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TX56/56A and TX57/57A Installation Manual

5 April 2022

01776-00-01

Issue AD

______________________

Trig Avionics

Page 5

Auxiliary
audio input

A single connection to allow audio annunciators or ident
tones to be routed to the headphones and speaker.
Auxiliary audio input is not routed to mono audio output.

Music audio
input

A two channel music input to allow connection of a stereo
audio signal of 1.5Vrms into a 600 ohms load. Audio is
routed to the headphones only.

OUTPUTS

Speaker
output

A speaker output suitable for a cabin speaker with
impedance of 4 ohms or greater.

Audio routing: Received audio and auxiliary input.

Headphone
outputs

Two stereo headphone outputs suitable for conventional
aircraft headsets with impedance in the region of 150 –
600 ohms.

Audio routing: Intercom, received audio, auxiliary and
music inputs, transmitter sidetone

Mono audio
output

A mono audio output designed to connect to an aircraft
audio panel with an impedance of 600 ohms.

Audio routing: Received audio, transmitter sidetone

The 44 way D-type interface provides the following services:

INPUTS

DESCRIPTION

Power input

The Nav receiver has a separate power input from the
Com radio. It operates on 11 to 33 volts DC.

OBS Resolver
Inputs

Conventional four wire D/E/F/G input from an external
OBS.

OUTPUTS

Nav composite
output

A VOR/LOC composite audio signal for instruments with
built-in converters.

Nav audio
output

Audio output for Nav voice and ident connection to audio
panel.

Summary of Contents for TX56

Page 1: ...TX56 56A and TX57 57A Installation Manual 01776 00 01 AD 5 April 2022 Trig Avionics Europe B V Hardwareweg 3 3821 BL Amersfoort Netherlands Copyright Trig Avionics 2019 ...

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

Page 3: ...FICATIONS 7 3 1 COMMON FEATURES 7 3 2 VOR SPECIFICATIONS 7 3 3 LOC SPECIFICATIONS 8 3 4 GLIDESLOPE SPECIFICATION 8 3 5 SPECIFIC TO TX56 TRIG PART NUMBER 01576 00 01 9 3 6 SPECIFIC TO TX57 TRIG PART NUMBER 01578 00 01 9 3 7 SPECIFIC TO TX56A TRIG PART NUMBER 01954 00 01 10 3 8 SPECIFIC TO TX57A TRIG PART NUMBER 01956 00 01 11 3 9 PHYSICAL SPECIFICATIONS IN TRAY 12 3 10 LOW VOLTAGE OPERATION 12 3 11...

Page 4: ...D ITEMS 17 5 INSTALLATION 18 5 1 UNPACKING AND INSPECTING EQUIPMENT 18 5 2 INSTALLATION OVERVIEW 18 5 3 COOLING REQUIREMENTS 19 5 4 ELECTRICAL CONNECTIONS 20 5 4 1 Com Connector D type 20 5 4 2 Nav Connector D type 21 5 4 3 Orientation Diagram 24 5 4 4 D Connector Crimp Terminals 24 5 4 5 Power and Ground Wiring 25 5 4 6 Stereo Wiring Considerations 26 5 4 7 Mono Wiring Considerations 27 5 4 8 Aud...

Page 5: ...io Output 34 5 6 4 Transmit Interlock 34 5 6 5 Lighting Bus Input 34 5 6 6 PTT1 2 Key Input 35 5 6 7 Intercom Key Input 35 5 6 8 Auxiliary Audio Input 35 5 6 9 Music Audio Input 36 5 6 10 Microphone Input 36 5 6 11 RS232 Input Output 36 5 6 12 Remote Flip flop 36 5 6 13 Nav Audio Output 36 5 6 14 Nav Right Left Output 36 5 6 15 Glideslope Up Down Output 37 5 6 16 To From Flag Output 37 5 6 17 Nav ...

Page 6: ...INSTALLATION SETUP AND TEST 41 6 1 INITIAL POWER ON 41 6 2 CONFIGURATION ITEMS 41 6 2 1 Intercom Volume 42 6 2 2 Intercom Squelch 42 6 2 3 Music Volume 42 6 2 4 Music Muting 42 6 2 5 Frequency Step Size 43 6 2 6 Internal Nav Audio Routing 43 6 2 7 CDI Type 43 6 2 8 OBS Calibration 44 6 2 9 Remote Protocol Choice 44 6 2 10 Auxiliary Input Volume 44 6 2 11 Auxiliary Input Muting 44 6 2 12 Sidetone V...

