Technisonic TFM-138 VHF/FM TRANSCEIVER User Manual D PDF 98re243 7

Technisonic Industries Limited VHF/FM TRANSCEIVER D PDF 98re243 7

USER MANUAL 3 OF 4

VHF/UHF FMAIRBORNE TRANSCEIVERMODEL TFM-500(P/N’s 971083-1,3 -VHF Guard Module)Installation and Operating InstructionsTil Document No.98RE243Rev. N/CIssue 7August 2002Technisonic Industries Limited240 Traders Boulevard, Mississauga, Ontario L4Z 1W7 Tel:(905)890-2113 Fax:(905)890-5338www.til.ca
CAUTIONThis unit contains static sensitive devices. Wear a grounded wrist strap and/or conductive gloves whenhandling printed circuit boards.NOTE: This equipment has been tested and found to comply with the limits fora Class A digital device, pursuant to Part 15 of the FCC Rules. These limits aredesigned to provide reasonable protection against harmful interference whenthe equipment is operated in a commercial environment. This equipmentgenerates, uses, and can radiate radio frequency energy and, if not installedand used in accordance with the instruction manual, may cause harmfulinterference to radio communcations. Operation of this equipment in aresidential area is likely to cause harmful interference in which case the userwill be required to correct the interference at his own expense.Warning:Changes or modifications not expressly approved by Technisonic Industries could voidthe user’s authority to operate the equipment.WARRANTY INFORMATIONThe Model TFM-500, Transceiver is under warranty for one year from date of purchase. Failed unitscaused by defective parts, or workmanship should be returned to:Technisonic Industries Limited240 Traders BoulevardMississauga,Ontario L4Z 1W7Tel: (905) 890-2113 Fax: (905) 890-5338A Page
Summary of DO-160C Environmental Testing for Technisonic Model TFM-500, VHF and UHFTransceiver:Conditions Section Description of Conducted TestsTemperature and Altitude 4.0 Equipment tested to categories B2 andD1.Vibration 8.0 Equipment is tested without shockmounts to categories B, M and N.Magnetic Effect 15.0 Equipment is class A.Power Input 16.0 Equipment tested to category B.Voltage Spike 17.0 Equipment tested to category B.RF Emission 21.0 Equipment tested to category Z.Installation Approval NotePresently no TSO standard exists for airborne FM transceivers. To make it easier for installationagencies to provide their customers with an approved installation supported by an effectiveAirworthiness Approval, Technisonic has secured Supplemental Type Certificate (STC) Approvals (bothUS and Canadian) on its Airborne FM products for many helicopters currently being delivered in theUS and Canada as well as a number of single engine fixed wing aircraft. The above referenced DO-160C test data is also on file and available from Technisonic to support approval requirements inairframes for which Technisonic does not possess an STC.Approved aircraft types are listed in the attachments to the formal STC documents. These STC's arethe exclusive property of Technisonic and require the written authority of Technisonic for their use.To assist Factory Authorized Technisonic Dealers in the certification process, we have placed copiesof our Canadian and US STC's on our web site along with a letter of authorization for their use. Thesedocuments may be downloaded and used as support for the technical submission to FAA or TransportCanada. Only factory authorized dealers/installers are permitted to download and make use of thesedocuments on behalf of their customers (end users) in support of regulatory agency approval. Pleaserefer to the Technisonic web site www.til.ca for the latest issue of available STC’s and letter ofauthorization for use.B page
TABLE OF CONTENTSParagraph Title PageSECTION 1 GENERAL DESCRIPTION1.1 Introduction ...............................................1-11.2 Description ...............................................1-11.3 Purpose of Equipment ........................................1-11.4 Model Variation ............................................1-11.5 Technical Summary ..........................................1-2SECTION 2 OPERATING INSTRUCTIONS2.1 Features .................................................2-12.2 Operating Instructions ........................................2-32.3 Programming Instructions .....................................2-42.4 Priority and Selective Memory Channel Scanning .....................2-42.5 Scanning Function .......................................... 2-52.6 Direct Frequency Entry Mode ...................................2-52.7 Receive Frequency Simplex Function ..............................2-52.8 Keyboard Lockout Function ....................................2-62.9 Variable Frequency Mode Function ...............................2-62.10 LED Display Variable Dimming Mode ..............................2-62.11 90 Second Transmitter Time Out Feature ..........................2-62.12 Quick Guard Programming Feature ...............................2-62.13 Programming CTCSS Tones ....................................2-72.14 PC Memory/Programming Download Capability .......................2-8SECTION 3 INSTALLATION INSTRUCTIONS3.1 General ..................................................3-13.2 Equipment Packing Log .......................................3-13.3 Transceiver Installation .......................................3-13.4 Installation Kit - Contents ..................................... 3-13.5 Antenna Installation .........................................3-13.6 Installation - Pin Locations and Connections .........................3-13.7 Wiring Instructions ..........................................3-33.7.1 Main Power +28VDC ........................................ 3-33.7.2 Main Ground .............................................. 3-33.7.3 PTT (Ground Keying) .........................................3-33.7.4 Front Panel Back Lighting ..................................... 3-53.7.5 Audio Outputs (600 and 4 Ohms) ................................3-53.7.6 Audio Output Ground ........................................ 3-53.7.7 Mic Signal Input ............................................ 3-53.7.8 Memory Up/Memory Down ....................................3-53.7.9 Data Input ................................................3-53.8 Internal Programming and Guard Enable/Disable Jumper ................3-53.9 Transmitter Power Adjustments .................................3-73.10 Transmitter Microphone Level Adjustment .......................... 3-73.11 Main and Guard Squelch Adjustment ..............................3-93.12 Transmitter Deviation Adjustment ................................3-93.13 Guard Receiver Audio Limit Feature ..............................3-9i
LIST OF TABLES Table No. Title Page3-1 9-pin D and 15-Pin D Connections ............................... 3-3LIST OF ILLUSTRATIONSFigure No. Title Page2-1 Operator's Switches and Controls ................................ 2-32-2 PC Up/Download Cable - Wiring Diagram .......................... 2-123-1 Outline Drawing ............................................ 3-23-2 Wiring Connections ..........................................3-43-3 Interal Enable/Disable Jumper Locations ...........................3-73-4 External Adjustment Access Holes ............................... 3-83-5 VHF Deviation Adjustment Potentiometer Location ................... 3-103-6 UHF Deviation Adjustment Potentiometer Location ................... 3-10ii
