Matthew, Adding a filtered SUBD-9 connector in the septum of your shielded room (or 2 filtered connectors in series ) allows you to route RS232 cable out of the room, and connect it to any suitable interface. Route the EUT RS232 cable to the centre of your turn table and along the floor to the septum, better is routed through a metal tube (conduit) connected all along to the rooms wall. Terminate the cable with a few ferrites to trunk off the excess length.
No need any more to search and find ($$$$$) a quiet laptop. (try to ask for one at the local PC store !!!!). No need to upgrade the laptop with any new windows version. I wonder how a formal test standard as 22/32 can depend on an arbitrary and unspecified test accessories such as a “quiet laptop”, or whatever other ancillary equipment in order to create formal results. And once you found a "quiet laptop", you need to qualify it for all kinds of cable connections and screen resolutions ($$$$) to ensure you are actually (not) getting the emissions you do not want. Not to mention the polluted spectrum plot with all "quiet" spuriouses that still get to -6dB of the limit, that can trouble your design team, and distract of the real problems. I am aware of the lack of support of CISPR 22 for the external cable setup but after all , no one stops you from retesting with a laptop on the table once your tested your peripheral as I sketched above, but do not complain if it fails due to some Class A harmonics of the laptops local bus that were not there before..... Regards, Ing. Gert Gremmen Approvals manager ------------------------------------------------------------------------------------ + ce marking of electrical/electronic equipment + Independent Consultancy Services + Compliance Testing and Design for CE marking according to EC-directives: - Electro Magnetic Compatibility 2014/30/EC - Electrical Safety 2014/35/EC - Radio & Telecommunication Terminal Equipment 99/5/EC Web: www.cetest.nl (English) www.ce-test.nl (Dutch) www.cetest.fr (under construction) Phone : +31 10 415 24 26 ------------------------------------------------------------------- This e-mail and any attachments thereto may contain information that is confidential and/or protected by intellectual property rights and are intended for the sole use of the recipient(s) named above. Any use of the information contained herein (including, but not limited to, total or partial reproduction, communication or distribution in any form) by persons other than the designated recipient(s) is prohibited. If you have received this e-mail in error, please notify the sender either by telephone or by e-mail and delete the material from any computer. Thank you for your co-operation. From: Ghery S. Pettit [mailto:n6...@comcast.net] Sent: Tuesday 9 May 2017 01:24 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] EN55032 host equipment... Matthew, The host computer goes in the chamber (or on the OATS) 10 cm away from the printer on the table. The same setup used for years in CISPR 22 or EN 55022. Find a quiet laptop and keep using it for future tests. Ghery S. Pettit, NCE From: Matthew Wilson [mailto:matthew.wil...@gbelectronics.com] Sent: Monday, May 8, 2017 3:33 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] EN55032 host equipment... In regards testing, for example's sake, a printer with a RS232 serial port under EN55032 for EMC, where does the host 'laptop' PC to generate the RS232 signals (most likely via a USB-RS232 adapter from the laptop's USB port) get located in the test setup? Inside the test chamber, where you might end up testing the performance of the laptop? Or outside the chamber via an 'extension lead' through a suitable aperture in the chamber on the RS232 line (and probably loaded with a set of ferrites to attenuate any external signals)? EN55032 does seem to conflict itself without a clear answer between #3.1.5 and #6.2... I'd rather check only the example printer device for EMC, which is the EUT of interest, rather than anyone else's laptop :-) Thanks for any pointers/discussion. 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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>
