{"id":1427,"date":"2013-06-28T11:11:05","date_gmt":"2013-06-28T18:11:05","guid":{"rendered":"https:\/\/blogs.mentor.com\/hyperblog\/?p=1427"},"modified":"2026-03-27T09:20:18","modified_gmt":"2026-03-27T13:20:18","slug":"correlating-simulation-and-measurement","status":"publish","type":"post","link":"https:\/\/blogs.sw.siemens.com\/electronic-systems-design\/2013\/06\/28\/correlating-simulation-and-measurement\/","title":{"rendered":"Correlating simulation and measurement"},"content":{"rendered":"<p>We go through great pains to ensure that our analysis tools give highly accurate answers in the most efficient manner possible.\u00a0 That requires accurate field solving &#8211; in both 2 dimensions and 3 dimensions, as appropriate &#8211; as well as accurate simulation.\u00a0 Accurate simulation includes simulation of S-parameters in the time domain, which requires appropriate handling of causality and passivity issues, proper concatenation of multiple S-parameters, and the avoidance of common pitfalls from brute-force methods like convolution (we use\u00a0complex pole-fitting\u00a0instead, which is accurate and efficient).\u00a0 It also means appropriately handling all determinsitic and random jitter sources by utlizing worst-case bit sequences to\u00a0accurately predict BER down to 10^-18 and beyond.\u00a0 All of this becomes crucial at multi-GBs SERDES speeds.\u00a0 An example of SERDES simulation\/measurement\u00a0correlation can be found in the following article: <a href=\"http:\/\/electronicdesign.com\/what-s-difference-between\/what-s-difference-between-simulation-and-measurement\" target=\"_blank\" rel=\"noopener\">http:\/\/electronicdesign.com\/what-s-difference-between\/what-s-difference-between-simulation-and-measurement<\/a><\/p>\n<p>It is important to make sure that all of your inputs into the simulation are accurate.\u00a0 That starts with something as simple as getting the board stackup and trace widths to match what is actually manufactured &#8211; take a look at the references at the end of the article above (or some of my previous blogs) for more info.\u00a0 For SERDES speeds specifically, that means making sure any models used, like SPICE and S-parameters, have the the appropriate bandwidth, and that all the pieces of the channel have been solved with the appropriate field solver.\u00a0 Even for PI, it is important to make sure that capacitor ESL is appropriately understood and the correct method of modeling ESL is used, as this can have a dramatic effect on the results of a PI analysis.<\/p>\n<p>If you take the time to make sure you are feeding HyperLynx the right information, it will give you the answers you seek about the true performance of your design.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>We go through great pains to ensure that our analysis tools give highly accurate answers in the most efficient manner&#8230;<\/p>\n","protected":false},"author":71672,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spanish_translation":"","french_translation":"","german_translation":"","italian_translation":"","polish_translation":"","japanese_translation":"","chinese_translation":"","footnotes":""},"categories":[13],"tags":[],"industry":[],"product":[],"coauthors":[],"class_list":["post-1427","post","type-post","status-publish","format-standard","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/blogs.sw.siemens.com\/electronic-systems-design\/wp-json\/wp\/v2\/posts\/1427","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.sw.siemens.com\/electronic-systems-design\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.sw.siemens.com\/electronic-systems-design\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/electronic-systems-design\/wp-json\/wp\/v2\/users\/71672"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/electronic-systems-design\/wp-json\/wp\/v2\/comments?post=1427"}],"version-history":[{"count":1,"href":"https:\/\/blogs.sw.siemens.com\/electronic-systems-design\/wp-json\/wp\/v2\/posts\/1427\/revisions"}],"predecessor-version":[{"id":10368,"href":"https:\/\/blogs.sw.siemens.com\/electronic-systems-design\/wp-json\/wp\/v2\/posts\/1427\/revisions\/10368"}],"wp:attachment":[{"href":"https:\/\/blogs.sw.siemens.com\/electronic-systems-design\/wp-json\/wp\/v2\/media?parent=1427"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/electronic-systems-design\/wp-json\/wp\/v2\/categories?post=1427"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/electronic-systems-design\/wp-json\/wp\/v2\/tags?post=1427"},{"taxonomy":"industry","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/electronic-systems-design\/wp-json\/wp\/v2\/industry?post=1427"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/electronic-systems-design\/wp-json\/wp\/v2\/product?post=1427"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/electronic-systems-design\/wp-json\/wp\/v2\/coauthors?post=1427"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}