Very generally, the more you try to approach perfect synchronization, the more you get mired in diminishing returns. So it's pretty important to define exactly what degree of sync you really need. And why -- because if you can't answer the why, you don't actually know the what. Things like a timing module and careful use of Star Trigger signal paths can produce a rather extraordinary level of sync. But again, do you need it?
To help you find the appropriate bang-for-the-buck level of sync, please define the degree of sync you're trying to achieve and the consequence for your system or analysis of not achieving it. For example, suppose you were aiming for 5 nanosec skew and/or uncertainty but can only manage something like 25. How would that affect the thing you're trying to accomplish?
-Kevin P
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