1-1SECTION 1GENERAL DESCRIPTION1.1 INTRODUCTIONThis publication provides operating and installation information on the TFM-500 Transceiver.manufactured by Technisonic Industries Limited. The unit offers an extended frequency rangewith selectable channel spacing and is intended for use (in the U.S.) only by governmentagencies or contractors thereto, who have obtained licensing for operation in the 138-150 MHzportion of the band. If the TFM-500 transceiver is used in CANADA, VHF operation isrestricted to the following sub bands: 138-144, 148-148.99, 149.005-150.005 and 150.05-174 MHz.1.2 DESCRIPTIONThe TFM-500, Transceiver is a frequency agile, fully synthesized airborne transceivercapable of operating in the 138 to 174 MHz and 403 to 512 MHz frequency range in 2.5 kHzincrements with either 25 kHz or 12.5 kHz channel spacing. The Transceiver can operatewithout restriction on any split frequency pair in either band and also incorporates a twochannel VHF synthesized guard receiver.The TFM-500 Transceiver provides 200 operator accessible memory positions per band, eachof which is capable of storing a transmit frequency, receive frequency, transmit frequencyCTCSS tone or DPL code, receive frequency CTCSS tone or DPL code, an alphanumericidentifier for each channel and wideband (25 kHz) or narrowband (12.5 kHz) channel spacingassignment. Operating frequency and other related data are presented on a 96 character, fourline LED matrix display. Data entry and function control are performed via a 12 button keypad.Preset channels may also be scrolled and scanned through keypad function activation. Datamay also be entered via a Windows 95/98/NT/2000/ME based computer with the providedsoftware and optional PC Up/download cable, P/N 993390-1.1.3 PURPOSE OF EQUIPMENTThe TFM-500, VHF/UHF FM Transceiver is designed to provide secondary airbornecommunications to facilitate operations which are typically performed in a low altitudeenvironment. The transmitter sections of this unit have a minimum of 8 watts and do notexceed 10 watts output power, which may be reduced by a front panel switch to 1 watt, inorder to reduce interference to land based systems.1.4 MODEL VARIATIONThere are four variations of the Model TFM-500 Transceiver. All units offer identical featuresand performance except for the following differences:TFM-500, P/N 971083-1 GREEN display and 28 Volt back lighting.TFM-500, P/N 971083-1 (5V), GREEN display and 5 Volt back lighting.TFM-500, P/N 971083-3 RED display and 28 Volt back ligting.TFM-500, P/N 971083-3 (5V), RED display and 5 Volt back lighting.Both P/N's 971083-1 and 971083-3 are always provided with 28 Volt back lighting unless aspecific request is made for 5 Volt AC operation.
1-21.5 TECHNICAL CHARACTERISTICSSpecification CharacteristicGENERALModel Designation: TFM-500Frequency Range: 138 to 174 and 403 to 512 MHzTuning Increments: 2.5 kHzOperating Mode: F3E simplex or semi-duplexChannel Spacing: 25 or 12.5 kHz Physical Dimensions (including heatsink): Approx. 8.0" X 3.0" X 5.75"Weight: Approx. 5.1 Lbs (2.3 Kg)Mounting: Panel Mount via Dzus fastnersOperating Temperature Range: -40EC to +60ECPower Requirement:Voltage: 28.0 Vdc, ± 15%Current: Receive - 1.0 A Max.1 Watt Transmit - 2.0 A Max.8-10 Watt Transmit - 3.2 A Max.8-10 Watt Dual Trans - 5 A Max.Frequency Selection: 200 memories per bandprogrammed with:a) Tx Frequency/Rx Frequencyb) Tx/Rx CTCSS tone or DPL codec) 9 character alpha numeric titleGuard Receiver: 2 channels programmed with:a) Tx Frequency/Rx Frequencyb) Tx CTCSS tone or DPL codec) 9 character alpha numeric title CTCSS squelch/encoder: All CTCSS tones availableDPL digital squelch/encoder: All standard DPL codesDTMF encoder: All standard DTMF tonesAudio Outputs: 0.5 Watts into 600 ohmsSpeaker Output: 2.5 Watts min. into 4 ohmsBack Lighting: 28 Volts (standard) or 5 Volts (specify)Display Colour: Green (standard) or Red (specify)DPL is a trademark of Motorola Corporation
1-31.5 TECHNICAL CHARACTERISTICS (continued)VHF RECEIVERSensitivity at 12 dB SINAD Better than 0.35 µVAdjacent Channel Selectivity -75 dB (25 kHz)-70 dB (12.5 kHz)Spurious Attenuation -90 dBThird Order Intermodulation -70 dBImage Attenuation -80 dBFM Acceptance ± 6 kHzHum and Noise Better than 45 dBAudio Distortion less than 5%Antenna Conducted Emission less than -70 dBmUHF RECEIVERSensitivity at 12 dB SINAD Better than 0.35 µVAdjacent Channel Selectivity -70 dB (25 kHz)-60 dB (12.5 kHz)Spurious Attenuation -80 dBThird Order Intermodulation -70 dBImage Attenuation -60 dBFM Acceptance ± 6 kHzHum and Noise Better than 40 dBAudio Distortion less than 5%Antenna Conducted Emission less than -70 dBmGUARD RECEIVERAll specifications identical to VHF receiver
1-4VHF and UHF TRANSMITTERRF Power Output 1 watt or 10 wattsOutput Impedance 50 ohmsMaximum Deviation ±5 kHz (25 kHz mode)(In narrowband mode) ±2.5 kHz(12.5kHz mode)Spurious Attenuation -90 dB below carrier levelFrequency Stability ± 2.5 ppmMicrophone Circuit Carbon or equivalentSidetone Output 0.5W (max) into 600S Harmonic Attenuation -65 dB below carrier levelFM Hum And Noise -40 dBAudio Input 50 mV at 2.5 kHz into 200 S input circuit for ±3.5kHz deviation, adjst. Audio Distortion Less than 5%
2-1SECTION 2OPERATING INSTRUCTIONS2.1 FEATURESThe equipment has several important operating features which provide maximum flexibility,performance and versatility. These features include:1. VHF and UHF bands that can be configured to be operated independently or as a singleunit.2. The unit can be set up as a crossband repeater, linking a VHF and UHF frequency in bothdirections. 3. 200 memory positions per band which can each be programmed with a transmit andreceive frequency with 25 or 12.5 kHz channel spacing, Tx/Rx CTCSS tones or DPL codesand a 9-character alphanumeric title.4. 2 guard channels which can each be programmed with a Rx frequency with 25 or 12.5kHz channel spacing, CTCSS Tx tone or DPL code and a 9-character alphanumeric title.5. Scanning of preprogrammed memories with selective memory scanning, in 5 scan lists. 6. Priority scan of memory channel 1, if desired.7. Direct frequency entry mode.8. Receive frequency simplex function.9. Switchable RF output power between 1 watt and 8-10 watts.10. Lockout of keyboard to prevent inadvertent entries.11. Variable frequency mode to manually scan up and down in 2.5 kHz steps.12. LED display variable dimming mode.13. Selectable 90 second Tx time out feature.14. Quick download of any of the VHF memory positions to the guard memories. 15. PC Memory Upload or Download capability.16. Configuration Menu - Pressing ENTER, RCL and FUNC together while turning the radio on will put it into configuration mode.The programming features affected are:a) DPL - Can be turned on or off with th MUP and MDN (4 and 7) keys. This onlyremoves the DPL entry step from the programming sequence and does notstop memories that already have DPL codes from working. This also applies tothe rest of the on/off configurable items.b) Scan - Can be disabled. Selecting FUNC and SCAN will do nothing if Scan is off. Thescan list indicator (+) will still display if was previously programmed.c) Rx CTCSS - Can be turned on or off from the programming sequence. This affects only the CTCSS tones for receive.d) FUNC 7 - Can be turned on or off. When off, the main memory channel can not bedumped into one of the guard channels using function 7.e) LAST MEM - If set to on, the last memory channel on the display will be what comesup when the radio is turned on. If set to off, the last memory that changeswere made to will be what comes up when the unit is switched on.f) DUALMODE - If set to on, the UHF and VHF bands are operated independently andsimultaneously. The radio is shipped with this feature OFF.
