2 TRANSFER OPTIONAL 5 MIC2 KEY LINE MC2in ot do a Ca MIC KEY LINE 5A 20 AWG NOTE 2 Mic 2 Mic 1 PHONE 1 PHONE 2 gt E D
13. the TY91 TY92 will power up whenever the input is held low This signal is intended to connect to the TC90 Remote ON output 5 6 6 PTT1 2 Key Input Two Push to Talk PTT inputs are provided which correspond to the two microphone inputs Only the corresponding microphone input is routed to the transmitter when the key switch is pressed The PTTI input has priority over the PTT2 input if the PTT1 switch is closed when the PTT2 switch is closed the input from Microphone 1 is routed 20 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA to the transmitter The inputs are active low and will be asserted when the voltage to ground is pulled below approximately 4 volts The input should be connected to a momentary switch on the yoke or on the microphone 5 6 7 Intercom Key Input The intercom key switch input allows the intercom function to be selected using a remote switch or permanently enabled by grounding the pin inside the connector The input is active low and will be asserted when the voltage to ground is pulled below approximately 4 volts If this pin is tied low the intercom function depends on the vox operated squelch Note It is possible to combine both the key switch and the vox activation or to use only one To use only the switch wire the switch to the intercom key input and select the vox squelch to the lowest setting during configuration To use only the vox wir
14. the power output requirements for Class 3 and Class 5 The 91 92 is certified to ETSO 2C169a 2C128a TSO C169a and TSO C128a The TY91 and TY92 VHF radios are controlled using a separate front panel controller called the TC90 This allows the radio to be mounted separately from the instrument panel and reduces the amount of panel space taken by the VHF radio The TC90 is certified to ETSO 2C169a and TSO C169a The TY91 runs from either a 14 volt nominal or 28 volt nominal DC power supply with no configuration changes required The TY92 requires a 28 volt nominal supply 2 2 Interfaces 2 2 1 TY91 TY92 radio Unit The main VHF radio unit has a single TNC antenna connection and a single 25 way D type connector The 25 way D type interface provides the following services Power Input The TY91 operates on 11 to 33 volts DC The TY92 operates on 22 to 33 volts DC Front Panel Datalink A two wire data link is used to connect the TY91 TY92 and the controller Front Panel Power The controller is powered from the VHF radio Trig Avionics Limited 7 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Remote On Off Microphone inputs Push to talk inputs Headphone output Speaker output Intercom keyswitch Auxilliary audio input Issue AA The on off switch is on the TC90 controller and uses this input to turn the radio on or off There are two microphone inputs suitable for convention
15. 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 reference for the basic style of hand tool is M22520 2 01 This style of tool can crimp many different contact types and relies on interchangeable positioners to hold the actual contact in use The MIL reference for the positioner that you need for the crimps we supply is M22520 2 08 Any tool that complies with these references can be used to crimp these contacts One of the most popular vendors of these small hand tools is Daniels Manufacturing Corporation see www dmctools com Their AFM8 hand tool complies with M22520 2 01 and their K13 1 positioner is M22520 2 08 compliant so the combination will crimp the supplied connectors Once crimped the contacts should be slotted into the rear of the connector Trig Avionics Limited 25 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA shell Push the contact in until the retaining tab clicks into place Tug gently to confirm the contact is locked in place 5 10 Wiring Considerations 5 10 1 TC90 Interconnect The connection from the TY91 TY92 VHF radio to the TC90 uses a minimum of six 6 signal lines the TMAP pair the Power and Ground pair and the Remote On discrete line plus assoc
16. 0 C operating without cooling air Altitude 35 000 feet Decompression 8 000 to 35 000 feet in 15 seconds Overpressure 15 000 feet Temperature Variation Equipment tested to Category A Humidity Equipment tested to Category A Operational Shocks Equipment tested to Category B Crash Safety Equipment tested to Category B type 5 Vibration Trig Avionics Limited Aircraft zone 2 type 3 4 5 to category S level M type 1 Helicopters to category U level G 45 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Explosion Issue AA Equipment identified as Category X no test required Waterproofness Equipment tested to Category W front face only Fluids Susceptibility Equipment identified as Category X no test required Sand and Dust Equipment identified as Category X no test required Fungus Equipment identified as Category X no test required Salt Spray Equipment identified as Category X no test required Magnetic Effect Equipment tested to Category Z Power Input Equipment identified as Category X no test required Voltage Spike Equipment identified as Category X no test required Audio frequency conducted susceptibility Equipment identified as Category X no test required Induced signal susceptibility Equipment tested to Category BC Radi
