On Mon, 15 Jun 2009 19:49:18 EDT, [email protected] wrote: > I have a question on the new CISPR22 ammendment that becomes effective > 10-2010. It requires free space emission measurements above 1GHz. This is > typically done with ferrite absorber on the chamber floor. > > How does one address this issue when testing on a 10 meter OATS? Are there > any site modifications needed? The OATS uses a mesh (chicken wire) for the > ground plane instead of solid metal panels.
We are going to put carbon-loaded expanded plastic absorbers (Riken PFP30) on the OATS floor, and also put them vertically to make some absorber walls to reduce reflection from the OATS walls. The absorbers are not compact but quite light, and we can move them easily. > Please also advise if there is any new site validation requirements to do > testing above 1GHz. In the past, if NSA is passing below 1GHz, the site would > be valid for testing above 1GHz. Site VSWR verification specified in CISPR 16-1-4 would be required. Regards, Tom Tomonori Sato <[email protected]> URL: http://homepage3.nifty.com/tsato/ - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ 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]>
