It is perfectly legal (in Europe) to skip those tests that are not relevant to a device, as long as
you can support your decision. After all, your signing a DoC, saying that you accept liability for it’s conformance. How you came to this is irrelevant, as long as you can technically prove (or make acceptable) (both to yourself and to the authorities) that that is true. The new EMC directive requires this to be written down in a test report or Technical File, and this was not a requirement under the old directive. The more uncertain (read: ignorant)a technical authority is (that is not directed to Korea per se) is about its own technical capabilities, the more likely they will insist on testing everything. In those cases you will need to test a power dip on the PC with your mouse connected to show it will perform to Criterion B/C. And you will need to test conducted emissions to the mains to make sure the mouse is not adding unduly harmonic distortion. Gert Gremmen Van: [email protected] [mailto:[email protected]] Namens [email protected] Verzonden: donderdag 7 mei 2009 19:08 Aan: [email protected] Onderwerp: ANSI C63.4/CISPR 22 Testing Configuration Hello Group, I have a couple of questions regarding the minimum PC configuration when testing a USB device such as a mouse and the minimum testing requirements. CISPR 22 contains the following: For a personal computer or a personal computer peripheral, the minimum configuration consists of the following device grouped and tested together: a) personal computer; b) keyboard; c) visual display unit; d) external peripheral for each of two different types of available I/O protocols, such as serial, parallel, etc.; e) if the EUT has a dedicated port for a special-purpose device such as a mouse or joystick, that device shall be part of the minimum configuration. If my EUT is a USB mouse, and I use a laptop as the host PC and the laptop doesn't have serial or parallel ports, how does one address the minimum configuration? There are total of 3 USB ports, 1 video port, and 1 Ethernet port available on the PC. Also, for the testing (CISPR 22 & CISPR 24), I would like to only do radiated emission, ESD, and radiated immunity since the EUT is USB powered and the cable is less than 3 meters in length for any I/O tests. Is this legally allowed? My associates want to reduce testing costs so they want to avoid AC powerline testing and I/O cable testing. In my engineering experience, I have seen USB devices get affected when EFT is applied on a host PC powerline. Would RRL (Korea) allow the same policies as above? I will need to get KCC approval as well. We all know that they can be strictly by the book with no tolerance for deviation from the standard. Any documented references for allowing or not allowing the above issues would be appreciated. Thanks, Tim Pierce TAP Engineering ________________________________ Big savings on Dell's most popular laptops. Now starting at $449! <http://pr.atwola.com/promoclk/100126575x1222382499x1201454962/aol?redir=http:%2F%2Fad.doubleclick.net%2Fclk%3B214663472%3B36502367%3Bg> - 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. 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]>
