VHF/UHF FM AIRBORNE TRANSCEIVER MODEL TFM-500 (P/N’s 971083-1,3 -VHF Guard Module) Installation and Operating Instructions Til Document No. 98RE243 Rev. N/C Issue 7 August 2002 Technisonic Industries Limited 240 Traders Boulevard, Mississauga, Ontario L4Z 1W7 Tel:(905)890-2113 Fax:(905)890-5338 www.til.
CAUTION This unit contains static sensitive devices. Wear a grounded wrist strap and/or conductive gloves when handling printed circuit boards. NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
Summary of Transceiver: DO-160C Environmental Testing for Technisonic Model TFM-500, VHF and UHF Conditions Section Description of Conducted Tests Temperature and Altitude 4.0 Equipment tested to categories B2 and D1. Vibration 8.0 Equipment is tested without shock mounts 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.
TABLE OF CONTENTS Title Paragraph SECTION 1 1.1 1.2 1.3 1.4 1.5 SECTION 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 SECTION 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.7.1 3.7.2 3.7.3 3.7.4 3.7.5 3.7.6 3.7.7 3.7.8 3.7.9 3.8 3.9 3.10 3.11 3.12 3.13 Page GENERAL DESCRIPTION Introduction . . . . . . . Description . . . . . . . Purpose of Equipment Model Variation . . . . Technical Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LIST OF TABLES Table No. 3-1 Title Page 9-pin D and 15-Pin D Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 LIST OF ILLUSTRATIONS Figure No. 2-1 2-2 3-1 3-2 3-3 3-4 3-5 3-6 Title Operator's Switches and Controls . . . . . . . . . . . . PC Up/Download Cable - Wiring Diagram . . . . . . . Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . Wiring Connections . . . . . . . . . . . . . . . . . . . . . . Interal Enable/Disable Jumper Locations . . . . . . .
SECTION 1 GENERAL DESCRIPTION 1.1 INTRODUCTION This publication provides operating and installation information on the TFM-500 Transceiver. manufactured by Technisonic Industries Limited. The unit offers an extended frequency range with selectable channel spacing and is intended for use (in the U.S.) only by government agencies or contractors thereto, who have obtained licensing for operation in the 138-150 MHz portion of the band.
1.5 TECHNICAL CHARACTERISTICS Specification Characteristic GENERAL Model Designation: TFM-500 Frequency Range: 138 to 174 and 403 to 512 MHz Tuning Increments: 2.5 kHz Operating Mode: F3E simplex or semi-duplex Channel Spacing: 25 or 12.5 kHz Physical Dimensions (including heatsink): Weight: Approx. 8.0" X 3.0" X 5.75" Approx. 5.1 Lbs (2.3 Kg) Mounting: Panel Mount via Dzus fastners Operating Temperature Range: -40EC to +60EC Power Requirement: Voltage: Current: 28.
1.5 TECHNICAL CHARACTERISTICS (continued) VHF RECEIVER Sensitivity at 12 dB SINAD Better than 0.35 µV Adjacent Channel Selectivity -75 dB (25 kHz) -70 dB (12.5 kHz) Spurious Attenuation -90 dB Third Order Intermodulation -70 dB Image Attenuation -80 dB FM Acceptance ± 6 kHz Hum and Noise Better than 45 dB Audio Distortion less than 5% Antenna Conducted Emission less than -70 dBm UHF RECEIVER Sensitivity at 12 dB SINAD Better than 0.
VHF and UHF TRANSMITTER RF Power Output 1 watt or 10 watts Output Impedance 50 ohms Maximum Deviation (In narrowband mode) ±5 kHz (25 kHz mode) ±2.5 kHz(12.5kHz mode) Spurious Attenuation -90 dB below carrier level Frequency Stability ± 2.5 ppm Microphone Circuit Carbon or equivalent Sidetone Output 0.5W (max) into 600S Harmonic Attenuation -65 dB below carrier level FM Hum And Noise -40 dB Audio Input 50 mV at 2.5 kHz into 200 S input circuit for ±3.5kHz deviation, adjst.
