Hi, I am trying to simulate a topology. it consists of driver --> 0 ohm resistor --> MS line (length varied from 1000 mils to 10000 mils) ---> DDR2 dq 533 io(receiver). I am just simulating to findout how much can be the maximum length, before signal degrades badly. As i am increasing the length, i am seeing more degradation at the Driver than at the receiver. there is degradation at the receiver , but it is OK. I have uploaded 3 files 1000mils,4800mils and 10000mils @ 10000mils there is delay between input and output but still output quality and input quality are good compared to 4800 mils case. why is this? 10000mils case should have more degradation http://s3.postimg.org/q6wi1e283/ddr2_io_0000_dq_533_MS3_1000.png http://s2.postimg.org/4qw22kazt/ddr2_io_0000_dq_533_MS3_4800.png http://s27.postimg.org/o988g61zn/ddr2_io_0000_dq_533_MS3_10000.png ------------------------------------------------------------------ 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