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HD-, SD-SDI and DVB-ASI Receiver with Integrated Adaptive Cable Equalizer

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Description

The GS1661A is a multi-rate SDI integrated Receiver which includes complete SMPTE processing, as per SMPTE 292M and SMPTE 259M-C. The SMPTE processing features can be bypassed to support signals with other coding schemes.

The GS1661A integrates Gennum's next-generation state-of-the-art adaptive cable equalizer technology, achieving unprecedented cable lengths and jitter tolerance. It features DC restoration to compensate for the DC content of SMPTE pathological signals.

The device features an Integrated Reclocker with an internal VCO and a wide Input Jitter Tolerance (IJT) of 0.7UI.

 

A serial digital loop through output is provided, which can be configured to output either reclocked or non-reclocked serial digital data. The Serial Digital Output can be connected to an external Cable Driver.

The device operates in one of four basic modes: SMPTE mode, DVB-ASI mode, Data-Through mode or Standby mode.

In SMPTE mode, the GS1661A performs SMPTE de-scrambling and NRZI to NRZ decoding and word alignment. Line-based CRC errors, line number errors, TRS errors and ancillary data check sum errors can all be detected. The GS1661A also provides ancillary data extraction. The entire ancillary data packet is extracted, and written to host-accessible registers. Other processing functions include H:V:F timing extraction, Luma and Chroma ancillary data indication, video standard detection, and SMPTE 352M packet detection and decoding. All of the processing features are optional, and may be enabled or disabled via the Host Interface.

In DVB-ASI mode, 8b/10b decoding is applied to the received data stream.

In Data-Through mode, all forms of SMPTE and DVB-ASI decoding are disabled, and the device can be used as a simple serial to parallel converter.

Features


  • Operation at 1.485Gb/s, 1.485/1.001Gb/s and 270Mb/s
  • Supports SMPTE 292M, SMPTE 259M-C and DVB-ASI
  • Integrated adaptive cable equalizer
  • Typical equalized length of Belden 1694A cable:
    • 250m at 1.485Gb/s
    • 480m at 270Mb/s
  • Integrated Reclocker with low phase noise, integrated VCO
  • Serial digital reclocked, or non-reclocked output
  • Ancillary data extraction
  • Parallel data bus selectable as either 20-bit or 10-bit
  • Comprehensive error detection and correction features
  • Output H, V, F or CEA 861 Timing Signals
  • 1.2V digital core power supply, 1.2V and 3.3V analog power supplies, and selectable 1.8V or 3.3V I/O power supply
  • GSPI Host Interface
  • -20ºC to +85ºC operating temperature range
  • Low power operation (typically 460mW)
  • Small 11mm x 11mm 100-ball BGA package
  • Pb-free and RoHS compliant

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