17. 92 VHF radio Installation 00839 00 Manual TY91 TY92 Pilots Operating Manual 00840 00 Mounting adapter circular hole adapter 00678 00 Connector Co axial TNC 00723 00 Headshell 15 way 00867 00 Headshell 25 way 00726 00 15 way D type contact housing female 00865 00 25 way D type contact housing female 00866 00 Crimp Terminal Female 22 24 AWG 00730 00 Long mounting screws 4 40 thread 4 00736 00 Short mounting screws 4 40 thread 4 00737 00 4 5 Required Items Additional items you will require but which are not in the TY91 TY92 package include e Antenna and fixing hardware The TY91 TY92 is compatible with any standard 50 ohm vertically polarised antenna with a VSWR better than 2 5 1 e Cables You need to supply and fabricate all required cables Guidance on cable types is given in section 5 below e Fixings To secure the VHF radio tray to the airframe you will need at least 3 flat head screws and three self locking nuts If the aircraft does not have existing mounting provisions you may need to fabricate additional brackets to support the VHF radio tray Trig Avionics Limited 15 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 5 Installation 5 1 Unpacking and Inspecting Equipment Carefully unpack the VHF radio and make a visual inspection of the unit for evidence of any damage incurred during shipment If the unit is damaged notify the shipping company to file a claim for the dama
18. A24H cart SL 15 Series PMA 7000 701 71 om Phone Out 9 13 COM 1 COM2 AUDIO HI Phone Gnd 10 14 21 22 COM 1 COM 2 AUDIO LO MIC 1 In 11 15 PA P se PC COM 1 COM 2 MIC AUDIO HI Ground GND LUG GND LUG COM 1 COM2 MIC AUDIO LO PITI R R COM 1 MIC KEY A TX Interlock 2 MIC KEY Speaker GND Speaker OUT MIC 2 In Intercom PTT TY91 TY92 VHF Radio AUX In Com 2 PITI TX Interlock NOTES 1 ALLWIRES SHOULD BE 18 24 AWG THE 500 OHM AUDIO OUTPUTS ARE BALANCED AND THE PHONE GND MUST BE CONNECTED IF THE AUDIO PANEL DOES NOT HAVE AN AUDIO LO IT SHOULD BE CONNECTED TO A GROUND LUG AT THE AUDIO PANEL THESE INPUTS OUTPUTS ARE DESIGNED FOR A STANDALONE SYSTEM AND SHOULD NOT BE CONNECTED WHEN INTEGRATING THE RADIO WITH AN AUDIO PANEL MOST AUDIO PANELS WILL HAVE DEDICATED CONNECTIONS FOR THESE FEATURES WHICH SHOULD BE USED INSTEAD AN SCREENED CABLE TO MIL 22750 OR 27500 AND THE SCREEN SHOULD ONLY BE EARTHED AT THE AUDIO PANEL END FOR A DUAL RADIO INSTALLATION CONNECT THE TRANSMIT INTERLOCK TO THE MIC KEY PTT OF THE OTHER VHF TRANSCEIVER TO MINIMIZE SQUELCH BREAKS Diagram 2 Audio ON THE COM Panel Connections Trig Avionics Limited Page 53 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA Garmin Ground TMAP A GPSMAP 495 496 695 696 796 TMAP Ground Ground Black NMEA DATA OUT RS232 Out Ground RS232 TC90
19. Applicable documents EUROCAE ED 23C EUROCAE ED 14F RTCA DO 160F RTCA DO 186B Software ED 12B RTCA DO 178B Level B Altitude 35 000 feet Humidity 95 50 C for 6 hours 85 9 38 C for 16 hours Tested to Category A in DO 160F Operating Temperature 20 C to 55 C Physical Specifications behind the panel Height 44mm 1 8 Width 63mm 2 47 Length 54mm 2 1 Weight 0 11165 90 g 3 4 Low Voltage Operation Normal operating voltage for the TY91 is any voltage between 11 and 33 volts whilst normal operating voltage for the TY92 is any voltage between 22 and 33 volts At these voltages all functions behave normally and transmitter power meets the applicable Class requirements of ED 23C The radio will continue to operate at a lower voltage than these ranges As the available voltage falls the transmitter output power will be reduced and at 9 volts the nominal transmitter power will be approximately 2 5 watts The transmitter will be inhibited below 8 volts The receiver also works below the nominal voltage All receiver functions will work normally but as a safety feature to preserve battery power in an emergency at 10 volts or below the available speaker volume will reduce significantly In addition a warning message Low Volts will be displayed on the 12 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA controller when the bus voltage falls below
20. EMS erre nne ennt ener nente enne tnnt 14 4 3 TC90 CONTROLLER ITEMS 14 4 4 INSTALLATION KIT RR 14 4 5 REQUIRED ITEMS ica aan 15 Trig Avionics Limited i TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 5 INSTALLATION 8issscesecssscosesvesessesvescosesvesessenvesensesvesessedoescosesvesesnesenseaes 16 5 1 UNPACKING AND INSPECTING EQUIPMENT 16 5 2 CONTROLLER MOUNTING 16 3 9 RADIO MAIN UNIT MOUNTING eere nennen 17 5 4 COOLING REQUIREMENTS sssssscsececsessssscecececeesesssaeseeececsenssaeeeeess 17 5 5 TY91 TY92 VHF RADIO ELECTRICAL CONNECTIONS 18 5 5 1 TY91 TY92 Interface Pinout ii 18 5 6 TY91 TY92 VHF RADIO INTERFACE DETAILS eene 19 5 6 1 Speaker Output e die e o ee 19 5 6 2 TMAP BUS ei 19 5 6 3 Headphone Output iii 20 5 6 4 Controller Power tae 20 5 6 5 O ela ale 20 5 6 6 PITTI Rey Input aum eH RS 20 5 6 7 Intercom Key Input iii 21 5 6 8 Transmit Interlock eese esee eene 21 5 6 9 Auxiliary Audio INput iii 21 5 6 10 Microphone Input iii 22 5 6 11 Power Input esee tete 22 5 6 12 Ground Returns iii 22 5 7 TC90 CONTROLLER ELECTRICAL
