OK, y'all have had a lot of fun with it. I WAS WRONG! Sorry! ---------- >From: [email protected] >To: [email protected] >Subject: RE: conducted emissions test setup >Date: Thu, Feb 24, 2000, 10:00 AM >
> Gert et al, > > A non-ferrous OATS requirement (or preferred)? That's a new one on me too. > > But I know this is technically true for the EFT/ESD tests, Cu and Al are listed > as possible ground references, but not steel. > > I guess we are lucky in that *our* new OATS ground plane, new conducted emission > lab, ESD, and EFT ground references are all non-ferrous because they are made > entirely of sheet aluminum (~ 5mm thick) and joined with thin aluminum flashing > for RF continuity. Steel is used to mechanically support the vertical reference > plane for the conducted emission lab. :P > > Best Regards, > Eric Lifsey > National Instruments > > > > > Please respond to "Scott Douglas" <[email protected]> > > To: [email protected], [email protected] > cc: (bcc: Eric Lifsey/AUS/NIC) > Subject: RE: conducted emissions test setup > > > > > > > Ken, > > The ground plane should be non-ferrous? That is a new one to me. Are all the > OATS I have been to using non-ferrous ground planes? Never really noticed > that before. I thought they were all galvanized steel. Somebody please > enlighten me. > > Scott > [email protected] > ECRM Incorporated > Tewksbury, MA USA > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] > Sent: Wednesday, February 23, 2000 6:22 PM > To: [email protected]; [email protected] > Subject: Re: conducted emissions test setup > Importance: Low > > > > The ground plane acts as a sink for common mode CE. Without it, you have > an > uncontrolled test. > > The ground plane should be non-ferrous. Cu or bronze or even Al will work, > but you can solder to Cu and bronze, but not to Al. > > The ground plane is common with the green wire. > > The LISN must definitely be bonded to the ground plane. The analyzer is > connected by virtue of the coax connection to the LISN EMI port. That is > technically sufficient. > > The spectrum analyzer should have its power input sufficiently > well-filtered > to be able to share a power connection with the PC. If not, they can be > fed > from different circuits. The green wire should be common to both circuits. > > ---------- >>>From: Muriel Bittencourt de Liz <[email protected]> >>>To: Lista de EMC da IEEE <[email protected]> >>>Subject: conducted emissions test setup >>>Date: Wed, Feb 23, 2000, 8:32 AM >>> > >>> >>> Hello Group, >>> >>> Reading CISPR 16 and CISPR 22, I had some doubts about the correct setup >>> for doing conducted emissions testing. I'd like to know if someone can >>> put a light on this subject. >>> >>> My questions are: >>> >>> - The "ground plane" is really needed? If I don't use one, my results >>> will be wrong? Or without a ground plane I'll be testing for the "worse >>> conditions"?? >>> >>> - The ground plane can be made of any metal? Or there are specified >>> ones? >>> >>> - The ground plane must be bonded to the GND connector of my mains? (my >>> outlet is three pins: P, N and GND) >>> >>> - If I understood, the ground plane will be my "reference ground", >>> right? >>> >>> - My testing equipment (receiver+LISN) must be bonded to this same >>> ground plane? The ground plane is bonded to the ground connector of my >>> mains? >>> >>> - I use a PC to collect the test data. Can it be feeded by the same >>> circuit that feeds the EUT+LISN? The ground connector of the PC (the one >>> that's in the three pin plug) should be at the same ground than the >>> ground plane? >>> >>> Thanks in advance and Regards! >>> >>> Muriel >>> >>> -- >>> 8-)8-)8-)8-)8-)8-)8-)8-)8-)8-)8-)8-)8-)8-)8-)8-)8-)8-)8-)8-)8-)8-)8-) >>> Muriel Bittencourt de Liz, M.Sc. - EMC Engineer >>> GRUCAD - Group for Conception & Analysis of Electromagnetic Devices >>> Santa Catarina Federal University - UFSC >>> PO Box: 476 ZIP: 88040-900 - Florianópolis - SC - BRAZIL >>> Phone: +55.48.331.9649 - Fax: +55.48.234.3790 >>> e-mail: [email protected] >>> ICQ#: 9089332 >>> >>> --------- > > > > > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