2-2g) SIDETONE - The TX audio circuit becomes active allowing you to adjust the sidetonelevel with the VHF volume knob. When thedesired level is reached, pressENTER and this level will be set for both VHF and UHF bands. The factorysetting is 23.Note: You must set the side tone every time you go through the configurationmenu since the position of the knob is taken as the new level regardless ofwhether or not you made an adjustment.FIGURE 2-1 Operator's Switches and Controls
2-32.2 OPERATING INSTRUCTIONS (See Figure 2-1)1. Switch power on by turning the main volume clockwise. Depending how the radio isconfigured, either the last programmed or last displayed frequencies will appear on thescreen. The transceiver is now in normal operating mode.2. Adjust the audio level by adjusting the VHF, UHF and GUARD volume knobs.3. Pressing the squelch defeat button will open all receivers to confirm they work.4. Read the display. The top line will indicate which VHF memory is selected followed by a"+" if the memory position is included in a scan list, an alphanumeric message, and thefrequency of the VHF receiver. A small "n" before the frequency indicates 12.5 kHznarrowband channel spacing is in effect on this memory position. In the receive mode, thefrequency is followed by an "RT" if a RX CTCSS tone or RX DPL code is programmed, oran "RX" if no Receive tone/code is programmed. Similarily, in the transmit mode either a"TT" or "TX" is shown after the frequency. The second line shows the same informationfor the UHF band. The third line indicates information about the guard receiver.5. Only TX CTCSS tones or TX DPL codes may be programmed for the guard receiver.At the beginning of each line, an LED indicates open squelch. 6. Set the VHF/UHF/GD switch to the desired band.7. Set the G1/G2 switch to the desired guard channel.8. Set the HI/LO switch to the desired RF output power.9. Select the desired memory by using the M.UP and M.DN buttons, or the RCL buttonand a three digit number followed by ENTER.10. To transmit DTMF tones, use the keyboard keys while holding the PTT button on themicrophone. There is a 5 second PTT delay after pressing a key so that you may pressseveral DTMF keys in sequence without having to hold the PTT. The keyboard returns toits normal function when the PTT is released.The display always shows the status of both receivers and the transmitter. The light at the leftof each line indicates which receiver is receiving. The display also indicates the memorychannel in use and the guard channel in use. A "TX" (no TX tone/codes programmed) or"TT"(either TX tone or code programmed) on the right side of the display indicates which bandis active when transmitting. The transmit frequency is also shown. In the receive mode thedisplay shows “RX” beside the receive frequency if no RX tone or DPL code is programmedand “RT” if a CTCSS tone or DPL code is programmed.While in any programming mode, all receivers continue to function.When the transceiver is in either of the operating frequency or CTCSS tone/DPL codeprogramming modes and you must respond to a call, click the microphone PTT once (the radiowill not transmit during this click). This will cause the transceiver to revert back to the normaloperating mode and communications with the caller can proceed in the usual fashion.2.3 PROGRAMMING INSTRUCTIONSTo program one of the 200 memory channels in one of the bands:1. Select the desired band on the band select (VHF/UHF/GD) switch. This is required beforeany of the programming modes or functions.
2-42. Press the FUNC key. The display will show the function prompt.3. Press the PROG key. The display will show the current receive frequency with a flashingcurser on the first or second digit (The first digit is always a one <1> on the VHF band).4. Type in the desired receive frequency. If you type in a frequency which is not a 2.5 kHzstep, the nearest valid frequency will be automatically selected.5. The curser will return to the second digit. You can retype the frequency if you have made an error or press ENTER to continue.6. The transmit frequency will be displayed with the curser on the seconddigit. Follow the same method as in step 3 and 4.7. The channel spacing increment of either 25.0 or 12.5 kHz is now displayed. Use theM.UP and M.DN keys to select the desired channel spacing for the memory position,then press ENTER. 8. The alpha-numeric title is now displayed. Use the M.UP and M.DN keys to scrollthrough the alphabet, numbers and symbols. When the desired character is displayed,press ENTER to advance to the next character. Press “1" to backspace.9. Keep repeating step six until the last space is set. The display will show SCAN orLOCKOUT to enable this memory position as part of a scan list or lock it out of thescan list. Use the 1,2,3,4,5 and M.DN keys to toggle between these functions (fordetails see paragraph 2.5). Once the desired condition has been selected, press ENTER.The TFM-500’s display will show a "+" beside the memory channel number if scanis enabled.10. The display will now show the current memory number. Type in the 3-digit number ofthe memory you want to save to (if different from displayed one) and press ENTER.11. You now have the option to program the guard frequencies by pressing FUNC or pressENTER to return to normal operating mode.12. If you pressed FUNC to program the guards, guard"1" transmit frequency will bedisplayed with the flashing curser on the second digit. Enter the frequencies for guard"1" receive/transmit and guard"2" receive/transmit as in step 3 and 4.13. The alphanumeric labels for guard"1" and guard"2" are entered the same as in step 7and 8. When the last character is entered, the radio returns to normal operating mode.2.4 PRIORITY SCANNING, SELECTIVE MEMORY CHANNEL SCANNING AND SCAN LISTSInstead of breaking up the 200 channels into blocks for scanning, the TFM-500 has 5 scanlists per band. Any of the 200 channels can be assigned to any one or more of these 5 scanlists. This means the channels do not have to be repeated for them to be in more than oneblock and that you are not limited to the number of channels that you can scan at once.The priority memory channel is always memory position number 1. The priority memorychannel is scanned every other step (ie. 121314151...) to ensure that no incoming messagesare missed. The priority channel can be locked out, which will result in the normal scanningof the other memory positions.