21. Issue AA 8 Normal Operation 8 1 Overview On the front panel is a monochrome LCD display flanked by a rotary volume knob OFF and Squelch function and a dual concentric tuning knob used for frequency entry Secondary Frequency Primary Frequency Memory Monitor Select Select Frequency Step Size On Off Volume and Squelch Knob Frequency Select Knob Primary Standby Flip Flop 8 2 Display The display shows the active and standby frequencies for the radio and has icons to indicate the operating modes 8 3 On Off Volume Knob The left hand knob controls the power to the VHF radio and the audio volume Pressing the left hand knob toggles the radio squelch on and off which can be used to listen for faint stations and as a simple audio test Trig Avionics Limited 35 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 8 4 Tuning Knobs The right hand knobs are used to tune the radio The large knob adjusts the MHz portion of the standby frequency and the smaller knob adjusts the kHz portion of the standby frequency Pressing the end of the small knob changes the channel spacing that the small knob operates through If the radio is configured for 8 33 kHz operation the steps toggle between 8 33 kHz channels and 25 kHz channels If the radio is configured only for 25 kHz operation the steps toggle between 25 kHz and 50 kHz channels Changing the step size does not change the behaviour of the
22. RE AIRCRAFT POWER 11 33VDC AIRCRAFT GROUND 11 April 2012 Issue AA Ground TMAP A Ground RS232 Out RS232 In Ground TC90 Remote ON Power In Ground Reserved Step Key Transfer Key Reserved Reserved Controller NOTES ALL WIRES SHOULD BE 18 24 AWG DC POWER WIRES SHOULD BE A MINIMUM OF 20 AWG GROUND WIRES CAN BE LOOPED TOGETHER OUTSIDE THE CONNECTOR MORE THAN 1 GROUND SHOULD BE PHYSICALLY CONNECTED TO THE TY91 TY92 TO PERMANENTLY ENABLE THE INTERCOM THIS SHOULD CONNECTED DIRECTLY TO GROUND TMAP LINES 2A AND 2B CONTAIN IDENTICAL DATA AS TMAP 1A AND 1B WIRED TOGETHER INTERNALLY bb AUXILIARY AUDIO INPUT ROUTED TO THE SPEAKER AND HEADPHONE OUTPUTS OPTIONAL RS232 INPUT FROM GPS TO PRELOAD STANDBY ACTIVE FREQUENCIES MIC CABLES TO BE WIRED USING A TWISTED SCREENED PAIR WITH THE SCREENING CONNECTED TO GROUND AT THE RADIO END TX INTERLOCK TO BE CONNECTED WHEN INSTALLING A DUAL VHF RADIO SYSTEM REFER TO DIAGRAM 2 IF BOTH PTT1 AND PTT2 ARE PRESSED SIMULTANEOUSLY THEN PTT 1 WILL TAKE PRIORITY AND THEREFORE MIC 1 AUDIO WILL BE ROUTED TO THE RADIO Diagram 1 TY91 TY92 Typical Interconnect Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA Audio Panel PS Engineering Bendix King TY91 TY92 VHF Radio SL 10 Series GMA340 GMA347 PAC24 8000 6000 60008 24 KMA26 28 KM
23. TRIG TY91 TY92 VHF radio Installation Manual 00839 00 AA 11 April 2012 Trig Avionics Limited Heriot Watt Research Park Riccarton Edinburgh EH14 4AP Scotland UK Copyright Trig Avionics Limited 2012 This page intentionally left blank TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA CONTENTS As PREFACE 5 5 1 1 PURPOSE eR REI P Ete es 5 1 2 SCOPE E ULSS NEN ARNES 5 1 3 CHANGES FROM PREVIOUS 18817 44000 3 1 4 DOCUMENT CROSS REFERENCES cesses nennen nennen enne 5 2 0 00 8 7 24 TY91 TY92 1 2 2 0000 0000 enne nnne enne 7 2 2 INTERFACES pcr rne ha AI RETI 7 2 2 1 91 92 VHF radio Unit ii 7 2 2 2 TC90 Controller 222220 0 0000000 0 8 3 TECHNICAL 8 44000 9 31 TY91 VHF RADIO UNIT 00882 00 01 i 9 3 2 TY92 VHF RADIO UNIT 00879 00 01 10 3 3 TC90 CONTROL UNIT 00857 00 01 in 11 3 4 Low VOLTAGE OPERATION eren enne nnne enne nennen 12 3 5 INSTALLATION APPROVAL iii 13 4 UNIT AND ACCESSORIES SUPPLIED cernere ee enne tntnnn 14 4 1 9 VHERADIO TEMS ee rrt Let rere tette 14 4 2 TY92 RADIO IT
24. Y91 power supply can be 11 33 volts DC no voltage adjustment is required The TY92 power supply must be 22 33 volts DC Use a5 Amp circuit breaker for power supply protection to the TY91 and TY92 The peak current consumption on transmit exceeds the current capability of a single pin on the connector Both power inputs must be wired and at least two ground returns must be wired This is particularly important when the VHF radio is mounted on a non conducting surface such as a composite structure Use 20 AWG wire for the power connection wires 5 6 12 Ground Returns There are only 5 ground pins on the 25 way connector at pins 1 9 10 19 and 22 A full wiring loom with speaker two headsets two microphones the TC90 connection power and ground requires 9 ground connections It is therefore necessary to double up connections to ground pins This is usually achieved by bringing a short ground wire from a pin that then acts as a bus point inside the D shell 5 7 TC90 Controller Electrical Connections The TC90 controller has a single 15 way D type male connector to link to the VHF radio and optionally to connect to a GPS for loading frequencies of 22 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA nearby airfields 5 7 1 TC90 Interface Pinout Pin Signal Direction Ground eee Ground HE s Input 7 Ground 8 RemoteON _ Output 9 Powers Input 10 PowerGround
25. al aircraft microphones There are two push to talk inputs corresponding to the two microphones A headphone output suitable for conventional aircraft headsets with impedance in the region of 150 ohms A speaker output suitable for a cabin speaker with impedance of 4 ohms or greater An optional input to allow the intercom to be switch controlled A single connection to allow audio annunciators or ident tones to be routed to the headphones and speaker 2 2 2 TC90 Controller Unit The TC90 controller has a single 15 way D type connector It provides the following services Power Input Front Panel Datalink Remote On Off External switch inputs Serial input The controller receives power from the VHF radio A two wire data link is used to connect the TY91 TY92 and the controller The on off switching is on the controller and controls this output Optional keyswitch inputs to enable remote transfer and frequency stepping Optional input to allow preloading of frequencies generally from a GPS Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 00839 00 11 April 2012 Issue AA 3 Technical Specifications 3 1 TY91 VHF Radio Unit 00882 00 01 Specification Compliance FCC Identification Applicable documents Software Hardware Power Requirements Altitude Humidity Operating Temperature Transmitter Frequency Transmitter Power Transmitter Modulation Stuck mic tim
