What levels would one expect to see from a scan (30MHz to 1 GHz) within a screened room prior to testing for emissions (UUT switched off).
I'm looking at an ambient scan starting at 32dBuV/m @ 30MHz, dropping to 18dBuV/m @ 70MHz then gradually (with small peaks and troughs) rising to 41dBuV/m @ 1GHz. Particularly at 30MHz and 1GHz this is less than 10dBuV/m below the EN55022 cl. B limits. Does this (high?) noise floor affect the final measurements? Thanks in anticipation. Russell. ------------------------------------------- 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: Ron Pickard: [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: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
