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Max Parallel Constraint

1evere11

Does anyone have a good description of how the 4 field pairs relate to a specific case of parallelism?  The documented and described value of "1000:6:2000:7:4000:8:6000:10" does not do much to help me fully understand how the pairs are used to measure parallelism. 

"Example: “1000:6:2000:7:4000:8:6000:10” implies
that two traces which run parallel between 4 to 6 inches
must be at least 8 mils apart."

Does anyone know if this rule understands the concept of a bus where parallelism does not apply (like as with differential pairs)?

I am trying to identify a set of constraints that result in minimal crosstalk such that a full electrical simulation environment does not need to be implemented during physical layout design. 

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