VHF/FM DIGITAL AIRBORNE TRANSCEIVER MODEL TDFM-136A Installation Instructions TiL Document No. 09re404 Revision C Issue 1 JUNE 2009 Technisonic Industries Limited 240 Traders Boulevard, Mississauga, Ontario L4Z 1W7 Tel: (905) 890-2113 Fax: (905) 890-5338 www.til.
REVISIONS for 09re404 Sections 1 – 2 REV A B C D SECTION - PAGE - Table 1-1 - STC Approv. - Table 1-5 - FCC Compliance - FCC Compliance - Table 1-4 - 2.5 Antenna Installation. - Footer, all pages. 2.5 2-5 DESCRIPTION DATE Changed operating temp to –30 to +60 C. Change references of DO-160C to 160D. Change Temp & Alt to B4 and D1. Change Magnetic Effect to class Z. Add FCC RF Exposure Requirements warning. May 26/09 Change separation distance from 110cm to 1.0m.
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TECHNISONIC INDUSTRIES LIMITED www.til.ca ESD CAUTION This unit contains static sensitive devices. Wear a grounded wrist strap and/or conductive gloves when handling printed circuit boards. FCC COMPLIANCE INFORMATION This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation.
TECHNISONIC INDUSTRIES LIMITED www.til.ca STC APPROVAL NOTE Presently, no TSO standard exists for airborne FM transceivers.
TECHNISONIC INDUSTRIES LIMITED www.til.ca TABLE OF CONTENTS SECTION TITLE Table of Contents ............................................................................................................................. List of Figures ................................................................................................................................... List of Tables ................................................................................................................................
TECHNISONIC INDUSTRIES LIMITED www.til.ca LIST OF FIGURES FIGURE 2-1 2-2 2-3 2-4 TITLE Transceiver Mounted View of the 15-Pin Connector .......................................................... Outline Drawing for TDFM-136A Transceiver ..................................................................... Wiring Connections for TDFM-136A Transceiver ............................................................... Control points for the TDFM-136A MCU Board ..................................................
TECHNISONIC INDUSTRIES LIMITED www.til.ca SECTION 1 - GENERAL DESCRIPTION 1.1 INTRODUCTION This publication provides operating and installation information for the TDFM-136A, Digital Transceiver manufactured by Technisonic Industries Limited. The TDFM-136A is Project 25 (P25), Phase 1 compliant. The unit offers digital or conventional analog FM communications over an extended frequency range with selectable channel spacing and is intended for use (in the U.S.
TECHNISONIC INDUSTRIES LIMITED www.til.ca 1.4 MODEL VARIATION There are twelve variations of the Model TDFM-136A Transceiver.
TECHNISONIC INDUSTRIES LIMITED www.til.ca 1.5 TECHNICAL CHARACTERISTICS The tables below provide the technical characteristics for the Technisonic Industries Ltd. Model TDFM-136A. TABLE 1-1 TDFM-136A – General Characteristics Characteristic Specification Dimensions (including heat sink) Approx. 8.0" X 3.0" X 5.75" Weight Approx. 3.5 Lbs (1.6 Kg) Mounting Panel Mount via DZUS fasteners Power Requirement: Voltage Current Audio Output Power: Headset Speaker Output 28.0 VDC, ±15% Receive - 0.
TECHNISONIC INDUSTRIES LIMITED www.til.ca TABLE 1-2 TDFM-136A – Operational Characteristics Characteristic Specification Frequency Range: 136.000 to 174.000 MHz Operating Modes: Conventional analog: 12.5 / 25 kHz. P25 CAI: 12 KBPS FSK, 9.6 KBPS C4FM 25 kHz. or 12.
TECHNISONIC INDUSTRIES LIMITED www.til.ca TABLE 1-4 TDFM-136A – Transmitter Characteristics Characteristic RF Output Power: Low High Output Impedance 1W. 10W. 50 ohms Maximum Deviation: Wide (25 kHz) Narrow (12.5 kHz) Maximum Deviation – Narrow ± 5 kHz ± 2.5 kHz ± 2.5 kHz (12.5 kHz mode) Spurious Attenuation -90 dB below carrier level Frequency Stability ± 2.5 ppm Microphone Circuit Carbon or equivalent Sidetone Output 0.