Page 7: ...2 DISPLAY MODES 49 8 3 COM RADIO DISPLAY 49 8 4 NAV RADIO DISPLAY 50 8 5 OBS DISPLAY 51 8 6 T F TO FROM BUTTON 52 8 7 LOCALIZER BACK COURSE APPROACHES 52 8 8 ON OFF VOLUME SQUELCH IDENT KNOB 52 8 9 COM RADIO TUNING STEP SIZE 53 8 10 MON BUTTON 53 8 11 PLAY BUTTON 56 8 12 INTERCOM FUNCTION 56 8 13 FREQUENCY DATABASE 56 8 14 RECENT FREQUENCIES 57 8 15 GPS DATABASE 58 8 16 ENTERING NEW FREQUENCIES 58...

Page 8: ...NG MESSAGES 61 8 21 FAULT ANNUNCIATION 62 9 CONTINUED AIRWORTHINESS 63 9 1 CLEANING THE FRONT PANEL 63 10 LIMITED WARRANTY 64 11 ENVIRONMENTAL QUALIFICATION FORMS 65 12 INSTALLATION DRAWINGS 73 13 WIRING DIAGRAMS 75 14 USB FILE FORMAT 83 14 1 INTRODUCTION 83 14 2 COM FREQUENCIES 83 14 3 NAV FREQUENCIES 85 14 4 USB COMPATIBILITY 85 ...

Page 9: ...ifier is 1 2 The software and FPGA versions are subject to change without notice 1 3 Changes from Previous Issue 3 13 3 Audio Interfaces Minor editorial change 1 4 Document Cross References 01775 00 TX56 56A and TX57 57A Nav Com Operating Manual AB ETSO 2C169a VHF Radio Communication Transceiver Equipment Operating within the Radio Frequency Range 117 975 137 Megahertz EASA ETSO 2C128 Devices That...

Page 10: ...A Installation Manual 5 April 2022 01776 00 01 Issue AD ______________________ Page 2 Trig Avionics 108 112 Megahertz ETSO 2C40c VOR Receiving Equipment Operating Within the Radio Frequency Range 108 117 95 Megahertz EASA ...

Page 11: ...ariants that use 25 kHz channel spacing and are ED 23C compliant class C 25 kHz offset carrier communication radios The TX56A has a nominal power output of 10 watts and meets the power output requirements for Class 4 The TX57A has a nominal power output of 16 watts and meets the power output requirements for Class 3 The TX56A and TX57A are also certified to ETSO 2C169a 2C128 2C34f 2C36f and 2C40c ...

Page 12: ... combiner will be needed to present both inputs on the single connector The 25 way D type interface provides the following services INPUTS DESCRIPTION Power input The TX56 operates on 11 to 33 volts DC The TX57 operates on 22 to 33 volts DC Lighting bus input Connects to the aircraft lighting bus and is used to adjust the switch lighting intensity RS232 input An optional input to allow preloading ...

Page 13: ...ne outputs Two stereo headphone outputs suitable for conventional aircraft headsets with impedance in the region of 150 600 ohms Audio routing Intercom received audio auxiliary and music inputs transmitter sidetone Mono audio output A mono audio output designed to connect to an aircraft audio panel with an impedance of 600 ohms Audio routing Received audio transmitter sidetone The 44 way D type in...

Page 14: ... Conventional two wire C H output to drive the external OBS DME interface King style Data Clock Request Common interface to channel an external DME Superflags Nav and glideslope superflag outputs Back course Annunciator output when Nav receiver is in localiser back course mode ILS energise Output active when an ILS is tuned Switched power Switched power output for nav indicator or other accessorie...

Page 15: ...are ED 12C RTCA DO 178C Level B Hardware ED 80 RTCA DO 254 Level C Altitude 55 000 feet Humidity 95 50C for 6 hours 85 38C for 16 hours Tested to Category A in ED 14G DO 160G Operating Temperature 20C to 55C 3 2 VOR Specifications Specification Characteristics Compliance ETSO 2C40c Receiver Audio Sensitivity Typical 105 dBm for 6 dB SINAD Course Deviation Sensitivity Typical 105 dBm for 2 degree e...

Page 16: ...dBm for 6 dB SINAD Course Deviation Sensitivity Typical 105 dBm for 60 of standard deflection AGC Characteristic Less than 3 dB variation from 99 dBm to 13 dBm Output Deflection 90 mV for standard deflection Audio Output Minimum 40 mW into 600 ohms Audio Response Less than 6 dB variation from 350 Hz to 2500 Hz Ident filter at 1020 Hz Composite Output 0 39 V RMS into 1 kohm 3 4 Glideslope Specifica...

