Re: Clean class B test bed
Greetings all, In my days at an EMC test house, we used Dell Dimension series P1 -133 to 200's and PII 233-300's with great success. I think Micron may have used the same case as well. The dells were opened daily but kept their excellent shielding for at least 2-3 years. Good luck finding one, but if you can find someone still using one of these at their desk, I'm sure you convince them to upgrade. The cases were plastic looking on the exterior with one side that slid off. The insides of 5 sides of the case were a metal chassis inside and the removable side panel had a thin metal panel resembling a huge springfinger panel. I think they refreshed the plastic on the outside when they came out with PIII's, but the inside was still pretty much the same. Best Regards, Dave Heald --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
RE: Clean class B test bed
Hi Tony, I was in the same position last year. Dell Dimension 500 MHz was recommended to me. I bought mine refurbished and ended up with a faster motherboard. I ordered two of them which was a good thing because the shield was bad on one of the keyboards. For a monitor I used a NEC MultiSync LCD 1530v. Same problem, I ordered two of them and a shield or something similar was broken on one of them, but the other worked fine for Class B. Good Luck, George Stults WatchGuard Technologies Inc. -Original Message- From: Tony [mailto:raym...@bellsouth.net] Sent: Friday, February 08, 2002 11:19 AM To: emc-p...@ieee.org Subject: Clean class B test bed Hello, I am looking to find a clean Class B test bed (PC) for radiated emission testing. If anyone knows of such a thing please post the manufacturer, model number, any other information I would need to acquire one for use here. Thanks for the help. Tony Rayman
Re: Clean class B test bed
Tony,
When we had to test a 100MHz video "two board" system, weaknesses in grounding
structures of the PC's became extremely evident. Two stood out as the best
(best internal motherboard grounding) Gateway (best) and Dell (very close 2nd
best). No other PC's yielded a compliant system. [ Even had to "fuss" with
the grounding plates on the back.]
Sorry, don't know model numbers, but they were large with the proportions of
the old rack mount types.
- Robert -
Robert A. Macy, PEm...@california.com
408 286 3985 fx 408 297 9121
AJM International Electronics Consultants
619 North First St, San Jose, CA 95112
-Original Message-
From: Tony
To: emc-p...@ieee.org
Date: Friday, February 08, 2002 11:42 AM
Subject: Clean class B test bed
Hello,
I am looking to find a clean Class B test bed (PC) for radiated emission
testing. If anyone knows of such a thing please post the manufacturer, model
number, any other information I would need to acquire one for use here.
Thanks for the help.
Tony Rayman
Re: Clean class B test bed
Tony, When I was in the computer business, we looked for clean _peripherals_. But merely having one that has few emissions of its own is not enough. You also need to get one that neither sends any down its peripheral connections, nor passes those peripherals contribute to be radiated. This turns out to be a flaw in system testing; by choosing a (whatever) with good filtering itself, you might have problems in your own device and still pass. Compliance plus compliance is an unknown. Cheers, Cortland --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
Clean class B test bed
Hello, I am looking to find a clean Class B test bed (PC) for radiated emission testing. If anyone knows of such a thing please post the manufacturer, model number, any other information I would need to acquire one for use here. Thanks for the help. Tony Rayman
