Tried everything and I am staring to think what I am trying to do just will not work.
A diff pair set to 5/7/5 (5mil wire width with 7mil spacing)
One of the traces is 1008.42 mil long....the other is 1040.06
I set the DIFFP_PHASE_TOL to 5mils ( I think this means that both etch lengths have to be within 5 mils of each other, correct?)
When I try to tune using the DELAY TUNE (in single trace mode), the accordian gives a drc as soon as I try to increase it's length or amplitude. In dual trace mode, no drcs, but no adjustment to make both traces "equal in length" within 5mil.
So.....is it possible to tune this diff pair at 5 mil DIFFP_PHASE_TOL *and* containing a defined diff pair GAP of 5mil????
If not, then what would be a reasonable tolerence of the lengths?