How to test the eye diagram in a fiber optic bit error rate tester

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This paper describes what an eye diagram is, how it is constructed, and common methods of triggering used to generate one. This instrument class measures samples of the input signal to form an eye diagram that can be used for analysis of the signal's noise, jitter, and eye mask compliance. The resulting image takes on a distinct eye-like shape, from which engineers can discern important signal characteristics.

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When a bit is a zero, does it see it as a zero and not make any mistakes? The tests are based on fundamental parts of the eye diagram. Take the shape of the eye diagram. Ideally, the...

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