26. blem No replies will be made to interrogations when a fault has been detected Trig Avionics Limited 37 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA Some FAULT indications can be recovered by switching the VHF radio off and back on again although in all cases a FAULT code implies that there is a fault with the VHF radio or the installation Note the FAULT message shown on the screen and pass that information to your avionics maintenance organisation 38 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 9 Continued Airworthiness Other than for periodic functional checks required by the regulations the TY91 TY92 VHF radio has been designed and manufactured to allow 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 in accordance with Trig Avionics Limited service procedures Trig Avionics Limited 39 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 10 Limited Warranty Trig Avionics Limited warrants our products to be free from defects in materials and workmanship for a period of two 2 years from the
27. bus 5 8 5 Step Button The step button is used to allow remote operation of the radio and is typically used in a helicopter Each time the step input is grounded the next memorised frequency is copied to the standby position The input is active low and will 24 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA be asserted when the voltage to ground is pulled below approximately 4 volts 5 8 6 Transfer Button The transfer button is used to allow remote activation of the frequency change and is typically used in a helicopter The input is active low and will be asserted when the voltage to ground is pulled below approximately 4 volts 5 9 D Connector Crimp Terminals The 25 way and 15 way connectors supplied with the TY91 TY92 installation kit are MIL standard versions of the popular sub miniature D type connector family and use individual crimp terminals and a receptacle The MIL specification for this family of connectors is MIL C 24308 We supply crimp terminals because these are more reliable than soldered connections and are easier to assemble in situ in an aircraft where soldering is impractical They also allow individual wires to be removed and replaced in a receptacle without replacing the whole connector The socket contacts used in the connectors conform to MIL part number M39029 63 368 and are also suitable for wire gauges from 20 to 24 AWG These contacts are widely
28. e the intercom key input to ground and configure the squelch accordingly 5 6 8 Transmit Interlock When two VHF radios are mounted in an aircraft the transmit interlock input of one can be connected to the transmit PTT key of the other radio When the other radio transmitter is keyed the squelch threshold of this radio is increased to minimise break through between one radio and the other Note To improve the performance when using two radios the antennas should be as far apart as practical for example on the top and bottom of the fuselage 5 6 9 Auxiliary Audio Input This input is continually routed to the headphone and cabin speaker outputs It is intended for annunciators and identification tones Note The audio bandwidth on the auxiliary input is limited and is Trig Avionics Limited 21 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA not ideal for MP3 players or other entertainment inputs If such a device is connected the mute settings should be enabled in configuration mode so that radio reception and transmission takes priority over the music input 5 6 10 Microphone Input Microphone connections should be made using shielded twisted pair cables The two microphone inputs are identical and have a nominal sensitivity of 100 mV into a 600 ohm load A bias voltage is supplied by the radio to the microphone inputs to support a preamplifier in the microphone 5 6 11 Power Input The T
29. ened twisted pair should be used to avoid any unwanted signals interfering with the radio installation Unscreened wires can act as small antennas and transmissions from other avionics on the aircraft could be picked up by the radio and heard as interference in the connected headsets For example Mode S transponder transmissions can be audible as clicking sounds in the headset and cause an annoying distraction to the pilot Correctly terminated screened wiring will limit any unwanted transmissions being picked up by the radio and should be used on the MIC and PHONE lines Trig Avionics Limited 27 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 5 11 Antenna Installation The antenna should be installed according to the manufacturer s instructions The following considerations should be taken into account when siting the Antenna antenna should be well removed from any projections the engine s and propeller s It should also be well removed from landing gear doors access doors or others openings which will break the ground plane for the antenna e Avoid mounting the antenna within 2 feet of a GPS antenna and as far as practical from any ELT antenna e Ifthe simultaneous use of two radio units is required then each antenna should be as far apart as practicable for maximum isolation We would recommend placing one antenna on top and one on the bottom of the airframe The Transmit Interlock funct
