Wow! My experience a bit different. I've taken equipment to several test labs whose FCC data matches to better than 0.5 dB with the equipment generating data more than +/- 6dB! and this was simple equipment that I set up using/following photographs. I attribute that wild range to 'impedances' of the radiating sources somehow interacting with the test lab's structures making the radiating sources more, or less, energetic and therefore different emanation values.
>From memory, others have had similar experiences as discussed here. --- [email protected] wrote: From: Carpentier Kristiaan <[email protected]> To: [email protected] Subject: Re: [PSES] Failure of Radiated emission Date: Fri, 5 Sep 2014 15:35:16 +0000 Hi Doug, Assuming both labs are qualified as you say, you also make the assumption that the 2nd lab has full knowledge about the setup of the EUT. And that's exactly the problem. That 2nd lab doesn't know and thus results may be different, even fail, due to the relative positions of the EUT and all its cabling, sending other kind of traffic, etc.... If the 2nd lab has the report of the first, then results would be more or less the same. Best regards, Kris Carpentier - ---------------------------------------------------------------- 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]>
