Ralph, We had an indoor setup similar to what you describe back in the 1980s when I worked for Tandem Computers. The downsides of such a set-up are numerous. We had a Memorex facility on the other side of the wall (I have no idea what they did there) and whenever we found a signal the first question was, "Is it real, or is it Memorex?" In the middle of a parking lot you are going to have the same question, over and over again. Is the signal coming from the EUT or someplace else? I hope the EUT starts and stops operating quickly as I can see a lot of "Turn it off! Is the signal still there? Turn it back on and keep tuning." In your future. And good luck in the FM broadcast band and the television broadcast bands. Back in the days of analog TV testing in the TV bands wasn't too bad. You had a 6 MHz wide channel with a carrier for audio and a carrier for video. The actual video information was pretty low and generally not a problem. Now with digital stations basically owning that 6 MHz channel from one end to the other testing at an OATS (or in a parking lot) where TV stations are plentiful is difficult. Depending on where you are you may lose the ability to test in a fair amount of spectrum.
You will need a metal ground plane. Without it your chances of meeting NSA, especially in the vertical polarity, are slim. Best of luck. Let me know if you need more help. Ghery S. Pettit, NCE Pettit EMC Consulting LLC gh...@pettitemcconsulting.com -----Original Message----- From: Ralph McDiarmid [mailto:ralph.mcdiar...@schneider-electric.com] Sent: Tuesday, July 19, 2016 10:01 AM 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> - ---------------------------------------------------------------- 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>
