VHF/FM AIRBORNE TRANSCEIVER MODEL TFM-138B (s/n’s 1500 and up with F14 Software) Installation and Operating Instructions Til Document No. 97RE221 Rev. A Issue 1 SEPTEMBER 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 DO-160C Environmental Testing for Technisonic Model TFM-138B, VHF Transceiver 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 Z. 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.
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 3.14 TABLE OF CONTENTS Title Page GENERAL DESCRIPTION Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 3 INSTALLATION INSTRUCTIONS - APPENDIX Post Installation EMI Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 LIST OF TABLES Table No. 3-1 Title Page 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 Title Page Operator's Switches and Controls - TFM-138B . . . . . . . . . . . . . . . . . . . .
TFM-138B SOFTWARE CHANGE NOTE This document covers operation of the Technisonic TFM-138B, s/n 1500 and onwards which have been delivered from the factory with version F14 software. For TFM-138B’s with s/n 1499 or less, TiL Document 95RE177 should be referred to. This document does not cover the operation of older version TFM-138B’s with s/n 1499 or less.
SECTION 1 GENERAL DESCRIPTION 1.1 INTRODUCTION This publication provides operating and installation information on the TFM-138B (with version F14 software), Transceiver manufactured by Technisonic Industries Limited. The version F14 software is factory installed in TFM-138B’s with s/n F1500 and onwards. The unit offers an extended frequency range with selectable channel spacing and is intended for use (in the U.S.
1.5 TECHNICAL CHARACTERISTICS Specification GENERAL Model Designation: TFM-138B Frequency Range: 138.000 to 174.000 MHz Tuning Increments: 2.5 kHz Operating Mode: F3E simplex or semi-duplex Channel Spacing: 25 or 12.5 kHz Physical Dimensions (including heatsink): Approx. 8.0" X 3.0" X 5.75" Weight: Approx. 3.1 Lbs (1.4 Kg) Mounting: Panel Mount via Dzus fastners Operating Temperature Range: -45EC to +70EC Characteristic Power Requirement: Voltage: Current: 28.0 Vdc, ± 15% Receive - 0.
1.5 TECHNICAL CHARACTERISTICS (continued) MAIN RECEIVER Sensitivity at 12 dB SINAD Better than 0.35 µV Adjacent Channel Selectivity -70 dB (25 or 12.
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. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 120 memory positions which can each be programmed with a transmit and receive frequency with 25 or 12.5 kHz channel spacing, Tx/Rx CTCSS tones or DPL codes and a 9-character alphanumeric title. 2 guard channels which can each be programmed with a Rx frequency with 25 or 12.
2.1 (NEW) FEATURES - F14 Software (continued) 2. Fast Download - PC download is now much faster. 3. PC Up/Download - It is recommended to purchase the PIB-100 programming box complete with Windows based programming software. However, as an alternative, it is possible to use the older DOS software supplied with the radio if you have an older 486 or early Pentium PC running DOS to program the radio. See PC download instructions for more details. 4. Fast Scan - Scanning speed has increased.
FIGURE 2-1 Operator's Switches and Controls - TFM-138B 2-3
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 frequency will appear on the screen. The transceiver is now in normal operating mode. 2. Adjust the audio level by adjusting the main and guard volume knobs. 3. Pressing the squelch defeat button will open both receivers to confirm they work. 4. Read the display.
2.3 PROGRAMMING INSTRUCTIONS To program one of the 120 memory channels in the TFM-138B: 1. Press the FUNC key. The display will show the function prompt. 2. Press the PROG key. The display will show the current receive frequency with a flashing curser on the second digit (The first digit is always a one <1>). 3. 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. 4.
2.4 PRIORITY SCANNING, SELECTIVE MEMORY CHANNEL SCANNING AND SCAN LISTS Instead of breaking up the 120 channels into blocks for scanning, the TFM-138B (with F14 software) has 5 scan lists. Any of the 120 channels can be assigned to any one of more of these 5 scan lists. This means the channels do not have to be repeated for them to be in more than one block and that you are not limited to the number of channels that you can scan at once, since all 120 channels can be put into any scan list.
