Careful -- for FCC emissions it's allowed only if correlation with an OATS is achieved for a given product. For the next product, correlation may have to be re-done.
For immunity to EN's, it isn't so clear. IEC 61000-4-3 is written as if any type of TEM cell is NON compliant, but a draft annex is now being circulated that would allow TEM cells, but ONLY if a TEM wave can be demonstrated throughout the frequency range being used (3-axis measurement, undesired vectors > 6 db down). For emissions to EN's, TEM cells are not allowed for compliance testing. Mike Hopkins [email protected] > -----Original Message----- > From: Leslie Bai [SMTP:[email protected]] > Sent: Wednesday, July 07, 1999 11:25 AM > To: Qu Pingyu; 'emc' > Subject: Re: GTEM cell > > > Pingyu, > > I guess GTEM cell is a good choice for your case. > Pls refer to IEC61000-4-3 (for immunity) and > ANSI C63.4 (for emission), GTEM cell is not only > recognized for pre-compliance test but also > can be used for compliance test as long as > some correlation can be achieved. > We did correlation through both modeling, simulation > using FDTD and actual testing to verify the results. > We are using GTEM cell for many different kinds of products > compliance test and PCB trouble-shooting. > It is pretty good. But you have to pay attention > to the uniformity volume of GTEM cell, it's > a bit tricky, especially the cabling of EUT may affect > the result, thus, during the correction, a harness > is supposed to be used to simulate the EUT cabling. > > Hope it helps. > Leslie > > --- Qu Pingyu <[email protected]> wrote: > > > > Hello, Everyone: > > > > I have some questions regarding the GTEM cell. Here > > in our Institute we are > > considering setting up some EMC measurement > > capability for precompliance > > testing. The EUTs we are dealing with are not very > > large, probably not > > larger than a desktop PC. Do you think that GTEM > > cell is a good choice ? Do > > many of you use GTEM as a precompliance testing > > facility ? Your comments are > > highly appreciated. > > > > Regards > > > > Qu Pingyu > > > > > > --------- > > 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). > > > > > > > > _________________________________________________________ > Do You Yahoo!? > Get your free @yahoo.com address at http://mail.yahoo.com > > > --------- > 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). > --------- 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).
