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Introduction of stress into waveform, Pre- emphasis, Amplitude modulation – Teledyne LeCroy PeRT3 Eagle Systems User Manual

Page 18

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Version 1.6

PeRT

3

Eagle User Manual

14

LeCroy Corporation

The eye diagram of a typical "clean" bit stream generated by the analog front end is
shown below (for 5 Gb/sec):

Introduction of Stress into Waveform

The analog front end introduces stress (or distortion) into the waveform as desired by the
user. The stressed waveform can be used to explore the performance envelope of the
device under test, to determine the types and amounts of stress the device or design can
tolerate before desired bit error rates are exceeded.

Examples of the eye diagrams that result from introduction of certain types of stress are
shown below.

Pre-

Emphasis