Thank you very much, John. One more question: What is the role of CISPR 16 series to CISPR family standards, such as CISPR 15? For example, I though disturbance voltage measurement mentioned in CISPR 15 should follow CISPR 16-2-1. From what I have learned from you, it seems CISPR 16 series are independent to other CISPR standards. Am I right? Figure 6 and Figure 7 of CISPR 16-2-1 clearly specify vertical and horizontal reference planes. On 1/26/09, John Woodgate <j...@jmwa.demon.co.uk> wrote:
In message <zjykyqhtlfejf...@jmwa.demon.co.uk <mailto:zjykyqhtlfejfw%...@jmwa.demon.co.uk> >, dated Fri, 23 Jan 2009, John Woodgate <j...@jmwa.demon.co.uk> writes: Based on these, my colleague insists groundplanes are not required when perform measurement on relay switches and dimmers. Do you agree with the argument? Well, 8.1.3 and Figure 5 apply, and I can't see any reference to a ground plane. So your colleague APPEARS to be right. But I suspect that there is a problem with the standard, because the AMN is always used with a ground plane. I have *unofficial* agreement that the current CISPR 15 does not call for a ground plane in 8.1.3. However, this does seem to my colleagues to be an error, and the standard may have to be amended. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk <http://www.jmwa.demon.co.uk/> and www.isce.org.uk <http://www.isce.org.uk/> Things can always get better. But that's not the only option. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ 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 <emcp...@ptcnh.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com> - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ 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 <emcp...@ptcnh.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org> David Heald <dhe...@gmail.com>