Pulse or digital communications – Testing
Reexamination Certificate
2005-02-24
2008-08-12
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Testing
C375S348000, C702S108000
Reexamination Certificate
active
07411999
ABSTRACT:
Measurements for an eye diagram of signal of interest are placed in a data structure that is examined to locate an eye opening of interest. The eye opening of interest is normalized into figure of merit units related to the operational voltage and timing requirements of the data receiver for that signal. The locations within the normalized eye opening may be taken as center locations for trial symmetric shapes that start out small and are enlarged until they first include locations not part of the normalized eye opening. The center of a largest such shape is mapped back into the units of the original eye diagram as optimum sampling parameters for data analysis equipment that uses the receiver to sample the signal once per unit interval to discover logical value. An alternative is to repeatedly remove the ‘outer layer’ of the normalized eye opening until only one location remains.
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Agilent Technologie,s Inc.
Liu Shuwang
Neff Michael R
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