To All, We are performing BCI testing according to the test method described in ISO 11452-4 (Test Range 1MHz - 400MHz)
We are unclear on the statement described in Section 3 - "Test Conditions" regarding measuring the harmonics. The standard indicates that if a deviation in product performance occurs, the first 5 harmonics (relative to the carrier) must be measured. These harmonics must not exceed -9dBc. Here's where my question originates... The standard says "...it must be ensured that any of the first five harmonics (up to 400MHz) shall not exceed - 9dBc relative to the fundamental frequency....." I am looking for help with interpreting the text in the specification. 1. Does the text indicate that only harmonics with frequencies from 1 - 400MHz should be considered (carrier frequencies less than 80MHz)? 2. Does the text indicate that harmonics up to 2GHz (400MHz is the highest test frequency - multiplied by 5 harmonics = 2GHz) SHOULD BE MEASURED.? 3. other? Any help would be greatly appreciated. Thank you. Regards, Scott Mee EMC Engineer Johnson Controls Inc. PH: 616.394.2565 EMAIL: [email protected] ------------------------------------------- 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.
