Hello, We have purchased CDN from Fischer Custom Communications.
Regards, Ken Hall Hewlett Packard -----Original Message----- From: david_ster...@ademco.com [mailto:david_ster...@ademco.com] Sent: Thursday, April 18, 2002 1:05 PM To: carpenti...@thmulti.com; emc-p...@majordomo.ieee.org Subject: RE: Suitable CDN for IEC61000-4-6 ethernet 10/100 Most people use the EM clamp. We test to EN50130-4 alarm system limits: 10V, pulsed and AM modulated. The test is trivial because of the inherent immunity of Ethernet; be sure you understand the EUT and AE port partitioning algorithms. Constructing a CDN that compliant to ANSI/IEEE 802.3/802.3u twisted pair transmission line definitions for 10BaseT and 100BaseTX is not trivial. When you play games with the transmission line the Ethernet/F-E link becomes 'cable-length sensitive', i.e. less S/N at certain cable lengths ... confounding the immunity test results. It is probably possible to design an Ethernet/F-E CDN, I would want correlation data before using it. EN55022:1998 RF-conducted emissions test methods for UTP Ethernet are controversial; I prefer to discuss them off-line. David Sterner ADEMCO, Syosset, NY -----Original Message----- From: Carpentier Kristiaan [mailto:carpenti...@thmulti.com] Sent: Thursday, April 18, 2002 2:05 PM To: emc-p...@majordomo.ieee.org Subject: Suitable CDN for IEC61000-4-6 ethernet 10/100 Hello group, IEC 61000-4-6 mentions a decision chart on the use of injection method: 1rst question of this chart: are suitable CDN's available? if YES: use CDN as per 6.2.2 if NO: use other means (e.g. EM Clamp) My question: 1. Are CDN's used for CE in EN55022 "suitable" CDN's for ethernet 10/100BaseT? (like ENY22 of R&S) I might assume these CDN will at least attenuate the ethernet signal and thus make the signal more sensitive to the AM coupled signal 2. Assumed the CDN is suitable, is it allowed to use an alternative method like EM Clamp anyway? As usual, many thanks for your valuable responses Regards, Kris Carpentier ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