2-5Selective memory scanning allows the user to select which of the 200 memory channels areto be scanned or locked out when the scan function is invoked. To use this feature, followthe PROGRAMMING INSTRUCTIONS found in paragraph 2.3. Once the screen displays SCANor LOCKOUT, use the 1,2,3,4,5 or M.DN keys to toggle to the desired condition. The MDNbutton acts as a clear while pressing one or more of the above numbers adds the memory tothe corresponding scan list or lists. Press ENTER when you are happy with your selection. Innormal operating mode the display will later show a "+" beside the memory channel numberif it has been included in any of the 5 scan lists.NOTE: Scanning can only be performed on one band (either VHF or UHF) at a time. When thetransceiver is in the single mode (combined VHF and UHF audio) and the scan feature has beeninvoked on one band, it will be interrupted when transmitting on the other band. In the Dualmode, you are able to transmit on the second band without effecting the scan function on thefirst.2.5 SCANNING FUNCTION (5 second talkback delay)Select the band you wish to scan with the band switch. (you can not scan the guard)To start scanning of the memory channels, press FUNC then SCAN and then the number(1,2,3,4,5) of the desired scan list.The radio will scan through all the preset memory positions in the selected scan list (see aboveparagraph for priority and selective scan features) and will lock on to the first active channelin the scan sequence. It will remain on the channel until it becomes inactive. Scanning willresume again after five seconds of inactivity. To exit the scan mode, press the SCAN key. Thiswill cause the radio to revert back to the normal operating mode. If while scanning, you hear a call for you:1. Respond to the call within 5 seconds. When scanning is interrupted by an incoming signal, the channel will remain open for five seconds before resuming scanning.2. During communications the five second timer is reset from the last Rx or Tx signal encountered.The radio resumes scanning once the Rx or Tx activity has ceased for more than five seconds.The SCAN key must be pressed to exit the scan mode.2.6 DIRECT FREQUENCY ENTRY MODEThis mode is designed to facilitate quick frequency selection during emergency and otheroperational conditions requiring direct operating frequency selection. This operating mode isdisabled along with the programming mode when the internal disable jumper is set.1. When the transceiver is in the normal operating mode, press FUNC and the desiredoperating frequency ie/ 153.2750.2. On the UHF band press FUNC and then 1 and the desired frequency ie/ 443.5500.3. You will then be asked for 12.5 or 25.0 kHz channel spacing. Select with MUP or MDNand press ENTER.Please note in the above operation, after FUNC and "1" are entered, the LED display willshow memory channel "000" and then the remaining digits in the desired frequency are shownas they are entered. No alphanumeric message can be entered in this mode. Operation on thenew frequency occurs in both transmit and receive (simplex only) modes. If RX or TX CTCSStones/DPL codes are required they must be programmed in afterwards.2.7 RECEIVE FREQUENCY SIMPLEX FUNCTIONThe receive frequency simplex function allows you to quickly change the transmit frequency,when operating on a split pair (repeater/semi-duplex mode), to the receive frequency to allow
2-6direct communications. ie/ If you are transmitting on 152.000 MHz and receiving 152.555MHz, select VHF on the band select switch and press FUNC then UP to transmit on 152.555MHz. To return to the split pair condition, you must recall the memory channel again. This isquickly done by pressing M.UP for one step up, then back down one step with the M.DN key.2.8 KEYBOARD LOCKOUT FUNCTION The keyboard can be locked out so that accidental pressing of keys does not changefrequency, etc., unknowingly to the operator. To lock the keyboard, press FUNC then LOCK.This will disable all keyboard functions (except keyboard unlock) in the receive mode. TheDTMF function during transmit will not be affected. To unlock the keyboard, press and holdthe LOCK key for two seconds until the display indicates "UNLOCK".2.9 VARIABLE FREQUENCY MODE FUNCTIONTo enter variable frequency mode, press RCL, 0,0,0, then ENTER or enter a frequency in thedirect entry mode described above. The memory channel that you were just in will still be validbut now you can manually adjust the frequency with the M.UP, M.DN, UP and DN keys. TheUP and DN keys will make the frequency count up or down in steps of 2.5 kHz. The M.UP andM.DN keys will make the frequency count up or down in steps of 1 MHz. You can not changethe label. The frequency in this mode can not be stored in memory. To exit this mode, recallone of the 200 memory channels (ie. RCL, 0,0,1). Variable frequency mode is disabled whenthe internal entry disable jumper is set.2.10 LED DISPLAY VARIABLE DIMMING MODE 1. With the transceiver in normal operating mode press the UP or DN keys to increase ordecrease the intensity of the LED display.2. Once maximum intensity of the display is acheived, the UP key no longer functions. Conversely once minimum intensity is reached, the DN key ceases to function.2.11 90 SECOND TRANSMITTER TIME OUT FEATUREA selectable 90 second transmitter time out feature is provided to prevent accidentalcontinuous transmission in the event of a faulty PTT switch. With this feature enabled thetransceiver will stop transmitting after the PTT is engaged continuously for 90 seconds. Thetimer is reset by releasing then re-engaging the PTT switch.Press the FUNC then the M.UP key. Use the M.UP and M.DN keys to select 90 SEC, whichenables the feature, or NONE which disables it.2.12 QUICK GUARD PROGRAMMING FEATUREA quick download of any of the 200 VHF memory positions into either of the guard memorypositions can be accomplished. Select the memory position whose contents you desire todownload to a guard memory. Select either GD1 or GD2 memory channel as desired. PressFUNC then 7. The guard memory channel will now contain all the same information as theselected memory position. This feature is disabled when the FUNC 7 mode is turned off in theconfiguration menu.2.13 PROGRAMMING CTCSS TONES/DPL CODESCTCSS tones (PL tones) or Digital DPL codes can be assigned to each memory channel. Theguard receiver squelch will operate on noise squelch only, but guard 1 and 2 transmit tonesor codes can be programmed. To program a tone/code to a memory channel:1. Select the desired band on the band select switch.
