Equivalent time sampling system

Details Equivalent time sampling system Equivalent time sampling system

2008-07-22

2008-07-22

Nguyen, Tu T (Department: 2886)

Optics: measuring and testing

For optical fiber or waveguide inspection

Reexamination Certificate

active

07403274

ABSTRACT:
An equivalent time sampling system employs two clock frequency sources, phase locked, wherein an analog to digital converter sampling clock is derived from one source and a pulse generator clock is derived from the other. Choice of the clock frequencies determines minimum time step and the set of available time steps, and pulse repetition period determines the time step size, for equivalent time sampling. The system is suitably implemented in a time domain reflectometer, optical time domain reflectometry system, or other systems for obtaining time domain responses to a periodic stimulus of a system under test, with stimulus rate and the sampling intervals varying over a wide range.

REFERENCES:
patent: 6594004 (2003-07-01), Makita
patent: 7173443 (2007-02-01), Asami
patent: 2007/0066265 (2007-03-01), May

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