SECTION 2 OPERATING INSTRUCTIONS 2.1 FEATURES The 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 single unit. 2. The unit can be set up as a crossband repeater, linking a VHF and UHF frequency in both directions. 3. 200 memory positions per band which can each be programmed with a transmit and receive frequency with 25 or 12.
g) SIDETONE - The TX audio circuit becomes active allowing you to adjust the sidetone level with the VHF volume knob. When thedesired level is reached, press ENTER and this level will be set for both VHF and UHF bands. The factory setting is 23. Note: You must set the side tone every time you go through the configuration menu since the position of the knob is taken as the new level regardless of whether or not you made an adjustment.
2.2 OPERATING INSTRUCTIONS (See Figure 2-1) 1. Switch power on by turning the main volume clockwise. Depending how the radio is configured, either the last programmed or last displayed frequencies will appear on the screen. 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.
2. 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 flashing curser 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 kHz step, the nearest valid frequency will be automatically selected. 5. The curser will return to the second digit.
Selective memory scanning allows the user to select which of the 200 memory channels are to be scanned or locked out when the scan function is invoked. To use this feature, follow the PROGRAMMING INSTRUCTIONS found in paragraph 2.3. Once the screen displays SCAN or LOCKOUT, use the 1,2,3,4,5 or M.DN keys to toggle to the desired condition. The MDN button acts as a clear while pressing one or more of the above numbers adds the memory to the corresponding scan list or lists.
direct communications. ie/ If you are transmitting on 152.000 MHz and receiving 152.555 MHz, select VHF on the band select switch and press FUNC then UP to transmit on 152.555 MHz. To return to the split pair condition, you must recall the memory channel again. This is quickly 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 change frequency, etc.
2. 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 02 03 04 05 67.0 71.9 74.4 77.0 79.7 26 27 28 29 30 162.2 167.9 173.8 179.9 186.
017* 023 025 026 031 051 053* 054 065 071 116 122* 125 131 132 156 162 165 172 174 243 244 245 246* 251 266* 271 274* 306 311 346 351 356* 364 365 431 432 445 446* 452* 466 503 506 516 523* 612 624 627 631 632 721 731 732 734 743 032 036* 043 047 050* 072 073 074 114 115 134 143 145* 152 155 205 212* 223 225* 226 252* 255* 261 263 265 315 325* 331 332* 343 371 411 412 413 423 454* 455* 462* 464 465 526* 532 546 565 606 654 662 664 703 712 754 * indicates GE Digital Coded Squelch (DCS)
Using the MultiTDP Program: With the program running on your computer, a full MultiTDP instruction manual can be loaded by selecting Documentation in PDF format under the Help menu. Otherwise, to get started, pull down the File menu and select TFM-500. The program defaults to serial port com1 but can be set to com2, 3 or 4 under the Com Port menu. The program is now ready to use. You may want to upload data from the radio and edit channels or start a new data file.
SECTION 3 3.1 GENERAL INSTALLATION INSTRUCTIONS This section contains information and instructions for the correct installation of the TFM500, VHF/FM Transceiver. Make certain that the correct frequencies are preprogrammed in accordance with the equipment user's valid FCC operator's license, prior to installation. 3.2 EQUIPMENT PACKING LOG Unpack the equipment and check for any damage that may have occured during transit.
FIGURE 3-1 Outline Drawing for Model TFM-500 Transceiver 3-2
3.
FIGURE 3-2 Wiring connections for the TFM-500 Transceiver 3-4
3.7 WIRING INSTRUCTIONS Figure 3-2 shows all required connections and recommended wire sizes for the TFM-500 Transceiver. If problems with the correct operation of the UHF/FM Transmit function of a TFM-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 not open a repeater when using a CTCSS transmit tone.
3.7.9 Data Input Data communications equipment requiring direct access to the modulator and discriminator an be connected via pins 2 and 11. Data cannot be transmitted in CANADA unless equipment is approved for use with the TFM-500 by the communications regulatory authority. 3.8 INTERNAL PROGRAMMING AND GUARD ENABLE/DISABLE JUMPER The programming and direct frequency entry modes can be disabled by removing the internal enable/disable jumper strap from pins 1 and 2 of J10.