2-72. Use the M.UP and M.DN keys to select the memory channel that you want to assign a CTCSS tone or DPL code.3. Press the FUNC key then the TONE key. The display will show "RX TONE:" and the current tone number, as well as the tone frequency in Hz.4. Use the M.UP and M.DN keys to select the tone number you require. The following is a list of the available CTCSS tones: Number Tone Number Tone Number Tone 01 67.0 26 162.2 51 177.3* 02 71.9 27 167.9 52 183.5* 03 74.4 28 173.8 53 189.9* 04 77.0 29 179.9 54 196.6* 05 79.7 30 186.2 55 199.5* 06 82.5 31 192.8 56 206.5* 07 85.4 32 203.5 57 210.7* 08 88.5 33 33.0* 58 218.1* 09 91.5 34 35.4* 59 225.7* 10 94.8 35 36.6* 60 229.1* 11 97.4 36 37.9* 61 233.6* 12 100.0 37 39.6* 62 241.8* 13 103.5 38 44.4* 63 250.3* 14 107.2 39 47.5* 64 No Tone 15 110.9 40 49.2* (carrier squelch only) 16 114.8 41 51.2* (The tones marked with * are 17 118.8 42 53.0* nonstandard tones). 18 123.0 43 54.9* 19 127.3 44 56.8* 20 131.8 45 58.8* 21 136.5 46 63.0* 22 141.3 47 69.4* 23 146.2 48 159.8* 24 151.4 49 165.5* 25 156.7 50 171.3* 4. Press ENTER. "TX TONE" appears on the display. Repeat step 3.5. Press ENTER. "G1 TONE" appears on the display. Repeat step 3.6. Press ENTER. "G2 TONE" appears on the display. Repeat step 3 and press ENTER.7. The display will now show "RX DPL:" and the current 3-digit DPL code. If no DPL code isrequired "000" should be entered. Please note that if a DPL code is to be programmed aCTCSS tone should not be enabled. 8. Use the keypad to enter the required octal 3-digit DPL (Digital Coded Squelch or DCS) code. A list of all usable and unique octal 3-digit DPL/DCS codes follows:
2-8017* 051 116 156 243 266* 346 431 466 612 721023 053* 122* 162 244 271 351 432 503 624 731025 054 125 165 245 274* 356* 445 506 627 732026 065 131 172 246* 306 364 446* 516 631 734031 071 132 174 251 311 365 452* 523* 632 743032 072 134 205 252* 315 371 454* 526* 654 754036* 073 143 212* 255* 325* 411 455* 532 662043 074 145* 223 261 331 412 462* 546 664047 114 152 225* 263 332* 413 464 565 703050* 115 155 226 265 343 423 465 606 712* indicates GE Digital Coded Squelch (DCS) Code9. Press ENTER. "TX DPL" appears on the display. Repeat step 8.10. Press ENTER. "G1 DPL" appears on the display. Repeat step 8.11. Press ENTER. "G2 DPL" appears on the display. Repeat step 8 and press ENTER.2.14 PC MEMORY PROGRAMMING UP/DOWNLOAD CAPABILITYThe TFM-500 transceiver can be programmed by a Windows based personal computer usingTechnisonic software supplied on CD with each TFM-500.Requirements:1. PC compatible computer with a CD ROM drive, running Windows 95/98/NT/2000/ME.2. Bench power supply of 28 volts DC.3. PC download cable, P/N 993390-1 which can be supplied or made from the wiringdiagram at the back of this section.Connections:1. With the PC turned off, plug the 25 pin male 'D' connector into a serial port. 2. Plug the 9 pin 'D' connector into the back of the TFM-500 transceiver.3. Connect the power supply to the TFM-500. Installing the MultiTDP Program:The CD supplied with each radio contains software for all of Technisonic’s downloadabletransceivers. Place the CD into your drive and use Windows Explorer to open the MultiTDPdirectory on the CD. Double click the MultiTDP_Install.exe file. Follow the onscreen instructionsto install the program onto your hard drive. When the program is installed, it can be run byselecting Programs from your Start menu, then select Technisonic from the submenu andfinally MultiTDP.
