On Mon, 29 Nov 2004 09:25:33 +0200, <ari.honk...@nokia.com> wrote: > While I don't usually use that standard, let me say some thoughts on this. > > 1) That's the difficult part. If your interface allow a longer > cable, you can use an additional section of shielded cable (maybe > some 20-30 m, or more) in series of the unshielded cable, and > utilize the capacitive coupling from wires to shield. Shield is then > connected to ground with suitable resistor. > The common mode impedance is formed by the capacitance and resistor > is series. Long cable will make some resonance problems that need > to be attenuated by ferrites and such. Needs tuning but finally it > will work. > > Check first if any IEC 61000-4-6 CDN's are available, they are also > 150 ohm devices.
Oh, well. I misunderstood the sentense "terminated via 150 ohm" as "terminated via a 150 ohm resistor", but I now understand it is not what the standard says. Thanks. Regards, Tom Tomonori Sato <vef00...@nifty.ne.jp> URL: http://homepage3.nifty.com/tsato/ 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 emc-p...@ieee.org Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Scott Douglas emcp...@ptcnh.net 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://www.ieeecommunities.org/emc-pstc
