Ralph noted:> For the Method yes, but as John Woodgate pointed out, you need another CISPR or> EN standard to defined limits. They used IEC 61000-3-3 Cl. B for the conducted emissions. On top of that, the QP data we saw showed a smooth line from (~ 90dBuV at 168 kHz "corrected"), on a linear slope down to ~ 1MHz, whereupon the data started looking like a typical EMC plot; jagged lines with some peaks. The first peak was at 2MHz. Both me and the Engr VP looked at the plot on a big screen, and said ... WTF? The Averaged data showed only very small squiggles with the same slope, starting at 58.6dBuV at 170 kHz "corrected" and started showing regular sized peaks and bumps at about 2 Mz. These are the weirdest test results I've seen; but I have no where the experience as most of you. We're meeting again with the customer this afternoon, and I'm still poorly informed on: What is the hazard or risk? Colorado Brian Please note: message attached
From: Ralph McDiarmid <[email protected]> To: [email protected] Subject: Re: [PSES] Hazards, risks with EMC emissions? Date: Tue, 26 Aug 2025 13:34:20 -0700 - ---------------------------------------------------------------- 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 [email protected] All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/[email protected]/ Website: https://ewh.ieee.org/soc/pses/ Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) List rules: https://pses.ieee.org/wp-content/uploads/2024/12/EM-PSTC-List-Rules.pdf For help, send mail to the list administrators: Mike Sherman at: [email protected] Rick Linford at: [email protected] For policy questions, send mail to: Jim Bacher: <[email protected]> _________________________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
