>>cut
ObContent: Has anyone noticed how different board vendors use different
calculations to get the same controlled impedance on the same board?
Some vendors will claim that it's impossible to meet impedance
requirements that other vendors can easily handle. Perhaps they are not
using the same materials, even though we specify FR4 and copper weight.
If you respond to this Content, please change the subject to something
more meaningful.
Regards,
-- Laurence
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