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Data transmission system

  • US 6,571,393 B1
  • Filed: 05/27/1998
  • Issued: 05/27/2003
  • Est. Priority Date: 05/27/1998
  • Status: Expired due to Term
First Claim
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1. A data transmission system comprising:

  • a server;

    a plurality of subscribers;

    a plurality of data lines from said server;

    connection means for connecting to said subscribers to said server, said subscribers being connected to said connection means by respective cables;

    pre-emphasis filter means provided in each said data line between said server and said connection means;

    means for transmitting a test signal along a channel from said server to a receiver at a said subscriber;

    means for returning said test signal from said receiver to said transmitting means; and

    means for calculating distortion properties of said channel from a delay in returning said test signal from said receiver to said transmitting means and for establishing required properties of said pre-emphasis filter means to compensate for said distortion properties.

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