Page 17: ...0 mA at 14 volts Transmitter Frequency 118 000 MHz to 136 992 MHz 760 channels at 25 kHz spacing 2280 channels at 8 33 kHz spacing Transmitter Power 10 watts nominal carrier power Transmitter Modulation 5K6 A3E Stuck mic timeout 35 seconds 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 c...

Page 18: ...wer 16 watts nominal carrier power Transmitter Modulation 5K6 A3E Stuck mic timeout 35 seconds Transmitter Duty Cycle 25 Receiver Frequency 118 000 MHz to 136 992 MHz 760 channels at 25 kHz spacing 2280 channels at 8 33 kHz spacing Receiver Sensitivity 5uV for 6 dB SINAD AGC Characteristic 6dB variation 5 uV to 100 mV EMF 3 7 Specific to TX56A Trig Part Number 01954 00 01 Specification Characteris...

Page 19: ...Hz spacing Receiver Sensitivity 5uV for 6 dB SINAD AGC Characteristic 6dB variation 5 uV to 100 mV EMF 3 8 Specific to TX57A Trig Part Number 01956 00 01 Specification Characteristics Compliance ETSO 2C169a Class C 3 ETSO 2C128 Power Requirements 22 33 volts DC Typical 7 1 watts 28 volts Input Current Com Receive typical 175 mA max 450 mA at 28 volts Transmit typical 3 A max 3 8 A at 28 volts Inpu...

Page 20: ...een 11 and 33 volts whilst normal operating voltage for the TX57 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 t...

Page 21: ...dio routing and control for auxiliary audio input and stereo music input The operation of each of these functions is described later in this manual 3 13 Limitations 3 13 1 Installation If the aircraft is intended to operate under IFR it is recommended that it be equipped with at least two VHF Com radios and two Nav receivers such as two TX56 Nav Coms A single TX56 as the sole VHF Com and Nav solut...

Page 22: ...dio routing requirements where a conventional audio panel is not installed Most of the applicable requirements of DO 214A are supported by the internal intercom but not all In particular the input output system polarity of the music inputs is not maintained These signals are inverted by the Nav Com If used as intended to route music to the headsets this will have no practical effect These inputs h...

Page 23: ...Nav Com Items The TX56A Nav Com includes the following items Item Description Qty Part Number TX56A Nav Com 1 01954 00 01 TX56 TX57 Mounting Tray and Installation kit 1 02126 00 4 3 TX57 Nav Com Items The TX57 Nav Com includes the following items Item Description Qty Part Number TX57 Nav Com 1 01578 00 01 TX56 TX57 Mounting Tray and Installation kit 1 02126 00 4 4 TX57A Nav Com Items The TX57A Nav...

Page 24: ... Way D receptacle to M24308 1 00866 00 Crimp Socket Contact Wire size 20 24 AWG M39029 63 368 25 00730 00 Connector Standard Mount 44 Way D receptacle to M24308 1 02007 00 Crimp Socket Contact Wire size 22 28 AWG M39029 57 354 44 02006 00 D Sub Shell 2 01440 00 D Sub Shell Clamp 2 01441 00 D Sub Shell Cover 2 01442 00 BNC Female to Blind Mate Adaptor 2 01410 00 Washer 7 16 Plain Stainless Steel 2 ...

Page 25: ...antenna and fixing hardware The TX56 or TX57 are compatible with any standard 50 ohm vertically polarised antenna with a VSWR better than 2 5 1 VHF Nav antenna and fixing hardware The TX56 or TX57 are compatible with any standard 50 ohm horizontally polarised broadband antenna Cables You need to supply and fabricate all required cables Guidance on cable types is given in section 5 Fixings To secur...

Page 26: ...d does not need to be kept away from other devices for this reason Prepare the instrument panel to ensure the radio mounting tray can be secured using the mounting holes in the tray The front edge of the mounting tray should sit flush with the instrument panel It is advisable to complete the 25 way and 44 way D sub cable harnesses at this point before securing the mounting tray into the aircraft T...

Page 27: ... unscrewing the locking screw using a 3 32 Allen key Slide the Nav Com into the secured mounting tray Lock the Nav Com into the mounting tray using a 3 32 Allen key gently hand tighten the locking screw 5 3 Cooling Requirements The Nav Com meets all applicable ETSO requirements without forced air cooling Reasonable air circulation should be provided Attention should be given to the incorporation o...

Page 28: ... connect the Com antenna and one is used for the Nav antenna 5 4 1 Com Connector D type The pinout for the 25 way Com D type is as follows Pin Signal Direction 1 Speaker Out Output 2 Headphone 1 Left Out Output 3 Headphone 1 Right Out Output 4 Ground 5 Headphone 2 Left Out Output 6 Headphone 2 Right Out Output 7 Mono Audio Out Output 8 Lighting Bus In Input 9 Ground 10 Transmit Interlock In Input ...

