Hello all, EN 61000-6-3:2001 (generic emission standard) includes requirements for conducted emission for "signal, control, d.c. power input, d.c. power output and other". The standard uses CISPR 22 as the basic standard here, and it says "Current probe measurement with line terminated to reference plane via 150 ohm" (in Table 1).
I could find no exemption in the standard, so I believe every electrical connections of the equipment should fulfil the emission requirement when the standard is to be applied. Questions here are: (1) If the cable is not shielded, where should we connect the 150 ohm termination resistor? All the conductors in the cable should be terminated? Or else, termination of one of the conductors (for example the signal ground conductor) can be enough? (2) What should we do when it is not possible to terminate the conductor in the cable, for example due to the functional reason (i.e., terminating the conductors can make the equipment unfunctional) ? (3) If the cable is shielded, I think we simply terminate the cable shield with 150 ohm as usual? Or "line" here means a conductor in the cable? Regards, Tom Tomonori Sato <[email protected]> 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 [email protected] 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: [email protected] Scott Douglas [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
