You mean like the X2Y tests? From: steve weir Sent: Sunday, September 07, 2014 9:06 PM To: leeritchey@xxxxxxxxxxxxx ; Alfred Alfred Cc: Leeyuyun ; si-list@xxxxxxxxxxxxx Subject: Re: [SI-LIST] Re: One stitching via or more vias is better for 25Gbps application??? Experiments are an important way to sanity check ideas and simulation results. There are lots of ways to put bad assumptions into a simulation model and get results that aren't real. But the flip side is that all experiments are limited in their ability to isolate the controlled variable. Even assuming that we have not made any mistakes in our set-up or measurements we still always need to be wary about generalizing the result of any given experiment or experiments. Best Regards, Steve On 9/7/2014 8:49 PM, leeritchey@xxxxxxxxxxxxx wrote: All of the things proposed don't seem to have any basis. I, on the other hand, have built test boards to find out. My findings are available in my classes and do not show such vias have any value. Sent from my HTC One⢠X, an AT&T 4G LTE smartphone ----- Reply message ----- From: "Alfred Alfred" mailto:alfred1520list@xxxxxxxxx To: mailto:leeritchey@xxxxxxxxxxxxx Cc: mailto:weirsi@xxxxxxxxxx, "Leeyuyun" mailto:lee.home.61@xxxxxxxxx, mailto:si-list@xxxxxxxxxxxxx mailto:si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Re: One stitching via or more vias is better for 25Gbps application??? Date: Sun, Sep 7, 2014 7:26 PM Dear List, I am very interested in seeing Lee's reply. Where can I find the ungarbled version? Thanks. 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