Which is better loosely coupled or tightly coupled differential pairs? Will the location of the top and bottom planes in a stack up really affect the differential impedance? How do I achieve a 100 Ohm differential impedance in stripline? What about 85 Ohms? Why do I care? What is it about the design that will affect the losses in the line? How much is too much? And what can I do about it? If you struggle with any of these questions and want to learn about how the physical design of differential pairs affects the performance of the interconnect this webinar is for you. This recorded webinar was originally broadcast live on Sept 16, 2009.