****************** Virus Warning Message (on gemini2.ieee.org) Found virus TROJ_NAVIDAD.E in file Emanuel.exe The file is deleted.
If you have questions, contact virus-ad...@ieee.org *********************************************************
Hi! Robert: I'm very interested in the emperical equations that you have for twisted-pair. Do you mind sharing this with me ? Thanks in advance Perry Qu Robert Macy wrote: > Did you find out what you need? > > Somewhere around here I have the equations that closely approximate twisted > pair for 26 Awg and 28 Awg wire from DC to 10MHz. They were derived from > empirical modeling. You can make various approximations to simplify their > use. > > That includes impedance, loss per length vs frequency, etc. > > I don't think they take into account being close to conductors, like a > shield, or crosstalk between pairs, because that's another analysis, but > they're *extremely* useful for predicting attenuation versus frequency for > analyzing the expected performance one will get from DSL modems. > > - Robert - > > Robert A. Macy, PE m...@california.com > 408 286 3985 fx 408 297 9121 > AJM International Electronics Consultants > 619 North First St, San Jose, CA 95112 > > -----Original Message----- > From: William D'Orazio <dora...@cae.ca> > To: EMC Posting (E-mail) <emc-p...@majordomo.ieee.org> > Date: Thursday, January 11, 2001 7:20 AM > Subject: Zo > > > > >Does anybody know the characteristic impedance of a twisted pair? > >Thanks in advance, > > > > <<...OLE_Obj...>> > > > >William D'Orazio > >CAE Electronics Ltd. > >Electrical System Designer > > > >Phone: (514) 341-2000 (X4555) > >Fax: (514)340-5552 > >Email: dora...@cae.ca > >
****************** Virus Warning Message (on gemini2.ieee.org) Emanuel.exe is removed from here because it contains a virus. *********************************************************
