Method and apparatus for time vernier calibration

Details Method and apparatus for time vernier calibration Method and apparatus for time vernier calibration

2011-08-09

2011-08-09

Le, John H (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C702S079000, C702S117000, C714S704000

Reexamination Certificate

active

07996168

ABSTRACT:
Disclosed is a method and apparatus for calibrating a time vernier in an automatic test equipment (ATE) system, the method including generating a data signal and a reference signal whose periods differ by a small amount (dt), using precession of the data signal and reference signal to create accurate delay increments, and creating a trigger signal for Bit Error Rate Test (BERT) counting, the trigger signal having a select frequency such than an integer number (N) of triggers are generated with a precession period (TPREC). Upon occurrence of each trigger, a BERT is initiated for measuring data to determine strobe positions with respect to the data signal.

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