I suggest there is an important distinction between "video averaging" and "average detection using limited VBW".
If this is correct, can someone enlighten those of us who are unsure? Ralph McDiarmid, ASc Compliance Engineering Group Xantrex Technology Inc. From: owner-emc-p...@ieee.org [mailto:owner-emc-p...@ieee.org] On Behalf Of Cortland Richmond Sent: December 16, 2004 1:04 PM To: Alex McNeil; ieee pstc list Subject: Re: Conducted Emissions PK/AVG Alex McNeil asked: >> Is the problem that the Test House may have used "AVG BW 30KHz" and >> this should have been "AVG BW 9KHz" the problem << Sure looks like it from what you posted. There've been discussions here -- it comes up every so often -- how to to do averaging on a SA. Without knowing how they did, it's hard to say for sure, but it looks like you are close enough to hit the target with a hand grenade anyway. But are you sure it doesn't say 30 *Hz*? Narrowing the bandwidth 'way down is a method used to get averaging on a SA. (I will speculate that someone might have "learned" to -- incorrectly -- use video averaging in dB mode then increase BW to compensate for the error that causes.) Cortland Richmond 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: 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 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: 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
