Ed: It is advantageous when the connectding line between antenna and EUT is not in line with (or parallel to) the welded gap, but at an angle of 10, 20, 45 degrees (Fahrenheit) or somewhere in the neighborhood. It improves the NSA. I ran across that about 15 years ago, verified the improvement and had to explain the situation to visitors, i.e. if you don't want to repeat yourself, leave things as they are "by nature". Greetings, Bogdan.
Price, Ed wrote: > There's one OATS here in San Diego which uses tack-welded sheets of > stainless steel. You really need your sunglasses there! > > Ed > > :-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-) > Ed Price > ed.pr...@cubic.com > Electromagnetic Compatibility Lab > Cubic Defense Systems > San Diego, CA. USA > 858-505-2780 (Voice) > 858-505-1583 (Fax) > Military & Avionics EMC Services Is Our Specialty > Shake-Bake-Shock - Metrology - Reliability Analysis > :-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-) > > > -----Original Message----- > > From: Scott Douglas [SMTP:s_doug...@ecrm.com] > > Sent: Thursday, February 24, 2000 5:34 AM > > To: ken.ja...@emccompliance.com; emc-p...@ieee.org > > 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 > > s_doug...@ecrm.com > > ECRM Incorporated > > Tewksbury, MA USA > > > > > > -----Original Message----- > > From: ken.ja...@emccompliance.com [mailto:ken.ja...@emccompliance.com] > > Sent: Wednesday, February 23, 2000 6:22 PM > > To: mur...@grucad.ufsc.br; emc-p...@ieee.org > > 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 <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). > > > > --------- > 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).
