Dear Experts I have done the address simulation for DDR2. When I give a stimulus using 200MHz oscillator waveform with 50% duty cycle, I get a good waveform. If I give a stimulus using PRBS pattern, I get a waveform with more ringing. Is it because of the topology error or ibis model? I checked with another ibis model also. But the observations are same. I am using HyperLynx 8.2.1 Please assist me to correct the waveform. -- Best Regards, Balamanikandan.K ------------------------------------------------------------------ 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 forum is accessible at: http://tech.groups.yahoo.com/group/si-list 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