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Method and apparatus for reflective mixer testing of a cable modem

  • US 6,662,135 B1
  • Filed: 12/09/1998
  • Issued: 12/09/2003
  • Est. Priority Date: 12/09/1998
  • Status: Expired due to Fees
First Claim
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1. A method of performing an operability test on a communications system device, the method comprising the steps of:

  • providing a set of output test data;

    generating an output signal with the communications system device in response to the set of output test data;

    providing the output signal as an input signal to a reflective mixer;

    generating a reflected signal with the reflective mixer in response to the output signal;

    wherein the reflected signal comprises a set of information signals, each of which comprises a signal that is essentially the same as the output signal; and

    wherein each information signal is centered about frequency that is essentially equal to a harmonic of a sample frequency plus or minus the center frequency of the output signal; and

    providing the reflected signal as a second input signal to the communications system device.

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