TM600-8VSB ATSC BROADCAST MODULATOR
TABLE OF CONTENTS 1.0 Safeguards ........................................................................................................ 3 General Safeguards ................................................................................................ 3 Safety and First Aid ................................................................................................. 4 2.0 Warranty............................................................................................................ 5 3.
1.0 SAFEGUARDS General Safeguards This section is written as a general guide to keep all 5 fingers on your hand and is intended for those having previous knowledge and experience with these kinds of equipment. It is not intended to contain a complete statement of all safety precautions, which should be observed by personnel using this or other electronic equipment. DOCUMENTATION - Read, retain and follow instructions before operating the equipment.
Safety and First Aid Personnel engaged in the installation, operation, maintenance, or servicing of electronic equipment are exposed to the hazard of high voltage. It is imperative that all safety regulations and precautions are consistently observed. Knowledge of first aid procedures is recommended. The following information is presented as a reference only. DANGEROUS VOLTAGES AND CURRENTS MAY BE PRESENT IN THE EQUIPMENT EVEN THOUGH THE POWER IS OFF. REFER SERVICING TO QUALIFIED PERSONNEL.
2.0 WARRANTY Our legalese is straightforward. It is simply designed to give you peace of mind and helps you resist the temptation to have your electronics friend try to repair your Technalogix product. Technalogix Ltd. products have been completely tested and found to meet specifications and be in proper operating condition. They are warranted to be free from defects in materials and workmanship for a period of one year from the date of shipment.
To claim your rights under this warranty: • Contact Technalogix and describe the problem in as much detail as possible. See troubleshooting section in this manual. If a solution cannot be found at this time, it may be determined that the unit will have to be returned to Technalogix for repair, once a Return Materials Authorization (RMA) number is provided. Please look under our web site (www.technalogix.ca) for the RMA form (Service) and fill it out. Either fax it to us or email to us.
Terms & Conditions of Sale Sales by Technalogix Ltd (“Seller”) are made only on the terms which are contained in this Terms and Conditions of Sale Policy. Seller hereby gives notice of its objection to any different or additional terms and conditions. All sales are expressly conditional upon Buyers’ assent to the terms and conditions set forth below. These terms and conditions may be modified or supplemented only by a written document sighed by the authorized representative of Seller.
invoice, subject to credit approval. If credit is not established or maintained, terms shall be net cash on or prior to the Delivery Date. Seller reserves the right, at its sole discretion at any time to revoke any credit previously extended. Past due accounts shall be charged two percent (2%) per month, or the highest rate permitted by Alberta law, whichever is less, and will be added to the outstanding balance.
Returns The return of Products without a written authorization by Seller will not be accepted. Returns are accepted only with a valid Return Material Authorization (RMA) number for items to be returned. To receive authorization for Product return, please call customer service. There is a standard 25% restocking cost assessed on most returns. All returned products must be unused, and in original condition. No refund or credit shall be given for damaged products.
3.0 OVERVIEW General Description The TM600-8VSB is a cost effective 8-VSB professional modulator especially designed for digital TV broadcasting applications. The TM600-8VSB accepts a MPEG-2 Transport Stream, processes it, and modulates it onto a UHF channel. In order to bring the highest performance in the smallest package, TM600-8VSB integrates up-to-date FPGA technology as well as sophisticated digital signal processing algorithms, especially for the modulation and the output filtering processes.
Specifications 1 Performances measured with EFA Equipment (Rohde & Schwarz) 8-VSB Agile Modulator Issue 1.01 April 28, 2008 www.technalogix.
Input / Output Interfaces 8-VSB Agile Modulator Issue 1.01 April 28, 2008 www.technalogix.
Physical Characteristics Electrical Specifications 8-VSB Agile Modulator Issue 1.01 April 28, 2008 www.technalogix.
Principle of operation / Block Diagram The input of 8-VSB modulator is a MPEG-2 Transport Stream (TS) based on MPEG-2 at a fixed bit rate of 19.39265846Mbs. The TS has 188 byte packet structure. The 8-VSB spectrum is contained in a 6 MHz channel.