Page 29: ... 21 Pin Signal Direction 17 Ground 18 Microphone 1 Input 19 Microphone 2 Input 20 Reserved Input 21 Remote Flip flop Input 22 Intercom Key Input 23 PTT1 Input 24 PTT2 Input 25 Aircraft Power DC Figure 1 Mounting Tray 25 Way D type Connector 5 4 2 Nav Connector D type The pinout for the 44 way Nav D type is as follows ...

Page 30: ...udio Output 5 Nav Audio Ground 6 Nav Right Output 7 Nav Left Output 8 Glideslope Up Output 9 Glideslope Down Output 10 To From Flag Output 11 To From Flag Output 12 Nav Valid Flag Output 13 Nav Valid Flag Ground 14 VOR LOC Composite Output 15 Composite Ground 16 Switched Power 500 mA Output 17 Power Ground 18 System Ground 19 System Ground 20 System Ground 21 System Ground 22 Power Control 50 mA O...

Page 31: ...id Output 26 GS Valid Ground 27 System Ground 28 System Ground 29 System Ground 30 System Ground 31 ILS Energise Output 32 Back course Annunciator Output 33 Nav Superflag Output 34 Glideslope Superflag Output 35 DME Data Output 36 DME Clock Output 37 RNAV Channel Request Input 38 DME Common Input 39 OBS H Output 40 OBS C Ground 41 OBS F Input 42 OBS G Input 43 OBS D Input 44 OBS E Input ...

Page 32: ...f connections This diagram shows the expected connector positions when viewed from the radio side of the tray looking into the tray from the front 5 4 4 D Connector Crimp Terminals The D type connectors supplied with the TX56 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 ...

Page 33: ...able positioners to hold the actual contact in use The MIL reference for the positioner that you need for the Com connector socket contacts we supply is M22520 2 08 The MIL reference for the positioner that you need for the Nav connector socket contacts we supply is M22520 2 06 Any tool that complies with these references can be used to crimp these contacts One of the most popular vendors of these...

Page 34: ... as a Com radio without needing the Nav receiver to be powered The Nav radio however will not operate without power to both the Nav receiver and the Com radio 5 4 6 Stereo Wiring Considerations The TX56 uses stereo for the headphone connections It is important to connect the left and right audio signals correctly to ensure the intercom and dual watch audio is correctly routed to the headphones A t...

Page 35: ... a previous mono Nav Com where you wish to utilise the existing wiring and mono headset jacks 5 4 8 Audio Wiring All wires carrying audio signals should be wired using 22 AWG shielded cable to MIL C 27500 or equivalent Mono audio signals should use 2 core shielded cable and stereo signals should use 3 core shielded cable One core wire within each shielded cable should be connected to ground the ca...

Page 36: ...sing a solder sleeve attach some flat copper braid to the exposed shield and terminate with a crimp ring Repeat for all shielded cable and connect the crimp ring terminals to the ground points on the mounting tray back plate Connect the cable shields to the mounting tray back plate along with the signal ground connections using the 5mm M2 5 screws and spring washers 15mm 25mm 30mm 60mm Strip the i...

Page 37: ...ouped together and terminated with another ring crimp along with a ground fly lead that will be used to connect to a ground pin on the 25 way connector The ground fly lead wire size should be 20 AWG and terminated with another D connector socket contact Ground lugs x6 Group signal grounds together and connect to mounting tray back plate Fly lead to ground pin on the 25 way connector ...

Page 38: ...The following considerations should be taken into account when siting the Antenna The 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 other openings which will break the ground plane for the antenna Avoid mounting the antenna within 2 feet of a GPS antenna and as far as practical from any ELT an...

Page 39: ...e 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 g...

Page 40: ... or two splitter combiner stages should still permit a compliant system You should still take care to minimise the topology so that the sensitivity of the Nav system is not overly reduced If you need to combine separate VOR LOC and glideslope antenna signals or separate a combined signal into discrete VOR LOC and glideslope for another Nav receiver a diplexer can be used which will combine or spli...

Page 41: ...ng the cable even temporarily during installation Secure the cable so that it cannot interfere with other systems The antenna cable should be terminated with BNC type male connector 5 5 6 BNC Connections Feed the supplied blind mate BNC connectors into the TX56 mounting tray back plate and attach the washer combination in the following order Wave washer part number 00317 00 Plain washer part numbe...

Page 42: ...Note that only the received radio audio and transmitter sidetone will be output music and aux audio will NOT be present 5 6 4 Transmit Interlock When two communication 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...

