For differential signals you need to do four port measurements. The poor man's solution is to use baluns. This adds error sources that need to be corrected and is limited to the linear range of the baluns. Steve. Arun kumar P N wrote: > Hi all, > > > I had gone through the details about return loss measurement and relation > between VSWR(Voltage standing wave ratio) & reflection coefficient in > Google. > > > > Return loss = -20log (Vr/Vt) > > Where, > > Vr- Amplitude of reflected wave > > Vt- Amplitude of Transmitted wave > > > > ñ magnitude of à > > ñ = | à | . > > > > Relation between VSWR(Voltage standing wave ratio) and reflection > coefficient. > > VSWR = (1 + ñ)/(1 - ñ) > > > > Will this equations applicable for differential signals?, if I am going to > measure Signal P with respect to Signal N in the differential pair. > > > > If you would have any alternate solution to measure return loss of > differential signal, please suggest me. > > > > Thanks & Regards, > > > > Arun Kumar P N > > > > > > > > > ------------------------------------------------------------------ > 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 > or at our remote archives: > http://groups.yahoo.com/group/si-list/messages > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > > > -- Steve Weir Teraspeed Consulting Group LLC 121 North River Drive Narragansett, RI 02882 California office (866) 675-4630 Business (707) 780-1951 Fax Main office (401) 284-1827 Business (401) 284-1840 Fax Oregon office (503) 430-1065 Business (503) 430-1285 Fax http://www.teraspeed.com This e-mail contains proprietary and confidential intellectual property of Teraspeed Consulting Group LLC ------------------------------------------------------------------------------------------------------ Teraspeed(R) 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 technical documents are available at: http://www.si-list.net List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu