Agilent Technologies 71501D Manual do Utilizador descarregar pdf (Página 83)

3-3

Eye-Diagram Analyzer Reference

Performing Eye-Diagram Measurements

To perform the automatic eye-diagram measurements, use the Measure menu.

With the exception of extinction ratio, these measurements must be per-

formed in eye mode.

Automatic Measurements

The Measure menu’s top two softkeys automatically start measurements:

• EXTINCT RATIO

• MEASURE EYE

• Use the EXTINCT RATIO softkey to automatically compute the extinction ratio

in eye or eyeline modes. This measurement is a ratio of the most prevalent log-

ical one level divided by the logical zero level over one bit interval. When mak-

ing extinction ratio measurements in eyeline mode, the number of samples

should be increased from the default of 1000 to approximately 20000. This in-

sures that a number of traces are evaluated to compute the extinction ratio.

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Agilent Technologies 71501D Manual do Utilizador Página 83