Recently, I and some co-workers worked overtime running down a problem with a new EMC receiver. It consistently read some 3 dB lower than one we bought a few years ago.
I finally slowed things down and we looked at the filter response shape (tiny steps, lots of them, and a narrow span). Aha! Where the old German receiver had a nice rounded curve, the new one was OK at the -6dB points, but looked like a dog's canine above that. If we weren't RIGHT on a carrier, it'd be measured lower. CISPR 16-1 specifies masks for IF bandwidth curves; I don't recall having seen one for MIL-STD tests, and that's probably why the German set was well behaved. I expect this is the beginning of an exciting discussion with the manufacturer. And another Banana Skin for our collections. Cortland Richmond KA5S - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
