Hello Douglas I have often asked the same questions.
I found a site which had an article written by Keith Armstrong about "Adding Up Emissions". The part that would interest you, as well as the other parts, is the section "Why CE+CE does not equal CE" Check site http://www.emc-journal.co.uk/971124.html Good Luck Joe Schembri RCIC - http://www.rcic.com Regulatory Compliance Information Center --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).