Page 43: ...for both microphone inputs Single PTT mode can be enabled See section 6 2 18 for more details 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 pi...

Page 44: ...usted within the setup menu 5 6 11 RS232 Input Output The RS232 input allows certain third party multi function displays to preload the standby and active frequencies and to monitor the Nav Com status The radio understands the Apollo SL30 protocol PMRRC and PMRRV and the Garmin GNC protocol PGRMC and PGRMV both of which are based on NMEA at a speed of 9600 bps 5 6 12 Remote Flip flop This input is...

Page 45: ...V for a valid indication 5 6 18 ILS Energise Output ILS Energise is an active low output that can sink up to 400 mA It is low when an Instrument Landing System ILS frequency has been tuned in the primary position on the Nav receiver it is high impedance when a VOR frequency is tuned ILS energise is intended to activate an external glideslope receiver and or switch an indicator relay 5 6 19 Back Co...

Page 46: ...e path to ground when the Nav receiver is on It can sink only 50 mA It is intended to be used in conjunction with external switches or relays to enable an external instrument or indicator 5 6 24 DME Interface The DME interface provides 5 pins that correspond to the King serial Distance Measuring Equipment DME tuning interface DME Common is an input that is used to select between multiple Nav Coms ...

Page 47: ...oth power inputs must be wired and at least two ground returns must be wired Use 20 AWG wire for the power connection wires The Nav receiver power consumption is lower and a single 22 AWG wire on the 44 way connector is sufficient Note The power consumption figures for the Nav Com do not include current taken from the switched power output or from the superflag outputs If these outputs are used th...

Page 48: ...TX56 56A and TX57 57A Installation Manual 5 April 2022 01776 00 01 Issue AD ______________________ Page 40 Trig Avionics Refer to section 5 4 for further wiring considerations ...

Page 49: ... by pressing and holding the MON button for approximately 2 seconds Those that are infrequently accessed only appear when a second step is accomplished by pressing and holding the MEM button for 2 seconds after the in flight settings screen is displayed The individual setup items are selected using the large tuning knob and adjusted using the small tuning knob Pressing MON again will exit from the...

Page 50: ... squelch level requires a louder microphone input to turn on the intercom If you set the intercom squelch to minimum turning the knob anti clockwise then you can speak quietly or at greater distance from the mic If you have trouble with audible background noise opening the squelch when you re not speaking you can increase the squelch to make the radio to ignore background noise 6 2 3 Music Volume ...

Page 51: ...ernal Nav Audio Routing If the Nav Com is used in stand alone mode without an external audio panel the Nav Audio voice and Morse ident can be routed to the headphone and speaker outputs When internal Nav audio is enabled the audio choice cycles through Voice Ident and muted and the selected Nav audio signal will be heard in the headphone outputs When internal Nav audio is disabled the audio choice...

Page 52: ...nterface which can be corrected by the Nav Com Once selected the calibration process involves selecting in turn twelve equally spaced bearings on the external instrument 000 030 060 090 120 and so on up to 330 6 2 9 Remote Protocol Choice The Nav Com can emulate either the Apollo SL30 Nav Com or the Garmin GNC255 Nav Com This allows compatibility with a wide range of third party systems If availab...

Page 53: ...ed on the screen by a bar being filled in higher values being represented by more of the bar being filled Even with the radio squelch at its highest setting the unit will still meet its operating performance requirements The radio range will not be significantly affected at maximum squelch 6 2 14 Audio Test Tones The audio test tones provide a simple way of testing that the installation is correct...

Page 54: ... ambient light sensor Depending on the amount of light spill in the cockpit and the brightness of other adjacent avionics displays it may be necessary to adjust the darkest setting of the backlight to best match other equipment and to improve the cockpit appearance at night Note it is only practical to do this in pitch darkness since that is the in flight environment that you are trying to reprodu...

Page 55: ...bleshooting and installation Sense Value from the front panel ambient light sensor Ctrl Value from the aircraft s lighting bus Bus Displays the aircraft s supply voltage as sensed by the Com radio Temp Temperature measured by the TX56 internal temperature sensor CM Number of entries used and available in the Com frequency database NV Number of entries used and available in the Nav frequency databa...

Page 56: ...ents Pay particular attention to flags and superflags DME channelling If used make sure that the DME can be tuned by the Nav Com If no convenient DME station as available on the airfield you may need a DME ramp test set Transmitter operation and microphone gain adjustment Contact a local station and check that they are receiving you clearly Interference check Check the radio with other avionics an...

Page 57: ... The controls are shared between the communication radio and the navigation radio which is being controlled is shown by the size of the corresponding display window In communication radio mode the dividing bar moves to the right and the communication radio window occupies most of the screen When the display looks like that the knobs and buttons control the behaviour of the communication radio In n...

