Stress Calibration for Jitter >1UI

While measuring the amount of jitter present on a signal is relatively straight forward conceptually; when the levels of jitter are small, amounts above a bit period (1 unit interval or UI) can be more difficult. This has practical consequences for standards such as USB 3.0 where calibration at the test device of 2 UI at 500 kHz of sinusoidal jitter is required. This note describes use of patterns and triggering on a BERTScope to allow such calibration.