Martin Carefully. The answer is that anything you can do to capture the output of a pattern generator necessarily "colors" the result, which requires the following question to be asked: * do you want to capture the output of the generator, the cable, or the launch point into the PCB? Different non-trivial "things" have to be done depending on what you want to model in simulation, and how you care to treat Dj and Rj, since both, as seen by the system under test (SUT), depend on your interconnect to the SUT. LeCroy, Wild River Technologies, and Teraspeed Consulting covered some of this in our DesignCon 2011 paper "Developing Unified Methods of 3D Electromagnetic Extraction, System Level Channel Modeling, and Robust Jitter Decomposition in Crosstalk Stressed 10Gbpsec Serial Data Systems" best regards, Scott Scott McMorrow Teraspeed Consulting Group LLC 121 North River Drive Narragansett, RI 02882 (401) 284-1827 Business (401) 284-1840 Fax http://www.teraspeed.com Teraspeed® is the registered service mark of Teraspeed Consulting Group LLC On 6/17/2011 3:12 PM, Murphy, Martin wrote: > All, > > What is the best way to capture the actual output of a pattern > generator, in order to generate a realistic model for use with > simulation tools? The data rate is 25 Gb/s if that is relevant:) > > Martin P. Murphy > Senior Sales Engineer > > Tel: (408) 717-1126 > email: martin.murphy@xxxxxxxxxxx > > ------------------------------------------------------------------ > To unsubscribe from si-list: > si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > > or to administer your membership from a web page, go to: > //www.freelists.org/webpage/si-list > > For help: > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > > List technical documents are available at: > http://www.si-list.net > > List archives are viewable at: > //www.freelists.org/archives/si-list > > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.net List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu