Tektronix TDSUSB2, Руководство пользователя

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Measurement Algorithms
JK) differential data transition. They are calculated for all the consecutive jitters
as
:
and so on till the last Cross-Over.
Eye Diagram
The Eye Diagram checks whether the USB signal is aligned with its
corresponding eye diagram. It represents the whole signal by splicing it into a
number of waveforms of unit interval (each waveform is of one bit time interval)
scaled and represented on the eye masks.
Eye Violation
An eye violation occurs when an USB signal crosses an eye mask. The results of
the eye violation are PASS if the waveform does not violate the eye masks. The
result is FAIL if the waveform violates the Eye Masks. The result is
CONDITIONAL PASS if the waveform violates the eye mask, but is within the
waiver mask.
By default, the application displays the waiver mask if the result is either
CONDITIONAL PASS or FAIL. If you select the option "Always show the
waiver mask in the eye diagram" in File> Preferences menu, the waiver mask is
displayed irrespective of the result.
TDSUSB2 Universal Serial Bus Measurement Package 195