HELI-CODER™ 4 TRANSMITTER Operation Manual Doc. No. 6051452100 Rev.
Broadcast Microwave Services, Inc. | www.bms-inc.com Corporate Headquarters 12367 Crosthwaite Circle | Poway, CA 92064 US Phone: +1 800-669-9667 (US) | +1 (858) 391-3050 | Fax: +1 (858) 391-3049 BMS European Office Schwalbacherstr. 12 | 65321 Heidenrod-Kemel GERMANY Phone: +49-6124-7239-00 | Fax: +49-6124-7239-29 2012 Broadcast Microwave Services. All rights reserved. This document and the information contained in it is the property of Broadcast Microwaves Services, Inc.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C Document Revision History DRAFT November 2011 Preliminary Release April 2012 Preliminary Update May 2012 Initial Release June 2012 Rev - Add Additional Figures and Software Installation Section. December 2012 Rev A Amend DO-160 compliance table July 2013 Rev B Amend for references to encryption options December 2013 Rev C Amend FCC & Channel Bandwidth June 2014 Rev C1 Conventions Used in This Manual 1.
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Contents 1 INTRODUCTION ..............................................................................................................................................1 2 SAFETY ............................................................................................................................................................2 3 PRODUCT DEFINITION ...................................................................................................................................4 3.
List of Figures Figure 1. Heli-Coder 4 Transmitter ............................................................................................................................4 Figure 2 HC4 Front Panel Labels ..............................................................................................................................3 Figure 3 Transmitter mounting bracket .....................................................................................................................
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 1 INTRODUCTION This document provides instructions for installation, operation and maintenance of the Heli-Coder 4 (HC4) COFDM Transmitter controlled by a DLC50 Downlink Control Panel. BMS offers a wide selection of airborne products to meet the video and data requirements of today’s real world applications.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 2 SAFETY WARNING- RF Hazard: Non-Ionizing RF Emission Operators of this equipment should be familiar with basic RF equipment operation and safety concepts. Users must consider many unique factors to maintain RF safety. We offer the following guidelines with the recommendation that each individual and organization establish an RF Safety and Awareness program based on their combination of hardware and usage environment.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C Use the formula from OET65 to determine the minimum recommended distance according to your individual usage circumstances. Your organization should develop an understanding of its unique RF usage and create a plan to train personnel regarding recommended exposure limits according to the FCC and EU recommendations. General Safety Rules; a) Do not operate the transmitter or power amplifier with covers removed.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 3 PRODUCT DEFINITION 2 1 9 3 10 4 16 11 5 12 6 13 7 15 8 14 14 Figure 1. Heli-Coder 4 Transmitter Table 2. Product connector descriptions in Figure 1 1 GPS Antenna Input 13 USB 2.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 3.1 Product Specifications Frequency 6425-6525 MHz Channel Bandwidth 6/7/8 MHz RF Output Power 5W/10 W switchable Modulation COFDM 2k QPSK, 16/64 QAM FEC 1/2, 2/3, 3/4, 5/6, 7/8 Guard 1/4, 1/8, 1/16, 1/32 Other modulation available; consult factory Video Encoding H.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 4 CONNECTORS AND PINOUTS Figure 2 HC4 Front Panel Labels Table 3.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C Table 4. Connector pin outs GPS ANTENNA INPUT TNC CONN (FEMALE) 50 OHM HC4 Provides variable DC bias or none. SIGNAL SHIELDING GND GPS J1 610006040, TNC(f), 50 ohm 3-pin SOURIAU (m) HC 4 A 28VDC B GND C N/C Power Input J2 USB 2.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C RF OUTPUT NCONN(FEMALE) 50 OHM HC4 UP TO 10W RF OUT COFDM SIGNAL SHIELDING GND RF OUTPUTJ5 Audio J6 AUDIO HC4 1 AUDIO 1 L GND 2 AUDIO 1 L+ 3 AUDIO 1 L- 4 AUDIO 1 R GND 5 AUDIO 1 R+ 6 AUDIO 1 R- 7-12 N.C.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 5 INSTALLATION Installation should only be performed by an FAA Certified A/P or Avionics Technician. The HC4 and associated equipment should be installed in compliance with FAA regulations and accepted industry practices. Other than allowing adequate air circulation above and below the transmitter, there are no set standards for placement of the HC4 equipment.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 5.2 Fasteners Installation of the HC4 is unique to every aircraft. It is left to the installer to provide the properly certified fasteners for the application. 5.3 Mounting the Transmitter The HC4 transmitter should be mounted in aircraft or other craft using the BMS-supplied mounting bracket (BMS P/N 4414414000). The transmitter/bracket assembly must have adequate space above and below the unit to allow free air flow.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C Figure 5 HC4 Outline Drawing Broadcast Microwave Services, Inc.