30. eout Trig Avionics Limited Characteristics ETSO 2C169a Class C E H1 H2 4 6 ETSO 2C128 TSO C169a Class C E 4 6 TSO C128a VZI00882 EUROCAE ED 23C EUROCAE ED 67 EUROCAE ED 14F RTCA DO 160F RTCA DO 186B RTCA DO 207 ED 12B RTCA DO 178B Level B DO 254 Level C 11 33 volts DC Typical 2 8 watts 14volts receive typical 28 watts 14 volts transmit Maximum current 3 2A 55 000 feet 95 50 C for 6 hours 85 38 C for 16 hours Tested to Category A in DO 160F 20 C to 70 C 118 000 MHz to 136 992 MHz 760 channels at 25 kHz spacing 2280 channels at 8 33 kHz spacing 6 watts nominal carrier power 5 6 35 seconds TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA Transmitter Duty Cycle 100 transmit is possible subject to stuck mic timeout Receiver Frequency 118 000 MHz to 136 992 MHz 760 channels at 25 kHz spacing 2280 channels at 8 33 kHz spacing Receiver Sensitivity lt SuV for 6 dB SINAD AGC Characteristic lt 6dB variation 5 uV to 100 mV EMF Physical Specifications in the mounting tray Height 48mm 1 9 Width 66mm 2 5 Length 160mm 6 3 Weight 0 77165 350 g 3 2 92 VHF Radio Unit 00879 00 01 Specification Characteristics Compliance ETSO 2C169a Class C E H1 H2 3 5 ETSO 2C128 TSO C169a Class C E 3 5 TSO C128a FCC Identification VZI00879 Applicable documents EUROCAE ED 23C EUROCAE ED
31. ge To justify your claim save the original shipping container and all packaging materials 5 2 Controller Mounting The TC90 VHF radio controller must be mounted rigidly in the aircraft panel The controller can be mounted in the ultra compact mounting hole or in a conventional 57mm 2 inch instrument cut out The following installation procedure should be followed remembering to allow adequate space for installation of cables and connectors e Select a position in the panel that is not too close to any high external heat source The TC90 is not a significant heat source itself and does not need to be kept away from other devices for this reason Don t forget that on some aircraft the canopy can focus the sun onto the panel and make the controller very hot e Avoid sharp bends and placing the cables too near to the aircraft control cables If you are using a 57mm instrument cut out you must first clip the two mounting adapters to the controller The controller should then be mounted using the four LONG screws provided Note The mounting adapters are held in place by the clamping action of the panel installation As an aid to securing them during assembly when access is poor we recommend putting a rubber band around the adapters and the control head The rubber band can be snipped off and discarded when the installation is complete If you are using the Trig compact cut out you do not need the mounting 16 Trig Avionics L
32. iated ground line In a certified installation the normal wire choice would be Tefzel hook up wire Wire of 20 AWG is more than adequate for the task in installations where weight is an issue wire of 22 or 24 AWG can also be used Where lighter wires than 20 AWG are used the individual wires should be laced together for support The TY91 TY92 TC90 interface was tested and certified using unshielded untwisted wiring and that is sufficient for a certified installation There may however be technical benefits of improved electromagnetic emissions and susceptibility to and from the VHF radio system if the two wires of the TMAP pair are lightly twisted together one twist per 1 to 2 inches is appropriate This may reduce interference and break through on adjacent audio wiring if it is not possible to route them separately For tidiness and consistency the other pairs in the bundle can also be twisted but there will be no particular difference in behaviour The distance between the TY91 TY92 VHF radio and the TC90 controller is limited by the impedance of the wire between them The TC90 is powered from the TY91 TY92 not from aircraft power and therefore the acceptable voltage drop in the power line is what limits the distance The TC90 needs an impedance of less than 1 ohm in the power line for satisfactory operation The following table gives guidelines for typical aircraft hook up wire Note that different brands may vary check your supplie
33. imited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA adapters The controller should be mounted using the four SHORT screws provided The screws supplied are appropriate for panel thicknesses from 3 mm to 5 mm Ifa thinner panel is used you may need to exchange the screws for shorter versions since they can bottom out in the mounting holes If alternate screws are required please note that the mounting thread in each case is 4 40 5 3 VHF Radio Main Unit Mounting The TY91 TY92 VHF radio 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 e Select a position in the aircraft that is not too close to any high external heat source The TY91 TY92 can become warm to the touch itself e Avoid sharp bends and placing the cables too near to the aircraft control cables e Secure the mounting tray p n 00667 00 to the aircraft via the three 3 mounting holes in the tray The tray should be mounted to a flat surface it is important that the tray is supported at the two dimples as well as the three mounting points e Put the TY91 TY92 VHF radio into the secured mounting tray by hooking the connector end under the lip on the tray e Lock the TY91 TY92 VHF radio into the mounting tray by clipping the retaining wire over the lug
