Ralph, Back in a previous lifetime (at a test lab) I had a similar EUT to test. You need to setup your antenna every 20 degrees or 30 degrees or 45 degrees around the outside of the EUT at a 3 meter or 10 meters measurement distance. You need to tailor the setup to the space you have. You need to stay between any external metal and the EUT mass. You need to discuss this with whomever is signing off on these measurements. They may want more or less test data.
You also need to raise and lower the antenna from 1 to 4 m at each azimuth and each polarity of the scan antenna. You should also scan from 30MHz to 1GHz minimum, this would also need to be discussed with the sign off group. The best scan you could do is 30MHz to 18GHz with the Bi-con (30-300MHz) and a log periodic (300 - 1000MHz) and a double ridge horn antenna (1 - 18GHz) . That would give you a good understanding of just what you might see radiating in the real world installation. I wouldn't worry about the ground plane because it wouldn't be done that way if you did it in situ (on site after installation). Are you not going to do any in situ testing on some of the sites after installation? Thanks, Michael Sundstrom Garmin Compliance Engineer 2-2606 (913) 440-1540 KB5UKT "We call it theory when we know much about something but nothing works, and practice when everything works but nobody knows why." -- Albert Einstein -----Original Message----- From: Ralph McDiarmid [mailto:ralph.mcdiar...@schneider-electric.com] Sent: Tuesday, July 19, 2016 12:01 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] outdoor EMC testing - questions Dear group, We are planning to do radiated emissions on a large EUT (a large power converter) and use a portion of our outdoor, asphalt parking lot as an open area test site. We plan to walk an antenna around the EUT, since the EUT and its cabling are too large to rotate on a platform. It will be installed in a way very similar to actual use in the field, so I think this is quite close to in-situ testing. 1. has anyone tried this? 2. apart from a site attenuation test, and perhaps a ground plane metal mesh, what else would be needed? We have facility filters for AC and for DC and voltage probe, current probe, one "BiConilog" antenna and a nice new SA. We are working with a US EMC company, and they are a Notified Body under the MRA. Thanks, Ralph McDiarmid Product Compliance Engineering Solar Business Schneider Electric ________________________________ This message was scanned by Exchange Online Protection Services. ________________________________ - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> 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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com> ________________________________ CONFIDENTIALITY NOTICE: This email and any attachments are for the sole use of the intended recipient(s) and contain information that may be Garmin confidential and/or Garmin legally privileged. If you have received this email in error, please notify the sender by reply email and delete the message. Any disclosure, copying, distribution or use of this communication (including attachments) by someone other than the intended recipient is prohibited. Thank you. - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> 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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
