Patent ID: 9444588
Filing Date: 2016-09-13
CPC Classification: H04L

Claim Text:
1. A method for evaluating operation of a receiver, the receiver including: an analog front end for receiving a serial input signal and generating a pre-processed signal; a plurality of samplers connected in parallel to the analog front end for sampling the pre-processed signal, the plurality of samplers comprising a plurality of utility samplers, a plurality of data samplers and a plurality of timing samplers; an unrolled decision feedback equalizer (UDFE) connected to outputs of the plurality of data samplers; and a serial input parallel out (SIPO) block connected to an output of the UDFE and outputs of the plurality of utility samplers and the plurality of timing samplers for generating a parallel output signal, the method comprising: adjusting settings of the plurality of utility samplers to sweep across a range of interest, where a number of utility samplers swept across the range of interest is equal to a number of the plurality of data samplers; at each of a plurality of points spanning the range of interest, comparing a selected output of one of the plurality of utility samplers at that point to an output of one of the plurality of data samplers to detect an error event; and, accumulating the error events for the plurality of points spanning the range of interest.