Agilent Technologies 54657A Betriebsanweisung Seite 66

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Testing the eye opening of an eye-pattern signal
There are generally two tests that you want to perform on an eye-pattern
signal: an eye boundary test and an eye opening test. Since the eye
boundary can be easily tested by using the normal mask template testing, this
section mainly focuses on how to create the mask for testing the eye opening.
A fail region in the shape of a hexagon is usually used to test the eye opening.
An example of the shape of the mask is shown below.
Example of the definition of an eye-pattern testing mask
Figure 2 18
Operating the Measurement/Storage Module
Testing the eye opening of an eye-pattern signal
2–50
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