(PCB Insertion Loss) Bidirectional SET2DIL
Intel has released new application note describing new method on SET2DIL measurement. The new method is called "Bidirection SET2DIL" Its concept is to inject signal to two different port of SET2DIL trace, which can be thought of Bidirectional. One would get two samples and averaged its result to obtain SDD21. It compensates two things recently discovered. First, the assumption of "Symmetric differential trace" is not valid for every coupon. Second, it compensates for receiver disparities. This is going to improve the credibility of SET2DIL result including R^2, loss and deskew value.
Please find the purposed powerpoint file here - Bidirectional_SET2DIL_130530.pdf