Page 58: ...t the frequency is active and the audio will be heard through the headphone and speaker outputs The standby frequency will only be received during the MONITOR function which is indicated by a 2 icon when active 8 4 Nav Radio Display Press the NAV button to enable Nav display mode Like the Com radio window the primary Nav frequency is on the left and the standby frequency is on the right The right ...

Page 59: ...pressing the OBS button displays a small version of the CDI on the TX56 screen If you don t have any CDI connected to the TX56 this mode provides a built in deviation instrument The left right movement of the on screen needle indicates the course position relative to the aircraft position When the needle is in the middle the aircraft is on the selected course A To From flag will be shown to indica...

Page 60: ...w bearings to the beacon Pressing again will toggle back to displaying the radial from the beacon 8 7 Localizer Back Course Approaches In some parts of the world there are approaches based on tracking a localizer back course The TX56 can automatically reverse the course indications for you so that the CDI needle works in the correct sense If a localizer frequency is active on the primary Nav chann...

Page 61: ...de of Morse code identifiers does not depend on the setting of the audio output 8 9 Com Radio Tuning Step Size When tuning in Com mode pressing the end of the tuning 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 operatio...

Page 62: ...e secondary channel will appear slightly quieter than the primary If your radio is wired for stereo and you are using a stereo headset the secondary channel will also appear to be to the right of the primary channel 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 When the Nav mode is a...

Page 63: ...e shown on a small CDI display while the secondary VOR is also decoded and displayed Nav dual frequency operation is not possible if the primary CDI has a built in converter such as a legacy CDI or an Aspen PFD During dual frequency operation you cannot listen to the Ident for verification and the TX56 will not identify the beacon for you You should always verify you have the correct beacons tuned...

Page 64: ...function through the configuration menu 8 13 Frequency Database The TX56 has up to three types of database containing frequencies and station identifiers for both Com and Nav frequencies One is stored in the radio and configured by the pilot it will always be available One is a list of the ten most recently used frequencies it will be populated automatically as you use the radio The third is only ...

Page 65: ...rently selected result into the standby frequency and returns to the normal operating screen Pressing the Flip Flop button puts the currently selected result into the active frequency instead and returns to the normal operating screen 8 14 Recent Frequencies There is also a memory of the ten most recent frequencies that you have used From the initial memory screen move the cursor using the large k...

Page 66: ... data source The only difference is that airfield and beacon identifiers are usually ordered by how close they are to your route rather than alphabetical order 8 16 Entering New Frequencies You can add station identifiers and frequencies to the internal databases which store up to 250 entries The process is the same for Com and Nav databases To edit the database go into memory mode by pressing the...

Page 67: ...s numbers or facility type in the current entry Pressing MEM will save that changed entry If you choose DELETE and press MEM the current entry will be deleted If you get this far and realise that you did not want to change the database at all select CANCEL and then press MEM you will be returned to the normal memory mode 8 17 Saving and Loading the Frequency Database The frequency database entries...

Page 68: ...d by holding down the MON button for 3 seconds The menu options can be selected using the larger tuning knob and the parameter value can be altered using the smaller tuning knob Intercom Volume Sets the intercom volume level Intercom Squelch Sets the sensitivity of the intercom voice operated squelch Music Volume Sets the volume level of the music input Music Muting Mutes the music audio when a VH...

Page 69: ...te the message on the screen and pass that information to your avionics maintenance organisation Press the flip flop button to clear the message The following warnings may be seen Radio Hot The radio is overheating Stuck Mic A PTT switch has been closed for more than 35 seconds and the transmitter has stopped to avoid blocking the channel Low Volt The aircraft power input is below 10 volts TX56 56...

Page 70: ...21 Fault Annunciation If the VHF radio detects a catastrophic internal failure the screen will indicate FAULT and a brief statement of the problem Note the FAULT message at the bottom of the screen and pass that information to your avionics maintenance organisation The fault may be cleared by re cycling the power to the radio but if the fault is still present the message will reappear ...

Page 71: ...ecessary 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 service procedures 9 1 Cleaning the Front Panel The front panel body and switches sh...

Page 72: ...O B Trig Avionics Limited Trig Avionics Europe B V Heriot Watt Research Park Hardwareweg 3 Riccarton Edinburgh EH14 4AP 3821 BL Amersfoort Netherlands 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 imp...

Page 73: ...ival 4 5 1 55 C Low temperature operating 4 5 2 20 C High temperature operating 4 5 4 55 C High temperature short time operating 4 5 3 70 C 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 55 000 feet Decompression 4 6 2 8 000 to 55 000 feet in 15 seconds Overpressure 4 6 3 15000 feet Temperature Variation ...

