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Data communication system with self-test facility

  • US 6,862,701 B2
  • Filed: 03/06/2001
  • Issued: 03/01/2005
  • Est. Priority Date: 03/06/2001
  • Status: Active Grant
First Claim
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1. A method for self-testing a data communication system that includes a presettable scrambler and a complementary presettable descrambler, the method comprising:

  • presetting the presettable scrambler to a preset state;

    scrambling a seed payload field using the presettable scrambler to generate fields of a test sequence;

    transmitting the fields of the test sequence and receiving corresponding received test sequence fields;

    descrambling the received test sequence fields using the presettable descrambler to generate respective recovered test sequence fields; and

    detecting differences between the recovered test sequence fields and the seed payload field as errors.

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