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Automatic extraction of pulse-parametrics from multi-valued functions

  • US 5,343,405 A
  • Filed: 11/01/1991
  • Issued: 08/30/1994
  • Est. Priority Date: 03/23/1990
  • Status: Expired due to Term
First Claim
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1. A method of automatically characterizing a digital communication signal having a first state, a second state and transitions therebetween that produces an eye pattern on a waveform display device, the method comprising:

  • initializing a data array, defined in terms of a time axis and an amplitude axis, having a plurality of elements such that each element holds a common reference value;

    monitoring the digital communication signal during a sample period to obtain a time-amplitude representation of the digital communication signal during said sample period, said time-amplitude representation being in the form of a sequence of time-amplitude data points;

    addressing an element of said data array for each time-amplitude data point obtained using said data point as addressing data and incrementing the value in each addressed element;

    repeating the steps of monitoring and addressing for a plurality of sample periods; and

    summing the values held in selected elements of said data array along a selected one of the axes to characterize said digital communication signal.

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