1Gbps uses all 4 pairs (8 wires) that requires 8 wire balanced ISN. Unlike EN55022:1998, new EN55022:2006 ALLOWS to use 8 wires ISN for ALL applications including 1 pair, 2 pairs, 3 pairs and 4 pairs (See Figure D.3, EN55022:2006) However, 10Mbps/100Mbps uses only 2 pair (4 wires) although the number of wires are 8. Since unused wires are not considered as "balanced pair", it would be still acceptable to use 2 pair (4 wires) balanced ISN for 10/100Mbps mode per 9.6.3.1 Thanks, Ben
_____ From: Larry Stillings [mailto:[email protected]] Sent: Friday, May 18, 2007 1:01 PM To: 'Pettit, Ghery'; [email protected]; Kim, Ben; [email protected] Subject: RE: EN 55022:1998+A!+A2 vs EN 55022:2006 Ghery, I need to ask about this one. All of the CDN / ISN adapters I have used including R&S, Fischer & Schaffner 4-Wire ISN/CDNs all have coupling networks for 4 interfaces and are labelled for E1, Ethernet, ISDN, etc., so you are saying the intent of CISPR 22 was to have all those interfaces tested with an Eight Wire ISN? This is news to me, how many others on this list? Thanks. Larry Stillings _____ From: Pettit, Ghery [mailto:[email protected]] Sent: Friday, May 18, 2007 3:49 PM To: [email protected]; [email protected]; [email protected] Subject: RE: EN 55022:1998+A!+A2 vs EN 55022:2006 CISPR 22 requires that you use an ISN based on the number of wires in the cable, not the number actually being used. All Ethernet tests should be done with an 8 wire ISN as Cat 3, Cat 5 and Cat 6 cables all have 8 wires. Ghery _____ From: [email protected] [mailto:[email protected]] Sent: Friday, May 18, 2007 12:35 PM To: Pettit, Ghery; [email protected]; [email protected] Subject: Re: EN 55022:1998+A!+A2 vs EN 55022:2006 Hi Ghery, It is a two balanced pair ISN, so of course Gigabit Ethernet will not function, but I had trouble with 100 Mbps working through the ISN. I couldn't get a ping through it, so the probes were used instead. Maybe a newer 8 wire ISN will do the job. Thanks, Tim _____ 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