2.7 RECEIVE FREQUENCY SIMPLEX FUNCTION The 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 direct communications. ie/ If you are transmitting on 152.000 MHz and receiving 152.555 MHz, 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.
2.13 PROGRAMMING CTCSS TONES/DPL CODES CTCSS tones (PL tones) or Digital DPL codes can be assigned to each memory channel. The guard receiver squelch will operate only on carrier detection, but guard 1 and 2 transmit tones or codes can be programmed. To program a tone/code to a memory channel: 1. Use the M.UP and M.DN keys to select the memory channel that you want to assign a CTCSS tone or DPL code. 2. Press the FUNC key then the TONE key.
7. The display will now show "RX DPL:" and the current 3-digit DPL code. If no DPL code is required "000" should be entered. Please note that if a DPL code is to be programmed a CTCSS tone should not be enabled. 8. Use the keypad to enter the required octal 3-digit DPL (Digital Coded Squelch or DCS) code.
2.14.1 Windows Program Requirements: 1. PC compatible computer running Windows 95/98/NT/2000/ME. CD ROM drive and an available serial port. 2. Bench power supply of 28 volts DC. 3. PIB-100 Programming Interface Box (p/n 001108-1) - use cables that are provided with the PIB-100 programming interface box. Do not use cable p/n 943165-4 which is shown in Figure 2-2 and is for use with the DOS program only. 2.14.2 Windows Program Installation: 1. Insert the CD into the drive. 2.
2.14.5 Helpful Hints: When uploading or downloading, a message box will appear asking you to press FUNC and then 7 on the radio. Press these keys before clicking the OK button in the message box. 2.14.6 DOS Program Requirements: 1. PC compatible computer with: C 200 MHz or less C 486 or early Pentium one processor C Printer port (LPT1) C CD drive - If not, you can copy the software on another computer to a floppy disk. C Colour monitor is preferred as some of the text is colour coded. 2.
2.14.10 Helpful Hints: * Be sure to never plug in the radio while the power supply is on or damage may occur to your printer port. C You can only use LPT1 as the printer port. Make sure it is enabled in the BIOS. C The program works best on older, slower computers but has worked on some new PCs running DOS. A good way to try this out is to make a DOS bootable floppy with the software on it running the software from the A: drive.
SECTION 3 INSTALLATION INSTRUCTIONS 3.1 GENERAL This section contains information and instructions for the correct installation of the TFM-138B, 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 occurred during transit.
FIGURE 3-1 Outline Drawing for Model TFM-138B Transceiver 3-2
3.6 INSTALLATION - PIN LOCATIONS AND CONNECTIONS (continued) TFM-138B Transceiver 15-Pin D Connections Pin # Description 1 600 Ohm Output 2 Data Output 3 Panel Lighting (28VDC or 5VAC) 4 Memory UP/PC Download Input 5 Memory Down/PC Download Input 6 Mic Signal Input 7 Main Power +28VDC 8 Main Ground 9 4 ohm Speaker Output 10 4 ohm/600 ohm Output Ground 11 Data Input 12 PC Download Input 13 PTT (Ground Keying) 14 Main Power +28VDC 15 Main Ground TABLE 3-1 3.
3.7.4 Front Panel Back Lighting Front panel back lighting connection should be made on pin 3 of the transceiver. The opposite 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 the transceiver configuration control label. 3.7.5 Audio Outputs (600 ohms and 4 0hms) The audio output from pin 9 can be used to drive a 4 ohm speaker up to 2.5 watts. Audio output from pin 1 is 600 ohms, 0.