ASI1 ASI2 SMPTE1 Input Management I(nt) TS ATSC Framing Q(nt) I(nt) Non Linear Pre-correction Q(nt) SMPTE2 I(nt) Q(nt) IQ Digital Modulator DAC IF RF Monitor Bandpass Filter Upconverter RF OUT Low Noise Synthesizer 10MHz In Clock Management Power Supply Control and Monitoring RS232 12Vdc In 10MHz Out Data Input Interfaces The module accepts a MPEG2-Transport Stream dedicated to ATSC transmission as specified in SMPTE-310 and ATSC Standard A/53. It also supports an ASI-320 stream format.
• • • The ATSC transmission scheme relies on a very stable and accurate data stream clock. The SMPTE-310 data clock will be at the exact standardized clock frequency. At the same time, the modulator will synchronize with this input data stream to be able to recover the same clock. In the case of using an external clock reference (10 MHz), the global clock synchronization might be plesiochronous (i.e. a small clock deviance between the multiplexer clock and the modulator reference clock).
• Using the software, the user will define their linear pre-correction curve. Then the points will be used to compute complex coefficients to be sent to the module. It needs 64 complex coefficients and these coefficients are used in the module to configure the filter. - Non Linear pre-correction. The modulator can perform non linear pre-correction over a 20 MHz bandwidth. The modulator can also perform amplitude and phase correction over the full spectrum of the signal.
4.0 INSTALLATION This section contains installation recommendations, unpacking, inspection, and installation instructions for the Technalogix TM600-8VSB Modulator. Carefully read all material in this section prior to installation. Also, read and review the operating procedures later in this section. Building Recommendations The quality of the building is of great importance if you are to expect long life and continued performance from the modulator.
Heating and Cooling Requirements The environment’s temperature will contribute greatly to the length of the modulator’s life. Technalogix recommends that the building’s filtered air intake must have capacity for all air-flow in the building plus an additional 20%. Keep the intake below the roofline to avoid intake of solar heated air. Please ensure that the intake and exhaust areas are on the same side of the building to avoid pressure differentials during windy conditions.
Electrical Service Recommendations Technalogix recommends that a qualified, licensed local electrician be consulted for the required electrical service. We suggest local electricians because: • The personnel knows the local codes • The personnel can be on site readily • You are apt to get better overall support if you give what business you can to local suppliers Technalogix recommends that proper AC line conditioning and surge suppression be provided on the primary AC input to the power amplifier.
Antenna and Tower Recommendations Your preliminary engineering workgroup should establish your antenna and tower requirements, both for receiving and transmitting antennas. Construction of sturdy, high quality antenna/tower systems will pay off in terms of coverage of your service area, the overall quality and saleability of your radiated signal, and reduced maintenance expenses. Technalogix provides complete turnkey antenna systems if needed.
Shelter Security The FCC requires that the transmitter be secure from entry or control by unauthorized persons, and that any hazardous voltages or other dangers (including most tower bases) be protected by locks or fences as necessary to protect personnel and prevent unauthorized tampering or operation. Security of the building further implies that it be secure from wildlife. Use sturdy construction materials, including sheet metal if necessary.
Unpacking and Inspection Check the outside of the container. Carefully open the container and remove the modulator. Retain all packing material that can be reassembled in the event that the equipment must be returned to the factory. EXERCISE CARE IN HANDLING EQUIPMENT DURING INSPECTION TO PREVENT DAMAGE DUE TO ROUGH OR CARELESS HANDLING. Visually inspect the enclosure of the modulator for damage that may have occurred during shipment.
Location and Function of Controls and Connectors The following illustrations depict the location of the installation connectors when installing the modulator portion of the system. FRONT BACK Front Panel: Test Point- Provides a sample of the RF output level. RF test point is only a relative indicator of the actual RF output level and may vary. All RF operating measurements should be made at the RF output of the unit. RS232 - Textual low level command interface.
Modulator Operation 1. Terminate modulator into a 50 ohm load before applying power. 2. Connect the power cord of the Technalogix modulator to a proper electrical source as indicated on the back of the unit. 3. Connect the MPEG-2 encoded input to the jack on the rear panel (either ASI-320 or SMPTE-310). 4. Connect the RS232 on the front panel to a computer and run the control software.
THANK YOU FOR CHOOSING TECHNALOGIX Ltd. 8-VSB Agile Modulator Issue 1.01 April 28, 2008 www.technalogix.