2-10 Using the MultiTDP Program:With the program running on your computer, a full MultiTDP instruction manual can be loadedby selecting Documentation in PDF format under the Help menu. Otherwise, to get started, pulldown the File menu and select TFM-500. The program defaults to serial port com1 but can beset to com2, 3 or 4 under the Com Port menu. The program is now ready to use. You maywant to upload data from the radio and edit channels or start a new data file. The VHF andUHF bands are treated as separate radios and must be up or downloaded and editedseparately. Editing is done on a channel by channel basis. Set the channel number you wouldlike to edit and then modify the frequencies, labels, CTCSS tones, DPL codes, wide / narrowband setting and scan lists as desired. Press the Save Record button to store the changesyouv’e made to the data base below. After you have edited the channel list your can save yourchanges to disk and/or download to the radio. Only channels selected with a check mark willdownload. It is recommended to use the Select All command in the Data Transfer menu toensure the data base in the radio matches the one in the PC. When download is selected, amessage box will appear on your screen asking you to press FUNC and DN on the radio. Pressthese buttons on the radio before you click OK in the message box, otherwise the downloadwill fail.TFM-500 Upload/Download Programming CableP/N 993390-1 Wiring DiagramFIGURE 2-2 TFM-500 Transceiver PC Up/Download Cable - wiring diagramNote: If your serial port is a 9 pin connector, instead of the 25 pin use a female 9 pin Dconnector, connecting: Yellow -pin 3Blue -pin 2Black -pin 5
3-1SECTION 3INSTALLATION INSTRUCTIONS3.1 GENERALThis section contains information and instructions for the correct installation of the TFM-500, VHF/FM Transceiver.Make certain that the correct frequencies are preprogrammed in accordance with theequipment user's valid FCC operator's license, prior to installation.3.2 EQUIPMENT PACKING LOGUnpack the equipment and check for any damage that may have occured during transit. Savethe original shipping container for returns due to damage or warranty claims. Check that eachitem on the packing slip has been shipped in the container. Verify that the equipment displayand backlighting configuration are the same as those ordered.3.3 TRANSCEIVER INSTALLATION The TFM-500 transceiver is designed to be Dzus mounted and should be installed inconjunction with a IN-550 installation kit. See Figure 3-1 for an outline drawing of the unitwith dimensions to facilitate the installation. 3.4 INSTALLATION KIT - CONTENTSThe IN-550 installation kit consists of: 1. One 15 pin Cannon D mating connector (female) complete with crimp pins and hood.2. One 9 pin Cannon D mating connector (male) complete with crimp pins and hood.3. Three BNC antenna mating RF connectors (male).3.5 ANTENNA INSTALLATION Antenna, P/N’s ATM-150 and ATM-403 may be obtained from Technisonic Industries Limitedor a suitable equivalent may be utilized with the TFM-500 transceiver. The antenna should bemounted on the bottom of the aircraft whenever possible. Consult with instructions providedwith the antennas. Connect RF cables from antennas to the back of the TFM-500 unit byutilizing the BNC mating connector provided in the installation kit. The UHF connector islocated on the rear, above the 15-pin D connector and the VHF connector is below the 9-pinD.3.6 INSTALLATION - PIN LOCATIONS AND CONNECTIONSThe pin numbers and locations for the 15 pin and 9 pin Cannon D located on the rear of theTFM-500 transceiver are shown below. Pin connections are in provided in TABLE 3-1. Transceiver mounted view of 15 pin female and 9 pin male connector
3-2 FIGURE 3-1 Outline Drawing for Model TFM-500 Transceiver
3-33.6 INSTALLATION - PIN LOCATIONS AND CONNECTIONS (continued) 15 Pin D Connections - Use FEMALE ConnectorPin # Description1600 Ohm Output 12Data Output3Panel Lighting (28VDC or 5VAC) 4Memory Up5Memory Down6Mic Signal Input 17Main Power +28VDC8Main Ground94 ohm Speaker Output10 4 ohm/600 ohm Output Ground11 Data Input12 DF Audio13 PTT 1 (Ground Keying)14 Main Power +28VDC15 Main Ground9 Pin D Connections - Use MALE Connector Pin # Description1600 Ohm Output 22PTT 2 (Ground Keying)3Reset4Background Debug Signal5Ground6Programming Voltage In7Serial Data Out8Serial Data In9Mic Signal Input 2TABLE 3-1
3-4FIGURE 3-2 Wiring connections for the TFM-500 Transceiver
3-53.7 WIRING INSTRUCTIONSFigure 3-2 shows all required connections and recommended wire sizes for the TFM-500Transceiver. If problems with the correct operation of the UHF/FM Transmit function of aTFM-500 are encountered on a specific airframe, a DC power line filter may be required. Typical problems encountered are that UHF/FM will not transmit on high power or will notopen a repeater when using a CTCSS transmit tone. Investigation has determined that oncethe ripple on the airframes DC (28V) power line becomes excessive the UHF transmitfunction and tones will distort. If the airframes generators are turned off and the UHF/FMtransmit function works correctly from 28 Vdc battery power, the ripple on the DC powerline is excessive. The use of DC power line filter PLF-250, p/n 021214-1 is recommendedand is available from Technisonic.3.7.1 Main Power +28VDCThe main power +28VDC (±15%) is connected to pins 7 and 14 of the transceiver. Bothpins should be connected. 3.7.2 Main GroundGround connections are made on pins 8 and 15. Both pins should be connected.3.7.3 PTT (Ground Keying)The PTT line is connected to pin 13 and should be floating when the transceiver is inreceive mode, and grounded during transmit mode. The PTT2 input is on pin 2 of the 9 pinconnecter.3.7.4 Front Panel Back LightingFront panel back lighting connection should be made on pin 3 of the transceiver. Theopposite end of this lead should be connected to the panel lighting system of the aircraft. Before connecting, verify the required panel lighting voltage (28 VDC or 5VAC) on thetransceiver configuration control label.3.7.5 Audio Outputs (600 ohms and 4 0hms)There are two audio outputs available (1 & 2). 600 ohm audio output 1 has audio fromboth bands and the guard in single operator mode. When in dual operator mode, 600 ohmoutput 1 has audio from the VHF band and guard only while the UHF audio will be on the600 ohm output 2.3.7.6 Audio Output Ground Pin 10 is the ground for both the 4 ohm and 600 ohm audio output signals. 3.7.7 Mic Signal InputThe microphone input signal is to be provided on pin 6, utilizing shielded wire with theshield grounded to pin 10. Microphone signal 2 is on pin 6 of the 9-pin D connector.3.7.8 Memory Up/Memory DownRemote scrolling through the 200 memory positions can be achieved by providing a groundto pins 4 (up) and 5 (down) through a momentary contact cyclic switch. The memories willscroll only on the band selected.
