Ken, Commonly available shielded rooms are made from galvanized steel panels. Does your comment mean that these chambers are not very good for the ground reference for conducted emissions tests?
Don Umbdenstock > ---------- > From: Ken Javor[SMTP:ken.ja...@emccompliance.com] > Reply To: Ken Javor > Sent: Wednesday, February 23, 2000 6:21 PM > To: Muriel Bittencourt de Liz; Lista de EMC da IEEE > Subject: Re: conducted emissions test setup > > > 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 <mur...@grucad.ufsc.br> > >To: Lista de EMC da IEEE <emc-p...@ieee.org> > >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: mur...@grucad.ufsc.br > > ICQ#: 9089332 > > > > --------- > > This message is coming from the emc-pstc discussion list. > > To cancel your subscription, send mail to majord...@ieee.org > > with the single line: "unsubscribe emc-pstc" (without the > > quotes). For help, send mail to ed.pr...@cubic.com, > > jim_bac...@monarch.com, ri...@sdd.hp.com, or > > roger.volgst...@compaq.com (the list administrators). > > > > > > --------- > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to majord...@ieee.org > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to ed.pr...@cubic.com, > jim_bac...@monarch.com, ri...@sdd.hp.com, or > roger.volgst...@compaq.com (the list administrators). > > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