34. ion should also be used in this case section 5 6 8 e Where practical plan the antenna location to keep the cable lengths as short as possible and avoid sharp bends in the cable to minimise the VSWR Electrical connection to the antenna should be protected to avoid loss of efficiency as a result of the presence of liquids or moisture All antenna feeders shall be installed in such a way that a minimum of RF energy is radiated inside the aircraft 5 11 1 Antenna Ground Plane When a conventional aircraft monopole antenna is used it relies on a ground plane for correct behaviour For ideal performance the ground plane should be as large as practical in any case at least 1 metre square In a metal skinned aircraft this is usually easy to accomplish but is more difficult in a composite or fabric skinned aircraft In these cases a metallic ground plane should be fabricated and fitted under the antenna The thickness of the material used to construct the ground plane is not critical 28 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA providing it is sufficiently conductive 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 Use a high quality 50 ohm coaxial cable such as RG400 or RG142B When routing the cable ensure that you e Route the cable
35. ired the 8 33 kHz channels can be disabled to simplify the tuning operation 32 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA Note 8 33 kHz operation is required in some European airspace Trig Avionics Limited 33 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 7 Post Installation Checks Post installation checks should be carried out in accordance with your certification requirements These checks should include Receiver operation Tune a local station and check that the reception is clear and understandable Transmitter operation Contact a local station and check that they are receiving you successfully Interference check Check the radio with other avionics and electrical equipment on the aircraft operating Check at low mid and high radio frequencies There should be no significant interference on reception and when the TY91 TY92 transmits there should be no adverse effect on any other equipment Sidetone adjustment During the transmit checks verify the sidetone level is set appropriately Intercom adjustment If the intercom function is being used set the listening level and squelch appropriately Note that the squelch is best adjusted in the normal ambient noise environment for example with the engine s running and developing power 34 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00
36. is tes eas 35 8 3 ON OFF VOLUME 35 8 4 TUNING 615 He DP ER EK T 36 8 5 ELHIP FELOP BUTTON ecce e ned eee 36 8 6 MON BUTION corra leali ene RE nana 36 8 7 MEM BUTTON 55 hill 36 8 8 GENERAL LOW TEMPERATURE OPERATION nr 37 8 9 WARNING 55 6 37 8 10 FAULT ANNUNCIATION eee hne nnn nnn rr rr rr nn 37 9 CONTINUED AIRWORTHINESS eee eee eere 39 10 LIMITED 1 24 1 1 28 68000 0 0 004 40 11 ENVIRONMENTAL QUALIFICATION FORMS 41 12 INSTALLATION DRA WINGS eere eese eee eese en soot toe e etta ue 47 12 1 MOUNTING TRAY FIXING AND OVERALL DIMENSIONS rr 47 12 2 FRONT PANEL CONTROLLER DIMENSIONS 0 0 0 48 12 3 FRONT PANEL CUT OUT OPTIONS eee 49 13 WIRING DIAGRAMS ccssssccssssscccssseccesssccccsssccccsseccesssscccssnes 51 iv Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 1 Preface 1 1 Purpose This manual describes the physical and electrical characteristics and the installation requirements for a TY91 TY92 VHF radio and associated controller 1 2 Scope This document applies to the installation of the TY91 and TY92 VHF radio
37. o frequency susceptibility Equipment tested to Category TT Radio frequency emission Equipment tested to Category M Lightning induced transient susceptibility Equipment tested to Category B2H22 Lightning direct effects Equipment identified as Category X no test required Icing Equipment identified as Category X no test required Electrostatic Discharge Equipment tested to Category Fire Flammability 46 Equipment identified as Category C Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 12 Installation Drawings 12 1 Mounting tray fixing and overall dimensions p eas 77 All dimensions in millimetres Trig Avionics Limited 47 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 12 2 Front Panel Controller Dimensions Controller shown without the mounting adapters 00678 00 used for 57mm 24 inch instrument mounting All dimensions in millimetres 48 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 12 3 Front Panel Cut out Options The front panel controller can be fitted to either the compact mounting hole or a conventional 57mm 2 inch instrument cut out The compact mounting is a truncated 58 mm opening please note that the mounting screws are NOT in the same location for the two options Note The
