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Method and apparatus for measuring communications link quality

  • US 20050032491A1
  • Filed: 08/07/2003
  • Published: 02/10/2005
  • Est. Priority Date: 08/07/2003
  • Status: Active Grant
First Claim
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1. A communications link receiver, comprising:

  • a data receiver for receiving a communications signal from a communications link;

    a first circuit for producing a high frequency jitter measurement output proportional to an amount of high frequency jitter of said communications signal, said high frequency jitter measurement output having a component that varies with an amount of low frequency jitter present in said communications signal;

    a second circuit for producing a low frequency jitter measurement output proportional to an amount of low frequency jitter of said communications signal; and

    a correction circuit coupled to said high frequency jitter measurement output and said low frequency jitter measurement output for correcting said high frequency jitter measurement output in conformity with said low frequency jitter measurement output to produce a corrected high frequency jitter measurement output.

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