I have often wondered exactly why there are two classes in EN55022. The limits are pretty similar, does a 13dB difference in conducted emission QP limits really make a difference above 5MHz? I know the 23dB difference <5MHz (conducted emissions) helps with products that have a SMPS, for example. In the radiated emissions the difference is 10dB. In the real world is there really a need for two limits?
Enci >----- Original Message ----- >From: <richwo...@tycoint.com> >To: <emc-p...@majordomo.ieee.org> >Sent: Monday, February 04, 2002 1:40 PM >Subject: ITE Class A vs B Emissions > > >> >> We currently design our products to comply with the Class B emissions >limits >> of EN 55022, but I am getting a lot of pressure from engineering to allow >> the limits to be raised to Class A. The equipment is intended for business >> use only. I understand that Class A is legal in the EU for business >> equipment, and our customers don't seem to understand or care if the >> equipment is Class A or B. >> >> So, the question is this - Are you successful in marketing your business >ITE >> as Class A? >> >> Richard Woods >> Sensormatic Electronics >> Tyco International >> ------------------------------------------- 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: Michael Garretson: pstc_ad...@garretson.org 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: No longer online until our new server is brought online and the old messages are imported into the new server.
