Can I find total clock jitter by adding period jitter to long-term jitter?
No, “period jitter plus long-term jitter” is not a useful quantity. Neither is “period jitter plus input-to-output jitter.” In the best-case scenario, long-term jitter is made of the same components as period jitter. That is why the long-term jitter number fundamentally must be greater than the period jitter number.