3-63.7.9 Data InputData communications equipment requiring direct access to the modulator and discriminatoran be connected via pins 2 and 11. Data cannot be transmitted in CANADA unlessequipment is approved for use with the TFM-500 by the communications regulatoryauthority.3.8 INTERNAL PROGRAMMING AND GUARD ENABLE/DISABLE JUMPER The programming and direct frequency entry modes can be disabled by removing theinternal enable/disable jumper strap from pins 1 and 2 of J10. Removal of this jumper willprevent operation on any frequencies other than those programmed in the 400 memorypositions and two guard receiver memory positions. Removal of the guard receiverprogramming enable /disable jumper strap from pins 1 and 2 of J11 will totally disable theoperator’s ability to re-program the 2 guard receiver channels.The transceiver is always shipped with the two jumpers in the entry enable positions. Toplace either of the jumpers in the disable position:1. Remove the left side of the radio.2. Set or remove jumpers as necessary.3. Re-assemble the radio in the reverse order.Microprocessor Control Unit (MCU) PCB Module:FIGURE 3-3 Internal Enable/Disable Jumper Locations
3-73.9 TRANSMITTER POWER ADJUSTMENTS The transmitter power is adjusted to a maximum of 10 watts in high power mode and 1watt in low power mode over the transceiver operating bandwith at the factory. Iftransmitter RF power re-adjustment is required, perform as follows:1. Select the band that you wish to adjust on the band select switch.2. Connect an RF through-line wattmeter to the appropriate antenna connector. Set theoperating frequency to 156.000 MHz for VHF or 457.000 MHz for UHF and key thetransmitter.3. In low power mode, set the low power adjustment potentiometer on the left side ofthe chassis to produce 1.0 watt of RF output power (See Figure 3-3).4. In high power mode, set high power adjustment potentiometer on the left side of thechassis to produce 9.5 watts of RF output power.5. Verify that the RF output power is between 9 and 10 watts on 138.000 MHz and174.000 MHz for VHF or 403.000 MHz and 512.000 MHz for UHF.3.10 TRANSMITTER MICROPHONE LEVEL ADJUSTMENT1. Set the transceiver operating frequency to 156.000 MHz and connect an appropriatetest receiver to the RF output connector. Ensure that the output of the transceiver isterminated into a proper dummy load.2. Key the transmitter and input a -10 dBm (0.25 VRMS), 1 kHz audio signal into the microphone input.3. Adjust the microphone level potentiometer (Mic Level 1) through the access hole located on the right side of the chassis (see Figure 3-4) to produce a 2.7 kHz deviation.4. Verify that the deviation is at least 2.3 kHz on the following frequencies: 138.000MHz, 162.000 MHz and 174.000 MHz.5. For UHF, perform the same procedure using the Mic Level 2 pot on the left side of thetransceiver and use the following frequencies: 403.000 MHz, 457.000 MHz and512.000 MHz.
3-8FIGURE 3-4 External Adjustment Access Holes
3-93.11 SQUELCH ADJUSTMENTThe squelch circuit is designed to open or close depending upon the noise content and notthe strength of the received signal. Therefore high squelch settings are not necessary norpossible. The squelch on both the VHF and UHF receivers is factory set to open atapproximately 22 dB SINAD, while the guard receiver is set to open at 25 dB SINAD. Therange of adjustability is approximately 3 to 27 dB SINAD. This adjustment can be made oraltered to suit local conditions as follows:1. Set the receiver to 157.000 MHz for VHF or 457.000 MHz for UHF. Connect a signalgenerator to the antenna input of the desired band.2. Set the signal generator to produce a ±3 kHz deviation with a 1 kHz tone on 157.000MHz or 457.000 MHz. Increase the signal generator RF level from 0 uV until thesquelch indicator LED is on. Verify the squelch opens at the desired level.3. If not, re-adjust receiver squelch potentiometer through the access hole located on thebottom or side of the transceiver chassis (see Figure 3-4). 3.12 TRANSMITTER DEVIATION ADJUSTMENTVHF:1. Remove the bottom cover of the transceiver.2. Set the VHF operating frequency to 157.000 MHz and connect an appropriate testreceiver to the RF output connector. Ensure that the output of the transceiver isterminated into a proper dummy load.3. Key the transmitter and input a +10 dBm (2.5 VRMS), 2.5 kHz audio signal into microphone input 1.4. Adjust the wideband deviation limit potentimeter, R30 on the VHF Rx/Tx module (seeFigure 3-5) to produce a ±4.25 kHz deviation. Select narrow band mode on the VHFband and adjust the narrowband deviation limit potentimeter, R76 on the VHF Rx/Txmodule to produce a ±2.15 kHz deviation.5. Verify that the deviation does not exceed ±5 kHz for wideband and ±2.5 kHz for narrowband on 138.000 MHz, and 174.000 MHz. Re-adjust R30 or R76 as required,if the deviation exceeds ±5 kHz or ±2.5 kHz, respectively.6. Replace the bottom cover.UHF:1. Remove the top cover of the transceiver.2. Unplug the white coax from the guard receiver and remove the front panel.3. Remove the guard receiver tray.4. Replace the front panel and select the UHF band.5. Set the UHF operating frequency to 457.000 MHz and connect an appropriate testreceiver to the RF output connector. Ensure that the output of the transceiver isterminated into a proper dummy load.
3-106. Key the transmitter and input a +10 dBm (2.5 VRMS), 2.5 kHz audio signal into microphone input 1 if in single mode or microphone input 2 if in dual mode.7. Adjust the wideband deviation limit potentimeter, R30 on the UHF Rx/Tx module (seeFigure 3-6) to produce a ±4.25 kHz deviation. Select narrow band mode on the UHFband and adjust the narrowband deviation limit potentimeter, R76 on the UHF Rx/Txmodule to produce a ±2.15 kHz deviation.8. Verify that the deviation does not exceed ±5 kHz for wideband and ±2.5 kHz for narrowband on 403.000 MHz, and 512.000 MHz. Re-adjust R30 or R76 as required,if the deviation exceeds ±5 kHz or ±2.5 kHz, respectively.9. Replace the bottom cover.VHF Receiver/Transmitter PCB ModuleNotes: R30 is for 25 kHz (wideband) Deviation AdjustmentR76 is for 12.5 kHz (narrowband) Deviaton AdjustmentFIGURE 3-5 Deviation Adjustment Potentiometer Location
3-11UHF Receiver/Transmitter PCB ModuleNotes: R11 is for 25 kHz (wideband) Deviation AdjustmentR102 is for 12.5 kHz (narrowband) Deviaton AdjustmentFIGURE 3-5 Deviation Adjustment Potentiometer Location
A-1APPENDIX TO “INSTALLATION INSTRUCTIONS”POST INSTALLATION EMI TESTPURPOSEThe purpose of this test is to identify any interference that the TFM-500 may cause with existingaircraft systems. TEST CONDITIONSThe TFM-500 transceiver should be installed and function tested. The antenna VSWR should bechecked. A forward/reverse power check with a in-line wattmeter should show no more than 10%reflected power. For the following tests, insure that the power switch is in the high position.METHODOLOGYMost of the EMI tests can be accomplished on the ground. In some cases flight testing is requiredor is easier. If the aircraft is approved for IFR operations, then it is mandatory that interferencebetween the TFM-500 Airborne FM and the approach aids be checked in flight.The GPS should be operational and navigating with at least the minimum compliment of satellites. The VHF comm should be set to the frequencies indicated with the squelch open. VOR/DMEreceivers should be set to the frequencies indicated and selected for display If possible, set up aDME ramp test set on the frequencies indicated and adjust the output until the flags are out ofview. The transponder and encoder should be monitored with ramp test equipment. Set theoutput of the transponder test set to 3db above the output necessary to achieve 90% reply. Ifpossible set the ADF to a nearby navigation station.Modulate the TFM-500 transmitter on the indicated frequencies for at least 20 seconds.Observe the GPS for any degradation in satellite status or availability or flags. Listen for any noiseor detected audio signals on the VHF comm(s). Listen for any noise or detected audio signals onthe VOR/LOC receiver audio; look for any moment of flags or needles on the VOR/LOC/GSnavigation display(s). Observe the transponder for any loss of reply or spurious reply.List the power plant, fuel and other electric instruments in the chart provided and note anyanomalies that occur while transmitting. Assess the results.If the aircraft is equipped with an autopilot or a stability augmentation system, then test fly theaircraft and verify that operation of the TFM-500 transceiver does not have adverse effects onthese systems. After checking for gross effects at a safe altitude, fly an approach with each ofthe different navigation systems coupled to the autopilot (ILS, GPS ETC.) and look for anyanomalies.