38. ould click into place in the body the inner shield should be inside the body of the connector and the outer shield should be outside the body e Crimp the outer sleeve over the shield e Slide heat shrink tubing forward flush to connector and heat to shrink the tubing 30 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 6 Installation Setup and Test 6 1 Initial Power On The TC90 will display a splash screen when the radio is first switched on The splash screen shows the software versions currently loaded and what model of radio is connected 6 2 Configuration Items There are a small number of installation parameters that can be adjusted These parameters are accessed by turning on the radio and then pressing and holding the MON button for approximately 2 seconds The individual setup items can then be selected using the large tuning knob and adjusted using the small tuning knob Pressing MON again will exit from the setup mode The script will prompt for the following configuration items e Intercom Volume e Intercom Squelch e Auxiliary Input Volume Auxiliary Input Muting e Sidetone Volume e Receiver Squelch Offset e Frequency Step Size 6 2 1 Intercom Volume This setting controls the volume of the intercom 6 2 2 Intercom Squelch The intercom includes a voice activated squelch control to limit the Trig Avionics Limited 31 TY91 TY92 VHF Radio Installa
39. r for details Gauge Ohm km Length for 1 Ohm 20 AWG 28 4 m 26 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA An alternative to a harness built from individual wires particularly for a long cable run is to use a multi core cable Aviation grade cable with 6 or more cores is often more expensive than the individual wires and therefore is not generally a good choice for a certified aircraft For aircraft where those considerations do not apply however an attractive alternative solution may be to use 3 pair or 4 pair data cable Whilst appropriate cables may exist please note that not all data cable is suitable for this application Cables with solid cores should not be used and cables should be selected based on the wear characteristics of their insulation material including temperature rating resistance to solvents and oils and flammability Most inexpensive commercial data cables have poor flammability properties Note If you are installing more than one Trig TY91 TY92 radio or installing a radio with a Trig TT21 TT22 transponder then bundling the TC90 and TC20 control head interconnecting wires into one loom is acceptable and will not cause any interference between the two units The same is not true of the audio wiring or antenna wiring these should be kept apart using normal wiring practices 5 10 2 Audio wiring For any wires carrying an audio signal a scre
40. radio only the tuning knob step size it helps to quickly tune a frequency 8 5 Flip flop Button The Flip flop button swaps the frequency in the standby display at the bottom of the screen into the active position and moves the active frequency to the standby position 8 6 MON Button The TY91 TY92 includes a dual frequency listen feature pressing the MON button toggles this feature on and off When the feature is active a 2 icon appears next to the standby frequency and the radio will scan between the active and standby frequencies listening for transmissions This is useful in an aircraft with only a single radio since it allows you for example to copy the ATIS whilst maintaining a listening watch on the ATC frequency 8 7 MEM Button Behaviour of the MEM button depends on whether you have a GPS connected that can load frequencies into the TC90 If you do then pressing the MEM button allows access to those frequencies Turning the LARGE knob steps through the airports for which frequencies have been loaded Turning the 36 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA SMALL knob then steps through the individual frequencies for that airport After you have stepped through all the loaded airports or if there is no GPS attached the built in memory of the TC90 is displayed The TC90 has nine frequency memories Each frequency position can be selected by turning
41. s on the opposite end 5 4 Cooling Requirements The TY91 TY92 VHF radio meets all applicable ETSO requirements without forced air cooling Reasonable air circulation should be provided Attention should be given to the incorporation of cooling provisions to limit Trig Avionics Limited 17 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA the maximum operating temperature if the TY91 TY92 is installed in close proximity to other avionics The reliability of equipment operating in close proximity in an avionics bay can be degraded if adequate cooling is not provided 5 5 TY91 TY92 VHF Radio Electrical Connections The TY91 TY92 has a single 25 way male socket which provides the audio data and power inputs to the VHF radio A single TNC coaxial connector attaches to the antenna 5 5 1 TY91 TY92 Interface Pinout Pin Signal Direction p SpaerRm 4 TMAPIB Bidirecional RS232 In Input RS232 Out Output L7 Bidirectional rare Bidirectional 10 HeadphoneRewm PTT2 Key Input Key Input 18 Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Issue AA 16 Reserved Transmit Interlock Ground 22 Ground 24 Aircraft Power DE 25 The following diagram shows the connector orientation as viewed from the wiring side 25 14
