DCD peak to peak jitter

[raytroop]

SerDesSystemCProject/docs/modules/mux.md

Line 68 in bf0b573

- **Duty Cycle Distortion (DCD)**: Clock duty cycle deviation from 50% causes unequal adjacent UI widths. DCD-induced peak-to-peak jitter = `DJ_DCD = UI × |DCD% - 50%|`. For example, a 48% duty cycle (2% deviation) produces 0.32ps jitter at 16ps UI.

2UI instead of UI shall be in DCD-induced peak-to-peak jitter = DJ_DCD = 2UI × |DCD% - 50%|