Active multichannel video processing hub for optimum transition from fiber to coax
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United States of America Patent
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-
Sep 25, 1990
Grant Date -
N/A
app pub date -
Apr 28, 1988
filing date -
Apr 28, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An active multichannel video processing hub which provides optinum transition from fiber to coaxial cable, provides optimum trading of bandwidth for signal to noise ratio. Fiber optic links have a very large bandwidth capability. Larger distances can be covered with fiber optic links without repeaters. This offers not only saving in maintenance, but has no radiation and offers bidirectional capabilities not easily achievable with coax-based trunks. Scrambled signals are transmitted over the fiber and converted to VSB-AM signals at the hub for transmission over the coaxial portion of the trunk. This keeps the bulky and complex headend scrambling equipment in one central location instead of spreading it over many hub locations. The inherent heterodyne processing capabilities of the hub permit it to link headends with different frequency plans. Also, the hub-based trunk does not obsolete existing equipment and method of operation.
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