Page 74: ...t 15 0 Equipment tested to Category Z Power Input 16 0 Equipment tested to Category BX Voltage Spike 17 0 Equipment tested to Category B Audio frequency conducted susceptibility 18 0 Equipment tested to Category B Induced signal susceptibility 19 0 Equipment tested to Category AC Radio frequency susceptibility 20 0 Equipment tested to Category TT Radio frequency emission 21 0 Equipment tested to C...

Page 75: ...C High temperature operating 4 5 4 55 C High temperature short time operating 4 5 3 70 C 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 55 000 feet Decompression 4 6 2 8 000 to 55 000 feet in 15 seconds Overpressure 4 6 3 15000 feet Temperature Variation 5 0 Equipment tested to Category C Humidity 6 0 Equ...

Page 76: ...ry Z Power Input 16 0 Equipment tested to Category BX Voltage Spike 17 0 Equipment tested to Category B Audio frequency conducted susceptibility 18 0 Equipment tested to Category B Induced signal susceptibility 19 0 Equipment tested to Category AC Radio frequency susceptibility 20 0 Equipment tested to Category TT Radio frequency emission 21 0 Equipment tested to Category B Lightning induced trans...

Page 77: ... High temperature operating 4 5 4 55 C High temperature short time operating 4 5 3 70 C 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 55 000 feet Decompression 4 6 2 8 000 to 55 000 feet in 15 seconds Overpressure 4 6 3 15000 feet Temperature Variation 5 0 Equipment tested to Category C Humidity 6 0 Equi...

Page 78: ...ry Z Power Input 16 0 Equipment tested to Category BX Voltage Spike 17 0 Equipment tested to Category B Audio frequency conducted susceptibility 18 0 Equipment tested to Category B Induced signal susceptibility 19 0 Equipment tested to Category AC Radio frequency susceptibility 20 0 Equipment tested to Category TT Radio frequency emission 21 0 Equipment tested to Category B Lightning induced trans...

Page 79: ...C High temperature operating 4 5 4 55 C High temperature short time operating 4 5 3 70 C 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 55 000 feet Decompression 4 6 2 8 000 to 55 000 feet in 15 seconds Overpressure 4 6 3 15000 feet Temperature Variation 5 0 Equipment tested to Category C Humidity 6 0 Equ...

Page 80: ...ry Z Power Input 16 0 Equipment tested to Category BX Voltage Spike 17 0 Equipment tested to Category B Audio frequency conducted susceptibility 18 0 Equipment tested to Category B Induced signal susceptibility 19 0 Equipment tested to Category AC Radio frequency susceptibility 20 0 Equipment tested to Category TT Radio frequency emission 21 0 Equipment tested to Category B Lightning induced trans...

Page 81: ...________________ Trig Avionics Page 73 12 Installation Drawings Dimensions in are millimetres dimensions in are inches 158 90 mm CUT OUT DIMENSIONS FOR BEHIND AIRCRAFT PANEL MOUNT 31 50 mm 160 30 mm CUT OUT DIMENSIONS FOR FRONT AIRCRAFT PANEL MOUNT 33 80 mm CENTER OF GRAVITY COG ...

Page 82: ...stallation Manual 5 April 2022 01776 00 01 Issue AD ______________________ Page 74 Trig Avionics ITEM DESCRIPTION QTY 1 TX56 Nav Com 1 2 TX56 Mounting Tray 1 3 TX56 Mounting Tray Back Plate 1 4 Screw M2 5 x 8mm pan Pozidriv 2 ...

Page 83: ...Avionics Page 75 13 Wiring Diagrams Figure 1 Overview of Typical Installation 77 Figure 2 Stand alone Installation no Audio Panel 78 Figure 3 Arrangements for VOR LOC GS Antenna Feed 79 Figure 4 Channelling King panel mount serial DME 80 Figure 5 Audio Panel Connections 81 Figure 6 CDI Connections 82 ...

Page 84: ...TX56 56A and TX57 57A Installation Manual 5 April 2022 01776 00 01 Issue AD ______________________ Page 76 Trig Avionics This page intentionally left blank ...

Page 85: ...v Com BNC BNC 4 5 6 7 8 9 10 11 12 13 25 26 32 30 39 40 43 44 41 42 1 17 5A CIRCUIT BREAKER 11 33V AIRCRAFT POWER AIRCRAFT GROUND 11 33V AIRCRAFT POWER LIGHTING BUS 14V or 28V MOUNTING TRAY GROUND STUDS COM ANTENNA NAV ANTENNA 3A CIRCUIT BREAKER RS232 OUT RS232 IN GROUND MFD GPS COM1 MIC KEY COM1 MIC AUDIO HI COM1 MIC AUDIO LO COM1 AUDIO IN HI COM1 AUDIO IN LO NAV1 AUDIO IN HI NAV1 AUDIO IN LO Aud...

