Hi, I agree with the statements mentioned. It depends on the nature of the disturbance and you would have to find out what is happening during that period of time. I would also suggest to review CISPR 16-2-1, specifically to the definition of continuous disturbance.
Section 3 continuous disturbance RF disturbance with a duration of more than 200 ms at the IF-output of a measuring receiver, which causes a deflection on the meter of a measuring receiver in quasi-peak detection mode which does not decrease immediately Section 6.5 Interpretation of measuring results. 6.5 Interpretation of measuring results 6.5.1 Continuous disturbance The following steps shall be applied when interpreting the results for continuous disturbance measurements: a) At each frequency for which the level of disturbance is close to the limit and not steady, the reading on the measuring receiver is observed for at least 15 s for each measurement; the highest readings shall be recorded. Some product standards allow the exclusion of isolated clicks, which shall be ignored (e.g. CISPR 14-1). There are more conditions in this sections. Sincerely, [img] Dieter Paasche Senior Product Developer Electrical / EMC Compliance [email protected]<mailto:[email protected]> Work: (519) 744-8005 Ext. 7211 www.christiedigital.com<http://www.christiedigital.com/> [https://www.christiedigital.com/globalassets/resources/public/signatures/christie_logo.png]<https://www.christiedigital.com/> 809 Wellington St. N. Kitchener, Ontario N2G 4Y7 Canada [https://www.christiedigital.com/globalassets/resources/public/signatures/gradients/facebook_DB-B.png]<https://www.facebook.com/christiedigital> [https://www.christiedigital.com/globalassets/resources/public/signatures/gradients/twitter_DB-B.png] <https://twitter.com/christiedigital> [https://www.christiedigital.com/globalassets/resources/public/signatures/gradients/LinkedIn_DB-B.png] <https://www.linkedin.com/company/christie-digital-systems/> [https://www.christiedigital.com/globalassets/resources/public/signatures/gradients/instagram_DB-B.png] <https://www.instagram.com/christiedigital/> [https://www.christiedigital.com/globalassets/resources/public/signatures/gradients/Youtube_DB-B.png] <https://www.youtube.com/user/christieDigital> This e-mail message (including attachments, if any) is confidential. Any unauthorized use, distribution or disclosure is prohibited. If you have received this e-mail message in error, please notify the sender by reply e-mail or telephone and delete it and any attachments from your computer system and records. From: Charles Grasso <[email protected]> Sent: Monday, December 06, 2021 10:08 AM To: [email protected] Subject: Re: [PSES] Max Hold Quasi-peak ? CAUTION:This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Interesting topic! Completely agree with Brent!. I would only add the "quality" of the signal can also contribute to the variation - by that I mean if there is any kind of modulation on the signal then that will contribute to the measurement difficulties. It is also not unusual for a lab to sit on a signal if the signal has a noted time variance (this is from experience). On Sun, Dec 5, 2021 at 11:46 AM Amund Westin < wrote: This message originated outside of DISH and was sent by: [email protected]<mailto:[email protected]> Some weeks ago I went to a test lab as an observer on a CE marking project (IT product). I participated on the radiated emission testing and some frequencies were above the limit line during the scan (peak measurement). Later on, the Quasi-Peak measurement lowered the values significant and therefore with the result Passed. Later on, I was told that they continued the testing by 10-15 minutes and was logging the maximum Quasi Peak value (repetitive QP meas) on spike with the highest value. During these 15 minutes, one or two QP measurement was above the limit and the result was changed from Passed to Failed. I have not seen this test procedure before. I'm familiar with just one QP measurement on each frequency and not Max Hold QP on each for 10-15 minutes. Anyone who have experienced the same? Is it a CISPR procedure or just some overzealous lab engineers? Best regards Amund - ---------------------------------------------------------------- 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]<mailto:[email