Cecil, When thinking of EMI guard band (margins), I put the following into mind: 1. variation in production (a couple of dB) 2. uncertainly during measurements (5-6 dB at lower frequencies like 30MHz) 3. variation from labs to labs (I don't know ....4-6 dB ?? )
I think 6-8dB should give you a good feeling. Amund -----Opprinnelig melding----- Fra: [email protected] [mailto:[email protected]]Pa vegne av [email protected] Sendt: 10. desember 2001 13:46 Til: [email protected] Emne: EMI guard bands From: Cecil A. Gittens I am in the process of putting a document together for products that are tested for Radiated & Conducted Emissions that should have a Guard-band of 6 dB for FCC or CISPR22 class A or B. Does it depend if the product is class A or B? Does anyone have any pointers or suggestions? Thanks. ------------------------------------------- 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] 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. ------------------------------------------- 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] 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.