3.9 TRANSMITTER POWER ADJUSTMENTS The transmitter power is adjusted to a maximum of 10 watts in high power mode and 1 watt in low power mode over the transceiver operating bandwith at the factory. If transmitter RF power re-adjustment is required, perform as follows: 3.10 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 the operating frequency to 156.000 MHz for VHF or 457.
FIGURE 3-4 External Adjustment Access Holes 3-8
3.11 SQUELCH ADJUSTMENT The squelch circuit is designed to open or close depending upon the noise content and not the strength of the received signal. Therefore high squelch settings are not necessary nor possible. The squelch on both the VHF and UHF receivers is factory set to open at approximately 22 dB SINAD, while the guard receiver is set to open at 25 dB SINAD. The range of adjustability is approximately 3 to 27 dB SINAD. This adjustment can be made or altered to suit local conditions as follows: 3.
6. 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 (see Figure 3-6) to produce a ±4.25 kHz deviation. Select narrow band mode on the UHF band and adjust the narrowband deviation limit potentimeter, R76 on the UHF Rx/Tx module to produce a ±2.15 kHz deviation. 8.
UHF Receiver/Transmitter PCB Module Notes: R11 is for 25 kHz (wideband) Deviation Adjustment R102 is for 12.
APPENDIX TO “INSTALLATION INSTRUCTIONS” POST INSTALLATION EMI TEST PURPOSE The purpose of this test is to identify any interference that the TFM-500 may cause with existing aircraft systems. TEST CONDITIONS The TFM-500 transceiver should be installed and function tested. The antenna VSWR should be checked. 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.
RESULTS If the installed system passes all of the applicable EMI tests, then no further action is required. If interference is observed then the interference must be assessed against the appropriate standards of airworthiness for the system in question.
RESULTS FREQUENCIES VHF #1 TFM-500 135.975 138.0000 121.150 157.5000 131.250 157.5000 PASS FAIL Image: FREQUENCIES VHF #2 RESULTS TFM-500 135.975 138.0000 121.150 157.5000 131.250 157.
C. Determine if the image frequency for the VOR/ILS Nav falls within the range of the TFM500. If so, select two sets of frequencies that will cause the TFM-500 to be set as close as possible to the image frequency. Chose one set in the localizer frequency range, and one in the VOR frequency range. Record those values in the spaces provided in the following chart. Modulate the TFM-500 transmitter on the following frequencies for at least 20 seconds.
D. 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 the navigation display. FREQUENCIES G/S #1 334.7 (108.1) RESULTS TFM-500 334.7 (108.1) FAIL 167.3500 FREQUENCIES G/S #1 PASS RESULTS TFM-500 167.
E. 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 TFM-500 TRANSPONDER #1 FAIL PASS TRANSPONDER #2 PASS FAIL 512 MHZ NOTES: 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. RESULTS FREQUENCIES DME 1 TFM-500 978 (108.0) 489 1020 (112.
NOTE: For the following tests, select a frequency at the top, middle and bottom of each band of the TFM-500 transceiver. 138 to 174 MHZ Band 403 to 512 MHZ Band Frequency #1 Frequency #2 Frequency #3 G. At a safe altitude engage the autopilot or stability augmentation system. Modulate the TFM-500 transmitter on the above frequencies for at least 20 seconds. Observe any effect on the autopilot or stability augmentation system. Observations: H.
I. List the power plant, fuel and other electric instruments in the chart provided and note any anomalies that occur while transmitting. Assess the results.
STEP 8 9 SYSTEM PASS Compass Fuel Pressure 10 Oil Temp 11 Amps 12 Bus Voltage 13 Fuel % 14 Nt 15 TOT A-9 FAIL NOTES
STEP SYSTEM 16 Torque % 17 Annunciators 18 Digital Clock 19 Oil Pressure PASS A-10 FAIL NOTES
STEP SYSTEM PASS NOTES: A-11 FAIL NOTES
