Equations for twisted-pair (was Re: Zo)
** 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, PEm...@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. *
Equations for twisted-pair (was Re: Zo)
** 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, PEm...@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. *
