Doug It might not answer your questions but EN 301 489-34, which covers mobile phone chargers, stipulates a number of conditions including:
Representative generic test load An EPS Representative generic test load which is representative of a UE shall have the following characteristics: * A USB Micro-B socket connection. * An input capacitance of 1μF in parallel with the EPS output. * An input impedance with switchable range of: - 10k Ω (for 0 % rated current). - Selection of resistances to obtain the currents and output voltages of the test procedures. - A resistance to obtain Maximum rated current. * A shielded casing/enclosure. Emissions testing: The EPS shall be configured in order to ascertain the worst case radiated emissions and this shall be recorded. Tests shall then be carried out at the worst case, 10 % and 100 % of the rated output current and when disconnected from the Representative generic test load (no load condition). Regards Charlie From: Doug Powell [mailto:[email protected]] Sent: 21 May 2012 17:46 To: [email protected] Subject: [PSES] Off the shelf or brick smps My question for today. What is the typical test setup for radiated EMC measurements of general purpose off the shelf switching power supply; is the resistor test load tightly coupled to the output terminals of the PSU or is it on a long wire and taken down the 80 cm of the table and out of the test field? Is there any standard requirement for this and are manufacturers willing to publish this information? Thanks, -doug -- Douglas E Powell [email protected]<mailto:[email protected]> http://www.linkedin.com/in/dougp01 - ---------------------------------------------------------------- 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 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://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html 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://listserv.ieee.org/request/user-guide.html 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]>
