Their recommendation puzzles me as well. I believe it comes from not understanding how Ethernet front-end is designed. Ghery is actually the first person in ALL my discussions on this subject who points out what I think is correct. I still do not think ISN/CDN is appropriate and I do not get why V-clamp and I-clamp method would only be alternative and why ISN would prevail in case of dispute, especially since using the clamps can only overtest and never undertest, although you can often experience higher ***apparent*** emission with ISN than with the clamps - which does not make sense unless something is wrong - and I believe it is. Neven
-------------- Original message -------------- From: [email protected] Hi Neven, I have talked to a manufacturer of the TLISNs and they recommended using a two balanced pair for 10/100 Ethernet and four balanced pair for Gigabit. The two balanced pair will accept 8 wires but only 4 of them go through the network while the others are passing straight through. It makes sense to me to use the 4 balanced pair for all Ethernet. Ghery pointed out that the TLISN is decided by how many wires the cable has and not the number of wires used. Why would they suggest a two balanced pair unit for 10/100 when all the Ethernet cables have 8 wires? Thanks, Tim Pierce _____ See what's free at AOL.com <http://www.aol.com/?ncid=AOLAOF00020000000503> . - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