Page 86: ...PUT LIGHTING BUS 14V or 28V PILOTS PTT COPILOTS PTT CABIN SPEAKER PILOTS HEADPHONES COPILOTS HEADPHONES PILOTS MICROPHONE COPILOTS MICROPHONE MOUNTING TRAY GROUND STUDS COM ANTENNA NAV ANTENNA 3A CIRCUIT BREAKER 1 2 3 25 Way Notes All wires 24 AWG or larger except Com power and ground 20 AWG Nav power and ground 22 AWG 1 Auxiliary audio input can be used for alert tones 2 Intercom is enabled when ...

Page 87: ...S TX56 Nav Com NAV NAV ANT GLIDE 1 S 2 1 S 2 VOR LOC Antenna VOR LOC Antenna Glideslope Antenna VOR LOC Antenna Glideslope Antenna Glideslope Antenna VOR LOC GS Antenna VOR LOC GS Antenna VOR LOC GS Antenna Diplexer Splitter Splitter Splitter Splitter Splitter Diplexer Diplexer Diplexer Notes All RF connections shown are coaxial cable Recommended splitter is Minicircuits ZFSC 2 1 B Trig Avionics p...

Page 88: ...AN REQ DME COMMON RNAV MODE 36 35 37 38 23 TX56 Nav Com 2 NAV 2 NAV 1 MOUNTING TRAY GROUND STUDS MOUNTING TRAY GROUND STUDS 44 Way 44 Way 25 Way 4 25 Way Notes A single DME can be channelled from two Nav receivers by connecting the clock data and channel request lines together and providing a switch for the DME common line Only the TX56 that receives DME common will respond to the DME With a singl...

Page 89: ...ND LUG P H R V GND LUG 12 13 GND LUG 9 13 10 14 11 15 12 30 GND LUG 17 19 18 20 4 5 21 22 37 39 38 40 GND LUG 7 8 24 25 6 36 20 35 4 34 5 21 24 8 23 24 9 10 GND LUG P H R V GND LUG 12 13 GND LUG T 16 GND LUG 3 E C H GND LUG P 13 GND LUG T 16 GND LUG 3 E C H GND LUG P 13 GND LUG 9 13 10 14 11 15 12 30 GND LUG 17 19 18 20 9 10 GND LUG P H R V GND LUG 12 13 GND LUG 6 36 20 35 4 34 5 21 24 8 23 24 9 1...

Page 90: ...ATOR G TX56 Nav Com Trig Bendix King TI106 12 11 13 14 9 10 7 8 15 16 18 1 2 3 5 4 6 17 24 6 7 8 9 10 11 12 13 25 26 32 31 14 15 39 40 43 44 41 42 KI204 k m H J K Y CDI Model RIGHT LEFT UP DOWN TO FROM NAV Valid NAV Valid GS Valid GS Valid BC Annun ILS Energ Composite Comp Gnd Res H Res C Res D Res E Res F Res G GPS Annun NAV Annun KI206 KI209 3 6 9 12 4 2 j n k m e S N F H J c Z L P T W Garmin GI...

Page 91: ...top computer CSV files can be edited using a simple text editor or they can be opened by most spreadsheet software The Com radio database is always loaded from and stored to a file called TRIGCOM CSV The Nav radio database is always loaded from and stored to a file called TRIGNAV CSV both are located in the root directory of the USB stick 14 2 Com Frequencies Airfield frequencies are stored as an ...

Page 92: ...F ATF APPR APPROACH ARRV ARRIVAL AWS AWS CLRC CLEARANCE CTAF CTAF DPRT DEPART FSS FSS RFSS RFSS UNIC UNICOM MNDF MANDATORY CTRL CONTROL RADR RADAR ZONE ZONE TALK TALKDOWN INFO INFORMATION RDIO RADIO Frequencies are written in the usual manner the MHz number should be between 118 and 137 MHz whilst the kHz value should normally contain 3 digits although trailing zeroes can be omitted ...

Page 93: ...Y For example TLA 113 80 ITH 108 90 24 The identifier can be up to four characters Identifiers longer than four characters will be truncated 14 4 USB Compatibility Although intended as a generic USB interface not all memory sticks will work in the TX56 TX57 A Trig branded USB stick is supplied with each radio the Trig USB stick will work correctly The USB socket is not intended for other functions...

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