1.5 Technical Terms
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1
Outline
Eye Levels, Eye Widths
Eye Widths are the eye widths of the PAM4 waveform. They depend on
how the eyes are defined. Eye Levels are the levels to measure eye widths.
Figure 1.5-12 Eye Level and Eye Width of PAM4 Waveform
Eye Mask
The Eye Mask is the boundary of the eye pattern waveform time and
amplitude. The value and waveform are specified by the communications
standards.
Figure 1.5-13 Example of Eye Mask
Eye Level
Upper
Level 2
Level 1
Level 3
Level 0
Eye Width Middle
Eye Width Upper
Eye Width Lower
Eye Level
Middle
Eye Level
Lower
Minimum of 0 level
Maximum of 0 level
Minimum of 1 level
Maximum of 1 level
Maximum jitter
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