protected]>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html<https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Femc-pstc.html&data=04%7C01%7CDieter.Paasche%40christiedigital.com%7C29476a3fedd5450ac08508d9b8ca3a04%7Cdf46f062ad2c407688e6c675c789a0d8%7C0%7C0%7C637744000966549548%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=kuw10TXjY8Zd7h1NTXKzU6sd5JWd%2BWDHZ%2Bp4lN34bLE%3D&reserved=0> Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/<https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fproduct-compliance.oc.ieee.org%2F&data=04%7C01%7CDieter.Paasche%40christiedigital.com%7C29476a3fedd5450ac08508d9b8ca3a04%7Cdf46f062ad2c407688e6c675c789a0d8%7C0%7C0%7C637744000966549548%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=gzrgLwNMqUL7XRh7q4KJB4AiZcS7bFm1pqQE89LgR9Q%3D&reserved=0> can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/<https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2F&data=04%7C01%7CDieter.Paasche%40christiedigital.com%7C29476a3fedd5450ac08508d9b8ca3a04%7Cdf46f062ad2c407688e6c675c789a0d8%7C0%7C0%7C637744000966559543%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=RYvso41YLm6G%2F9eHk%2BwnS64iO8PZslwb3FjeLOCtffs%3D&reserved=0> Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)<https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flist.html&data=04%7C01%7CDieter.Paasche%40christiedigital.com%7C29476a3fedd5450ac08508d9b8ca3a04%7Cdf46f062ad2c407688e6c675c789a0d8%7C0%7C0%7C637744000966559543%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=6f67XGuubNvy1Ae36RPInWgSk3kY8CB1yF44sQri%2BX4%3D&reserved=0> List rules: http://www.ieee-pses.org/listrules.html<https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flistrules.html&data=04%7C01%7CDieter.Paasche%40christiedigital.com%7C29476a3fedd5450ac08508d9b8ca3a04%7Cdf46f062ad2c407688e6c675c789a0d8%7C0%7C0%7C637744000966569545%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=JTgcRjzRGGS89Sqv87GlARN4tPZvqvfAduu%2BzvTLt84%3D&reserved=0> For help, send mail to the list administrators: Scott Douglas <[email protected]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher <[email protected]<mailto:[email protected]>> David Heald <[email protected]<mailto:[email protected]>> -- Charles Grasso Dish Technologies (c) 303-204-2974 (h) 303-317-5530 (e ) [email protected]<mailto:[email protected]> (e2) [email protected]<mailto:[email protected]> - ---------------------------------------------------------------- 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]<mailto:[email protected]>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html<https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Femc-pstc.html&data=04%7C01%7CDieter.Paasche%40christiedigital.com%7C29476a3fedd5450ac08508d9b8ca3a04%7Cdf46f062ad2c407688e6c675c789a0d8%7C0%7C0%7C637744000966569545%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=6O%2BZTE8R0uUwaWJJs6XfA6iiFkgCrpSSAAosd55nGd8%3D&reserved=0> Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/<https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fproduct-compliance.oc.ieee.org%2F&data=04%7C01%7CDieter.Paasche%40christiedigital.com%7C29476a3fedd5450ac08508d9b8ca3a04%7Cdf46f062ad2c407688e6c675c789a0d8%7C0%7C0%7C637744000966579533%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=L8TlK%2Fe7uIZjKqFt131iNNGqWvyI7m0F%2BZZsoWaunzw%3D&reserved=0> can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/<https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2F&data=04%7C01%7CDieter.Paasche%40christiedigital.com%7C29476a3fedd5450ac08508d9b8ca3a04%7Cdf46f062ad2c407688e6c675c789a0d8%7C0%7C0%7C637744000966579533%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=cy0Ch2tPxkWdavnLijeNR8kdntYsIv9WBq1pm6I6sfY%3D&reserved=0> Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)<https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flist.html&data=04%7C01%7CDieter.Paasche%40christiedigital.com%7C29476a3fedd5450ac08508d9b8ca3a04%7Cdf46f062ad2c407688e6c675c789a0d8%7C0%7C0%7C637744000966589529%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=YtfSXtGqD1GO%2FFW09oiFjNDYCszn7aNn770otGthlGs%3D&reserved=0> List rules: http://www.ieee-pses.org/listrules.html<https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flistrules.html&data=04%7C01%7CDieter.Paasche%40christiedigital.com%7C29476a3fedd5450ac08508d9b8ca3a04%7Cdf46f062ad2c407688e6c675c789a0d8%7C0%7C0%7C637744000966589529%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=Had2kPPZrcOzrj9MQQOCTfjQ%2F6UNE6LltTY7fUHNiEw%3D&reserved=0> For help, send mail to the list administrators: Scott Douglas <[email protected]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher <[email protected]<mailto:[email protected]>> David Heald <[email protected]<mailto:[email protected]>> - ---------------------------------------------------------------- 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: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