Microprocessor Control Unit (MCU) PCB Module Notes: R23 is High Power Adjustment R24 is Low Power Adjustment J15 Jumper between pins 3 and 4 for Entry Enable Remove for Entry Disable FIGURE 3-3 Internal Enable/Disable Jumper and Transmit High/Low Power Adjust Locations 3-6
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 readjustment is required, perform as follows: 1. Remove bottom cover as described in the previous paragraph (3.8). Access to the two adjustment potentiometers on the Microprocessor Control Unit (MCU) PCB Module is provided by two access holes located at the back of the chassis tray. 2.
FIGURE 3-4 Microphone and Sidetone Level, Main and Guard Squelch Adjustment Access Holes 3-8
3.12 MAIN AND GUARD SQUELCH ADJUSTMENT The squelch on both the main and guard receivers is factory set to open at approximately 1.0 microvolts. This adjustment can be made or altered to suit local conditions as follows: 1. Set the main receiver of the transceiver to 156.000 MHz. Connect a signal generator to the the antenna input of the transceiver. 2. Set the signal generator to produce a ±3 kHz deviation with a 1 kHz tone on 156.000 MHz. Set the signal generator RF level to 1.0 uV .
3. Replace the bottom cover of the transceiver and secure with the seven (7) screws removed in step 1. Main Receiver/Transmitter PCB Module Notes: R30 is for 5.0 KHz (wideband) Deviation Adjustment R76 is for 2.
APPENDIX TO “INSTALLATION INSTRUCTIONS” POST INSTALLATION EMI TEST PURPOSE The purpose of this test is to identify any interference that the TFM-138, TFM-138A or TFM-138B may cause with existing aircraft systems. For simplicity all TFM-138 model variations will be referred as TFM-138 series transceivers in this document. TEST CONDITIONS The TFM-138 series transceiver should be installed and function tested. The antenna VSWR should be checked.
PROCEDURE A. Operate the TFM-138 series transmitter on the following frequencies for at least 20 seconds. Observe the GPS for any degradation in satellite status or availability or flags. FREQUENCIES TFM 138 GPS #1 PASS GPS #2 FAIL 143.180 MHZ 143.1825 MHZ 157.5000 MHZ 157.
B. Determine if the image frequency for the VHF Comm falls within the range of the TFM-138 series unit. If so, select a set of frequencies that will cause the TFM-138 series unit to be set as close as possible to the image frequency. Any one of the many possible sets will suffice. Record those values in the spaces provided in the following chart. Modulate the TFM-138 series transmitter on the following frequencies for at least 20 seconds. Listen for any noise or detected audio signals on the VHF comm.
C. Determine if the image frequency for the VOR/ILS Nav falls within the range of the TFM-138 series unit. If so, select a two sets of frequencies that will cause the TFM-138 series transceiver 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-138 series transmitter on the following frequencies for at least 20 seconds.
D. Modulate the TFM-138 series transmitter on the following frequencies for at least 20 seconds. Look for any moment of flags or needles on the navigation display. FREQUENCIES G/S #1 334.7 (108.1) RESULTS TFM-138 series 334.7 (108.1) FAIL 167.3500 FREQUENCIES G/S #1 PASS RESULTS TFM-138 series 167.
NOTE: For the following tests, select a frequency at the top, middle and bottom of the range of the TFM 138 series transceiver. Frequency #1 ______________ Frequency #2 ______________ Frequency #3 ______________ E. At a safe altitude engage the autopilot or stability augmentation system. Modulate the TFM- 138 series transmitter on the above frequencies for at least 20 seconds. Observe any effect on the autopilot or stability augmentation system. Observations: F.
G. 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 SYSTEM 10 Bus Voltage 11 Fuel % 12 Ng 13 TOT 14 Torque % 15 Annunciators 16 Digital Clock PASS A-8 FAIL NOTES
STEP SYSTEM PASS A-9 FAIL NOTES
STEP SYSTEM PASS A-10 FAIL NOTES
STEP SYSTEM PASS NOTES: A-11 FAIL NOTES
