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Using equalization coefficients of end devices in a cable television network to determine and diagnose impairments in upstream channels

  • US 8,526,485 B2
  • Filed: 09/23/2009
  • Issued: 09/03/2013
  • Est. Priority Date: 09/23/2009
  • Status: Active Grant
First Claim
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1. A system for identifying suspect cable network plant components causing an upstream impairment, the system comprising:

  • a data storage device configured to store an impairment threshold for at least one impairment contribution; and

    a testing module configured to perform a testing process, the testing module includingan equalization coefficient receiving module (ECRC) configured to receive equalization coefficients from a plurality of end devices; and

    an impairment level determination (ILD) module configured to determine whether an impairment exists for each of the end devices and to determine a type of impairment using the received equalization coefficients and the impairment threshold.

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