A-2RESULTSIf the installed system passes all of the applicable EMI tests, then no further action is required. Ifinterference is observed then the interference must be assessed against the appropriate standardsof airworthiness for the system in question. For example it is permissible for a VFR certified GPSto lose navigation capability while the TFM-500 unit is transmitting, providing that it recoversproperly and promptly, but it is not permissible for an IFR Approach certified GPS to affected in thesame way. A complete discussion of all the standards of airworthiness to be applied in assessingEMI effects is beyond the scope of this document.PROCEDUREA. Operate the TFM-500 transmitter on the following frequency for at least 20 seconds. Observe the GPS for any degradation in satellite status or availability or flags.FREQUENCIES GPS #1 GPS #2TFM-500 PASS FAIL PASS FAIL143.180 MHZ143.1825 MHZ157.5000 MHZ157.5425 MHZ512 MHZNOTES:B. Determine if the image frequency for the VHF Comm falls within the range of the TFM-500.If so, select a set of frequencies that will cause the TFM-500 to be set as close as possible tothe image frequency. Any one of the many possible sets will suffice. Record those values inthe spaces provided in the following chart. Modulate the TFM-500 transmitter on thefollowing frequencies for at least 20 seconds. Listen for any noise or detected audio signalson the VHF comm.Example - Bendix/King KY 196A:The first IF frequency is 11.4 MHZ. The L.O. is above the received frequency (high sideinjection), therefore the image frequency is 22.8 MHZ above the selected frequency. Setthe KY 196A to 120.000 MHZ and the TFM-500 to 142.8000 MHZ.
A-3FREQUENCIES RESULTSVHF #1 TFM-500 PASS FAIL135.975 138.0000121.150 157.5000131.250 157.5000Image:FREQUENCIES RESULTSVHF #2 TFM-500 PASS FAIL135.975 138.0000121.150 157.5000131.250 157.5000Image:NOTES:
A-4C. Determine if the image frequency for the VOR/ILS Nav falls within the range of the TFM-500. If so, select two sets of frequencies that will cause the TFM-500 to be set as close aspossible to the image frequency. Chose one set in the localizer frequency range, and one inthe VOR frequency range. Record those values in the spaces provided in the followingchart. Modulate the TFM-500 transmitter on the following frequencies for at least 20seconds. Listen for any noise or detected audio signals on the receiver audio; look for anymoment of flags or needles on the navigation display.FREQUENCIES RESULTSVOR/ILS #1 TFM-500 PASS FAIL108.000 162.0000108.100 162.1500Image:Image:FREQUENCIES RESULTSVOR/ILS #2 TFM-500 PASS FAIL108.000 162.0000108.100 162.1500Image:Image:NOTES:
A-5D. Modulate the TFM-500 transmitter on the following frequencies for at least 20 seconds.Observe the Glideslope displays. Look for any movement of flags or needles on thenavigation display.FREQUENCIES RESULTSG/S #1 TFM-500 PASS FAIL334.7 (108.1) 167.3500FREQUENCIES RESULTSG/S #1 TFM-500 PASS FAIL334.7 (108.1) 167.3500NOTES:
A-6E. Operate the TFM-500 transmitter on the following frequency for at least 20 seconds. Observe the Transponder for any spurious replys or loss of reply to test set.FREQUENCIES TRANSPONDER #1 TRANSPONDER #2TFM-500 PASS FAIL PASS FAIL512 MHZNOTES:F. Modulate the TFM-500 transmitter on the following frequencies for at least 20 seconds. Observe the DME displays. Look for loss of distance information on the display.FREQUENCIES RESULTSDME 1 TFM-500 PASS FAIL978 (108.0) 4891020 (112.1) 510FREQUENCIES RESULTSDME 2 TFM-500 PASS FAIL978 (108.0) 4891020 (112.1) 510NOTES:
A-7NOTE:For the following tests, select a frequency at the top, middle and bottom of each band ofthe TFM-500 transceiver. 138 to 174 MHZ Band 403 to 512 MHZ BandFrequency #1Frequency #2Frequency #3G. At a safe altitude engage the autopilot or stability augmentation system. Modulate theTFM-500 transmitter on the above frequencies for at least 20 seconds. Observe any effecton the autopilot or stability augmentation system.Observations:H. Perform a coupled ILS approach to the aircraft's certified limits. Modulate the TFM-500 transmitter on the above frequencies for at least 20 seconds. Observe any effect on theautopilot. Repeat for second flight director/autopilot if equipped.Observations:
A-8I. List the power plant, fuel and other electric instruments in the chart provided and note any anomalies that occur whiletransmitting. Assess the results. STEP SYSTEM PASS FAIL NOTES1Com 1&2(UHF 403-512 MHz Band)2Transponder & Encoder (VHF 138-174 MHz Band)3ADF 1 & 24VG5Glideslope 1&2(UHF 403-512 MHz Band)6VOR/LOC 1&2(UHF 403-512 MHz Band)7Directional Gyro
STEP SYSTEM PASS FAIL NOTESA-98 Compass9Fuel Pressure10 Oil Temp11 Amps12 Bus Voltage13 Fuel %14 Nt15 TOT
STEP SYSTEM PASS FAIL NOTESA-1016 Torque %17 Annunciators18 Digital Clock19 Oil Pressure
STEP SYSTEM PASS FAIL NOTESA-11NOTES:

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