1.79" (4.55 cm) 1.85" (4.71 cm) Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 0.98" (2.5 cm) M6 Threaded Hole (4 plcs) 9.09" (23.1 cm) 11.18" (28.4 cm) 3.94" (10.0 cm) 5.12" (13 cm) Figure 6 CT-A-MP HC4 Mounting Plate - Dimensioned Drawing Broadcast Microwave Services, Inc.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 5.4 Wiring Connections and Signal Interfaces Reference Figure 12 Typical airborne installation diagram (without TAA-101 Antenna Actuator)” and Figure 13 Wire Hook-Up Diagram for HC4 System” shown later in this document. Also reference section 16 of this manual titled “CONNECTION AND WIRING DIAGRAMS” during installation for detail related to a typical installation.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C A switchable (on/off) and adjustable (0-10VDC) DC voltage bias is supplied on the center pin of the connector to power the amplifier in the GPS antenna. The DC bias voltage is adjustable during the HC4 set-up operation. 5.4.9 Data Wayside Input J4 is a multi-pin connector for interfacing data to be transmitted with the video transport stream. The data wayside interface is RS-232 from between 1.2 to 115 kb/s. 5.4.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 6 6.1 TRANSMITTER OPERATION Operating the Transmitter with the DLC50 Control Panel The HC4 is designed for standard operation via a BMS DLC50 Control Panel. After wiring the transmitter according to the wiring diagram shown in the wiring and connection section the transmitter may be turned on via the power switch (PWR) located on the front face of the DLC50 Control Panel.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 6.2 DLC50 Menu Structure* Figure 9 DLC50 Commands * For full DLC50 operation see BMS document 6051439500 "DLC50 Operating Manual" Broadcast Microwave Services, Inc.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C Figure 10 DLC50 Outline Broadcast Microwave Services, Inc.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 7 7.1 BMS Geo-Point™ System Geo-Point System Description The Geo-Point System provides a method for ground personnel to instantly know the range and direction to the center point of live video they are viewing.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 8 SOFTWARE INSTALLATION The DLC50 and HC4 both come completely loaded with the software required to operate the unit. However field installation of software can easily be accomplished by the user in order to Update, Upgrade, or even reinstall the system software. The process to install software on either the DLC50 or the HC4 involves loading a file via the USB port on each device from a USB mass storage device.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 9 ACCESSORIES Item CT-A-MP Mounting Plate HC4-CONN-KIT DLC50 TAA-101 Description Part Number Mounting plate for transmitter 4414414000 Kit; Mating Connectors for HC4 Includes all PTO type connectors required for full HC4 installation. Does not include USB, BNC, or N-Type connectors (all commonly available). Aviation control panel.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 11 REGULATORY 11.1 Electromagnetic Compliance CE marked in accordance with EU Low Voltage and EMC Directives EN55022 EN55024 11.2 FCC The HC4 is an intentional radiator and is authorized by the Federal Communications Commission (FCC) to comply with the following parts of CFR 47 (grant pending); Part 74 Part 90 11.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 12 PREVENTIVE MAINTENANCE In order to ensure system longevity it is highly recommended that the following preventive maintenance procedures be done at the appropriate time. 12.1 Maintenance Schedule Procedure Inspect Mounting Hardware Inspect Wiring (connection, chafing) Inspect control and RF cables Inspect TAA-101 Antenna Actuator 12.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C Figure 11 Product Label Defective components under BMS warranty will be repaired/replaced promptly at the discretion of BMS. Items no longer under warranty will require a PO before repairs can proceed. NOTE: All goods returned for service require an RMA #. Any goods received without an RMA# may not be processed in a timely manner. Please contact BMS for an RMA#. 13.1 Customer Service Broadcast Microwave Services, Inc.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 14 GLOSSARY AES ASI: Asynchronous Serial Interface. Advanced Encryption System. Optional encryption system available for signal privacy Frequency Modulated (FM) method of sending information with radio waves. An older, dependable method of transmission. (See Digital Transmission) The mechanism which deploys or retracts the antenna radio operation or for landing and take-off.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C KLV Multipath NMEA 0183 NTSC Omni-Directional Antenna PAL phase-alternating line RF: Radio Frequency SDI: Serial Digital Interface Stand-by Key Length Value. A method of encoding data into video streams. Defined in standard SMPTE 336M-2007 The radio wave propagation phenomenon that results in the transmitted signals ft. reaching the receiving antenna by two or more paths.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 15 CONNECTION AND WIRING DIAGRAMS This section contains system and hook-up wiring diagrams. Broadcast Microwave Services, Inc.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C Figure 12 Typical airborne installation diagram (without TAA-101 Antenna Actuator) Broadcast Microwave Services, Inc.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C Figure 13 Wire Hook-Up Diagram for HC4 System (without TAA-101 Antenna Actuator) Broadcast Microwave Services, Inc.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C Figure 14 Typical airborne installation diagram (including TAA-101 Antenna Actuator) Broadcast Microwave Services, Inc.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C Figure 15 Wire Hook-Up Diagram for HC4 System (including TAA-101 Antenna Actuator) Broadcast Microwave Services, Inc.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C 16 COFDM Characteristics The main COFDM modulation parameters are: Number of sub-carriers (about 2000 for DVB-T) Guard interval (GI) duration between COFDM symbols Constellation scheme used for individual sub-carrier modulation Data redundancy code rate used for error correction The transmission robustness depends on constellation and code rate. The following table gives the useful transmission bit rate for each COFDM mode.
Heli-Coder 4 Transmitter Operation Manual | Doc. No. 6051452100 Rev. C The following table summarizes the results of the 4 possible guard interval values: Guard Interval Ratio 1/32 1/16 1/8 1/4 Guard Interval Duration (us) 7 14 28 56 Maximum echoes dispersion (km) 2.1 4.2 8.4 16.8 Maximum transmission distance (km) 2-6 4-12 8-24 16-48 Transmission distances can be increased when using directional antennas, but signal break-ups can still occur if long echoes enter the receiving antenna beam width.
