Re: RF absorbers - 61000-4-3

2000-01-12 Thread Derek Walton
I echo Tony's words. I've just extended my chamber to 24' from 20', it makes a huge difference. I have some channel section left over if you need it... I replaced the flimsy roof section with 3" by 4" by 3/16" box section steel too, just to help keep the roof straight... Derek. "Tony J. O'Hara"

RE: RF absorbers - 61000-4-3

2000-01-12 Thread Matejic, Mirko
David, You might still have fighting chance to generate satisfactory field uniformity in the semianechoic room over the area appropriate to the size of your product. For products smaller than 5ft x 5ft, you can use lesser number of points to determine field uniformity. If you do so, you can delet

RF absorbers - 61000-4-3

2000-01-12 Thread Tony J. O'Hara
Hi David In my experience that is just a little too short. The smallest chamber I'm familiar with that would satisfy 61000-4-3 (80MHz -1GHz) is 7L x 3.4W x 3 H meters. This size is usually called a "compact" anechoic chamber. It can also be effectively used for pre-compliance of emissions testing!

RF absorbers - 61000-4-3

2000-01-12 Thread David Gelfand
Is it feasable to convert a 5 x 4 x 3 meter unlined shielded room to meet field uniformity requirements of 61000-4-3 using absorbing tile or wedges? Ballpark estimate? Thanks, David. David Gelfand Memotec Communications Inc. Montreal Canada - This message is coming from the emc-pst