Hi It is a little strange that this problem still exist, the PC manufacturers have had many years to learn about EMC matters.
I have good experiences with Dell computers, but we have seen good IBM's too here at our lab. I haven't got any number/names but a labtop with as few I/O's and wireless as possible would be at good starting point. We have seen another problem when testing for CISPR 22 conducted on teleports, where a laser printer attached to the EUT was 20 dB over limit. Putting any other Ethernet device on the EUT port reduced the emission by 15 dB or more. We are satisfied if our customers can make a setup which pass the limit with a CE/FCC marked peripheral device and just note in the report what was attached the EUT. I don't see this as a world-wide problem to pass new products with old products attached, I think the problem is that there are a lot of non-compliance products out there. Best regards, Mr. Kim Boll Jensen Bolls Rådgivning Ved Gadekæret 11F DK-3660 Stenløse Phone: +45 48 18 35 66 [email protected] www.bolls.dk Fra: [email protected] [mailto:[email protected]] På vegne af John Woodgate Sendt: 14. april 2009 19:34 Til: [email protected] Emne: Re: "Quiet" Laptop In message <[email protected]>, dated Tue, 14 Apr 2009, Elliott Mac-FME001 <[email protected]> writes: >I have been asked by an associate if I can get a recommendation on a >model of laptop that would be sufficient for FCC Part 15 DoC tests of >peripherals that has a reputation for being "quiet". I note that this is for FCC purposes, but fundamentally, it's not an acceptable situation world-wide. Using products that are no longer in production is just not realistic. If it were, someone would use a stone-age product with a 4 MHz clock! Sooner or later, some spectrum management authority is going to object, and at that point every DoC becomes at least suspect, if not actually invalid. There is obviously an opportunity here for a niche manufacturer to propose to CISPR a 'standard portable computer' with low but reasonable emissions, for testing peripherals. It need not be costly on EMC test-gear scales, even allowing for the small volume. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Things can always get better. But that's not the only option. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - 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]> - 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]>
