I read in !emc-pstc that scott....@jci.com wrote (in <of227b3f0b.4367e65e-on85256e00.0056b9fa-85256e00.0056d...@jci.com>) about 'CISPR 25 Conducted Emissions (Current Method)' on Thu, 18 Dec 2003: >Please read the attached document that he assembled for the details.
Not relevant to the question, but I'm very disappointed to see 'dB(ohm)'. The point is that this concept is mathematically nonsense. Consider V = IR 20logV = 20log(IR) = 20log I + 20log R Now consider P = I^2R 10logP = 10log(I^2) + 10logR So is the 'dB(ohm)' 20logR or 10logR? The UK national EMC committee has pointed this out to CISPR committees on several occasions, but the mistake keeps being made. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ 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: emc_p...@symbol.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://www.ieeecommunities.org/emc-pstc
