Remove the "free" at the end of the link and then the link actually works. See Hour <yshour2001@yahoo .com> To Sent by: si-list@xxxxxxxxxxxxx, si-list-bounce@fr alfred1520list eelists.org <alfred1520list@xxxxxxxxx> cc 02/28/2011 04:38 Subject PM [SI-LIST] Re: FW: Re: Passive Probe Hi Alfred "the secret world of oscilloscope probes" http://esvc000124.wic048u.server-web.com/links/THE%20SECRET%20WORLD%20OF%20PROBES%20OCt09.pdffree --- On Tue, 1/3/11, alfred1520list <alfred1520list@xxxxxxxxx> wrote: From: alfred1520list <alfred1520list@xxxxxxxxx> Subject: [SI-LIST] Re: FW: Re: Passive Probe To: si-list@xxxxxxxxxxxxx Date: Tuesday, 1 March, 2011, 5:48 AM Thanks, Mark. And thanks, Orin, in the other response. "the secret world of oscilloscope probes" http://www.siliconchip.com.au/cms/A_111671/article.html $8.80 buy online and "tektronix oscilloscope probe circuits joe weber" http://www.slack.com/concepts.html http://www.slack.com/TE/TekConcepts/TekProbeCircuits.pdf Free. Thanks, Tek. Best Regards, Alfred Lee ----- Original Message ----- From: "Mark Freeman" <msf@xxxxxxxxxxx> To: "alfred1520list" <alfred1520list@xxxxxxxxx>; <si-list@xxxxxxxxxxxxx> Sent: Monday, February 28, 2011 10:06 AM Subject: RE: [SI-LIST] Re: FW: Re: Passive Probe To explore further, search the internet with terms: "the secret world of oscilloscope probes" A good overview. and "tektronix oscilloscope probe circuits joe weber" A classic from 1969. -Mark Freeman > -----Original Message----- > From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list- > bounce@xxxxxxxxxxxxx] On Behalf Of alfred1520list > Sent: Monday, February 28, 2011 9:50 AM > To: si-list@xxxxxxxxxxxxx > Subject: [SI-LIST] Re: FW: Re: Passive Probe > > Hi Orin, > > Very thought provoking for those not in the know. I sure > would appreciate a link or two so I could learn more. > > ----- Original Message ----- > From: "Orin Laney" <olaney@xxxxxxxxx> > Sent: Saturday, February 26, 2011 8:46 AM > > > On the other hand, a user with a test > > point that itself has a Z of a few ohms can intelligently use a > passive 10X > > probe well into VHF. Alas, few users understand the limitations of > their > > probes well enough to pull this off. > > How do you get a test point with a few ohms of Z? Typical > drivers might be in the teen, and with series termination in > the dozen of ohm. Then if you are in the middle or end (which > is really what you care about) of a trace the trace impedance > is around 50. Do you need a buffer? > > What are the limitations? In terms of bandwidth? Phase linearity? > What does one need to know to predict the fidelity of the measurement? > > > Even fewer think to deliberately design in suitable test points. > > What makes a suitable test points? > > > Again, I'm not requesting any details explanation here. I am > only looking for a paper or article that I can read and learn. > But if you have a short explanation that would be great. > > Thank you very much in advance. > > > Best Regards, > Alfred Lee > > www.mds.com > > ------------------------------------------------------------------ > 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 ------------------------------------------------------------------ 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