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ATSC Master FD™


Full Duplex ATSC (SMPTE 310M) PCI 2.1 Interface with Accurate Clock

OVERVIEW
Atsc Master FD
 

The television industry is currently in the process of changing from analog to digital technology. MPEG-2 has been universally adopted as the main standard for video compression. Since MPEG-2 must be decoded at the same rate it was encoded at an information layer needs to be added to the MPEG in order to transmit it to consumers. Standards have been created by industry to provide for the methodology of packetizing MPEG-2 streams and adding tables via data packets to the video packets The ATSC standard has been approved by the USA Government as the standard to accommodate this need for terrestrial digital television. This product complies with the ATSC specifications and provides for the ability of computers to capture, process, and transmit ATSC compliant streams.

THE SMPTE 310M STANDARD

SMPTE 310M defines a method of digitally transmitting MPEG-2 Transport Streams at either 19.38 or 38.8 Mbps and is designed to be transmitted via 8VSB modulation to the home receiver. It is usually composed of a 12 Mbps High Definition ( 1080i) stream and a 6 Mbps Standard Definition stream ( 640i) . This is the standard that is usually used to feed most brands of Modulators that actually create the RF signals. Our device can be used to create Video Servers or test equipment that is compatible with the ATSC standard.

Clock Issues: The SMPTE 310M standard specifies a very accurate 2.5 ppm clock. The cabling for ATSC requires a 75 ohm Coaxial Cable with BNC connectors.

Standard Features

  • Both Transmitter & Receiver on the same half-sized PCI 2.1 card
  • High-Speed Asynchronous I/O interface using Link List DMA
  • External Transmit clock input (ECL) option for receiver
  • Highly stable local oscillator meets all ATSC accuracy specs.
  • Support for Win 2000/XP and Linux drivers.
    Clock input
  • Captures or plays SP or MP Transport Streams

Specifications
Input/Output Connectors 75-Ohm BNC Connector
Coaxial Cable Type 75-Ohm impedance usable up to 850 MHz
External Clock Input 75-Ohm DC Blocked ECL
Data Input/Output SMPTE 310 -1998 8VSB Transport Stream
Data Rate 19,392,658.46 bits/sec
Data Input Voltage 800 mV +/-10%Peak
Data Input Offset 0.0 V +/-0.5 V
Bus Interface PCI 2.1 compliant,5 V
Card Size (Short PCI) 6.9 x 3.9 in (175 x 99 mm)
Voltage Requirements +5 V
Operating Temperature 0° to 55°C
Operating Humidity To 90%,non-condensing
Clock Source Selection Software controlled
Software Support Win NT, 2000, Linux

 

Block Diagram

Applications

  • Transport of MPEG-II Transport Stream (TS) over long distances
  • Moving the MPEG-II TS to/from the PCI bus for processing
  • Interfacing to MPEG-II to PCI bus Encoder/Decoder boards
  • General studio equipment interfacing

Transport of MPEG-II Transport Stream (TS) over long distances Moving the MPEG-II TS to/from the PCI bus for processing Interfacing to MPEG-II to PCI bus Encoder/Decoder boards General studio equipment interfacing