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TECHNISONIC INDUSTRIES LIMITED www.til.ca SECTION 2 – INSTALLATION INSTRUCTIONS 2.1 GENERAL This section contains information and instructions for the correct installation of the TDFM-136A, VHF/FM Digital Transceiver. Make certain that the correct frequencies are pre-programmed in accordance with the equipment user's valid FCC operator's license, prior to installation. 2.2 EQUIPMENT PACKING LOG Unpack the equipment and check for any damage that may have occurred during transit.
TECHNISONIC INDUSTRIES LIMITED www.til.ca Table 2-1 provides the description of the pin connections for the transceiver.
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TECHNISONIC INDUSTRIES LIMITED www.til.ca 2.7 WIRING INSTRUCTIONS – 15-PIN D-CONNECTOR Figure 2-3 shows all required connections and recommended wire sizes for the TDFM-136A Transceiver operation in the airframe. 2.7.1 Main Power +28 VDC The main power +28VDC (± 15%) is connected to pins 7 and 14 of the 15-pin D-connector on the transceiver. Both pins should be connected. 2.7.2 Main Ground Ground connections for the transceiver are made on pins 8 and 15. Both pins should be connected. 2.7.
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TECHNISONIC INDUSTRIES LIMITED www.til.ca 2.8 TRANSMITTER SIDE TONE LEVEL ADJUSTMENT The side tone level is set at the factory; however, this level can be altered to suit local conditions as follows: 1. Set the transceiver operating frequency to 155.000 MHz and connect an appropriate test receiver to the RF output connector. Ensure that the output of the transceiver is terminated into a proper dummy load. 2. Key the transmitter and input a 1 kHz audio signal @ -10 dBm (0.25 VRMS) into the microphone input.
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TECHNISONIC INDUSTRIES LIMITED www.til.ca APPENDIX A – POST INSTALLATION EMI TEST INSTRUCTIONS” PURPOSE The purpose of these tests is to identify any interference that the TDFM-136A may cause with existing aircraft systems. TEST CONDITIONS The TDFM-136A transceiver should be installed and function tested. The antenna VSWR should be checked. A forward/reverse power check with an in-line wattmeter should show no more than 10% reflected power.
TECHNISONIC INDUSTRIES LIMITED www.til.ca PROCEDURE A. Operate the TDFM-136A transmitter on the following frequency for at least 20 seconds. Observe the GPS for any degradation in satellite status or availability or flags. FREQUENCIES TDFM-136A GPS #1 PASS GPS #2 FAIL PASS FAIL 143.1800 MHz 143.1825 MHz 157.5000 MHz 157.
TECHNISONIC INDUSTRIES LIMITED www.til.ca B. Determine if the image frequency for the VHF COMM falls within the range of the TDFM-136A. If so, select a set of frequencies that will cause the TDFM-136A 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 TDFM-136A transmitter on the following frequencies for at least 20 seconds.
TECHNISONIC INDUSTRIES LIMITED www.til.ca C. Determine if the image frequency for the VOR/ILS Nav falls within the range of the TDFM-136A. If so, select two sets of frequencies that will cause the TDFM-136A to be set a 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 TDFM-136A transmitter on the following frequencies for at least 20 seconds.
TECHNISONIC INDUSTRIES LIMITED www.til.ca D. Modulate the TDFM-136A transmitter on the following frequencies for at least 20 seconds. Observe the Glide Slope displays. Look for any movement of flags or needles on the Navigation display. FREQUENCIES Glide slope #1 334.7 (108.1) TDFM-136A PASS FAIL 167.3500 MHz FREQUENCIES Glide slope #2 334.7 (108.1) RESULTS TDFM-136A RESULTS PASS FAIL 167.
TECHNISONIC INDUSTRIES LIMITED www.til.ca For the following tests (E & F), select a frequency at the top, middle and bottom of the band of the TDFM-136A Transceiver. VHF Band (138 to 174 MHz) Frequency No. 1 Frequency No. 2 Frequency No. 3 E. At a safe altitude engage the autopilot or stability augmentation system. Modulate the TDFM136A on the above frequencies for at least 20 seconds. Observe any effect on the autopilot or stability augmentation system. Observations: F.
TECHNISONIC INDUSTRIES LIMITED www.til.ca 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.
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