1.5 Technical Terms
1-31
1
Outline
Eye Skews
When PAM4 waveform and Sample Timing is Independent, Eye Skews
are phase differences between the average value of the center of each eye
(Eye Center) and the centers of Upper Eye, Middle Eye and Lower Eye.
Figure 1.5-15 PAM4 Eye Skews (When Sample Timing is Independent)
When Sample Timing is Track to Middle Eye Timing, the eye skew is 0.
Level 2
Level 1
Level 3
Level 0
Eye Skew Upper
Eye Skew Lower
Average position of three eyes
Upper Eye
Middle Eye
Lower Eye
Eye Skew Middle
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