Hi, Gen2 spec says...minimum return loss should be -8db...and insertion loss can be 10 to 11 db...make sure ur gen 3 loss budget is close to gen2.. bala On Feb 9, 2013 11:05 PM, "Dan" <signal.integrity2@xxxxxxxxx> wrote: > HI Julia > is the spec you provded is for add in card? i am looking out for the spec > for add-in card and not mother board. > > -18db return loss seems ok. but can you tell me the limit for insertion > loss? i hope these numbers are without edge finger included. > > Regards > Dan. > > > On Fri, Feb 8, 2013 at 6:48 PM, zhuyuan Liu <julialiu.si@xxxxxxxxx> wrote: > > > Hi Dan, > > > > I have seen several presentation use > > > > *üMaximum calibration channel of 22dB loss at 4GHz (4.3.4.3.1 Calibration > > Channels)* > > > > *ü-18dB return loss compliance channel (4.3.4.1.2 Calibration Channel > > Characteristics)* > > > > I personally use it too. But sometimes even though your channel violate > > above IL and RL, the channel will still work. You'd better to use eye > > diagram to make sure. > > > > Julia > > > > On Feb 8, 2013, at 4:02 PM, Dan <signal.integrity2@xxxxxxxxx> wrote: > > > > HI Scott, > > but in the rev3 spec, insertion loss budget for 8GT/S channel is not > > mentioned. there are numbers only for 2.5GT/S only in the pdf? > > > > any idea what that would be 8GT/S? > > > > Thank You > > Dan > > > > > > On Fri, Feb 8, 2013 at 3:37 PM, Scott McMorrow <scott@xxxxxxxxxxxxx> > > wrote: > > > > Dan > > > > I suggest you obtain the spec from PCISig > > > > http://www.pcisig.com/specifications/pciexpress/base3/ > > > > On Fri, Feb 8, 2013 at 6:25 PM, Dan <signal.integrity2@xxxxxxxxx> wrote: > > > > HI ALL, > > I have a PCIE Gen3 board x8, where the Tx have -4db insertion loss & > -10db > > return loss at 4GHz. Is this loss number within spec. > > > > is the spec same for Rx also? > > > > Please help > > > > regards > > Dan > > > > > > ------------------------------------------------------------------ > > 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 > > > > > > > > > > > > -- > > > > Scott McMorrow > > Teraspeed Consulting Group LLC > > 16 Stormy Brook Road > > Falmouth, ME 04105 > > > > (401) 284-1827 Business > > > > http://www.teraspeed.com > > > > Teraspeed® is the registered service mark of > > Teraspeed Consulting Group LLC > > > > > > > > ------------------------------------------------------------------ > > 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 > > > > > > > > > > ------------------------------------------------------------------ > 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 > > > ------------------------------------------------------------------ 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