42. the SMALL tuning knob Whether from a GPS or from the onboard memory bank the selected frequency is loaded into the standby window Pressing MEM again leaves the stored frequency in the standby window Pressing the Flip flop button loads the stored frequency directly into the active channel To store a frequency in one of the memory locations it must first be tuned and active Press MEM to enter the memory mode in the usual way Select the channel you want to overwrite with the tuning knobs Now press AND HOLD the MEM button for 2 seconds The current active frequency will be moved to the selected memory location overwriting the existing contents 8 8 General Low Temperature Operation The TY91 TY92 is certified to operate correctly down to 20 C but at low temperatures the controller display may be impaired On a cold day you may need to wait for the cockpit to warm up to ensure normal operation 8 9 Warning Messages If the VHF radio detects a problem the screen will indicate WARNING and a brief statement of the problem Depending on the nature of the problem your VHF radio may not be working properly Note the message on the screen and pass that information to your avionics maintenance organisation Press ENT to clear the message if the fault is still present the message will reappear 8 10 Fault Annunciation If the VHF radio detects a catastrophic internal failure the screen will indicate FAULT and a brief statement of the pro
43. tion Manual 11 April 2012 00839 00 Issue AA background noise heard over the intercom Increasing the squelch level requires a louder microphone input to gate the intercom 6 2 3 Auxiliary Input Volume The auxiliary input is a low fidelity monophonic input intended for nav radio ident inputs and simple annunciators This setting controls the relative volume of the auxiliary audio input 6 2 4 Auxiliary Input Muting This allows the auxiliary input to be muted when the radio is receiving or transmitting speech Turn this feature ON if the auxiliary input is being used for non essential services like an MP3 player Turn this feature OFF if the auxiliary input is being used for essential services like annunciators or traffic alerts 6 2 5 Sidetone Volume The audio sidetone is the transmitted audio signal this setting controls the level of the sidetone in the headphones 6 2 6 Receiver Squelch Offset The receiver has a factory set nominal squelch point of approximately 95 dBm which should be appropriate for most installations In some aircraft with noisy electrical environments such as vintage or experimental aircraft the factory setting may lead to nuisance squelch changes triggered by noise The receiver squelch offset allows the installer to moderately increase the squelch set point 6 2 7 Frequency Step Size The TY91 TY92 is capable of operating in both an 8 33 kHz and 25 kHz environment If 8 33 kHz operation is not requ
44. ts Section Equipment tested to Categories A2 C1 Low temperature ground survival 55 C Low temperature short time operating 40 C Low temperature operating 20 C High temperature operating 70 C High temperature short time operating 70 C High temperature ground survival 85 C Loss of Cooling Cooling air not required 70 C operating without cooling air Altitude 55 000 feet Decompression 8 000 to 35 000 feet in 15 seconds Overpressure 15 000 feet Temperature Variation Equipment tested to Category B Humidity Equipment tested to Category A Operational Shocks Equipment tested to Category B Crash Safety Trig Avionics Limited Equipment tested to Category B type 5 41 TY91 TY92 VHF Radio Installation Manual 11 April 2012 00839 00 Vibration Issue AA Aircraft zone 2 type 3 4 5 to category S level M type 1 Helicopters to category U level G Explosion Equipment identified as Category X no test required Waterproofness Equipment identified as Category X no test required Fluids Susceptibility Equipment identified as Category X no test required Sand and Dust Equipment identified as Category X no test required Fungus Equipment identified as Category X no test required Salt Spray Equipment identified as Category X no test req
45. uired Magnetic Effect Equipment tested to Category Z safe distance 1 metre Power Input Equipment tested to Category BX Voltage Spike Equipment tested to Category B Audio frequency conducted susceptibility Equipment tested to Category B Induced signal susceptibility Equipment tested to Category AC Radio frequency susceptibility Equipment tested to Category TT Radio frequency emission Equipment tested to Category B Lightning induced transient susceptibility Equipment tested to Category B2H22 Lightning direct effects Equipment identified as Category X no test required Icing Equipment identified as Category X no test required Electrostatic Discharge Equipment identified as Category X no test required Fire Flammability 42 Equipment identified as Category C Trig Avionics Limited TY91 TY92 VHF Radio Installation Manual 00839 00 Nomenclature 11 April 2012 Issue AA TY92 VHF radio Part No 00879 00 01 ETSO 2C169a Manufacturer Trig Avionics Limited Address Conditions Temperature and Altitude Heriot Watt Research Park Riccarton Edinburgh Scotland EH14 4AP DO 160F Section Description of Conducted Tests Equipment tested to Categories A2 C1 Low temperature ground survival 55 C Low temperature short time operating 40 C Low temperature operating
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