On Sat, 9 May 2015 12:27:51 +0200, "ce-test, qualified testing bv - Gert Gremmen" <g.grem...@cetest.nl> wrote:
> Partial Illumination is the term for the solution to your question. > EN 61000-4-3 mentions it explicitly. > Shift the antenna, and repeat the test until all areas have been > illuminated. > It requires some knowledge about the antenna angles and some basic > goniometrics... But, although I think that the requirement is rather useless when we are trying to simulate radio transmitters in close proximity, I believe we need to have UFA not smaller than 1,5 m x 1,5 m for partial illumination as specified in IEC/EN 61000-4-3. Regards, Tom > -----Original Message----- > From: Kunde, Brian [mailto:brian_ku...@lecotc.com] > Sent: Friday 8 May 2015 21:56 > To: EMC-PSTC@LISTSERV.IEEE.ORG > Subject: [PSES] Radiated Immunity at 1meter distance > > With the release of the 4th edition of IEC60601, we are being asked if > we can hit 28V/m for Radiated Immunity on the list of bands/frequency > called out in Table 9. In our current test setup in a large chamber > setup in a 3 meter FAR, we can barely hit 18 V/m CW at some frequencies. > Not sure about these Wireless frequencies until we try. There is a note > at the bottom of table 9 which states that we can test at a 1 meter > distance per IEC 61000-4-3, which should increase power but wouldn't > this also quite drastically narrow the size of the UFA? > > I'm sure I can calibrate a 0.5m x 0.5m window but the standard implies > that the Independent Window Method is only allowed for frequencies above > 1Ghz. I use a large log antenna below 1Ghz and since I've never tried > I'm not sure if the beam width limits the size of the UFA at a 1 meter > distance. > > Done anyone have experience with this and can give me some pointers > before I start wasting my time? > > I assume at a 1 meter distance, my UFA would be much smaller. How would > you recommend I perform the calibration test. In one example, the EUT > will be floor standing yet over 2 meters in length. We have to move the > EUT to test a section of it as a time as it is. > > The Window Method also wants you to position the transmit antenna in the > center of the Window, but at frequencies below 1Ghz, the radials on my > log antenna are so long I cannot lower the antenna to 1.05m off the > floor without the longer radials getting too close to the floor. > > Any help or advice would be helpful. > > Regards, > The Other Brian > > ________________________________ > > LECO Corporation Notice: This communication may contain confidential > information intended for the named recipient(s) only. If you received > this by mistake, please destroy it and notify us of the error. Thank > you. > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society > emc-pstc discussion list. To post a message to the list, send your > e-mail to <emc-p...@ieee.org> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > > Attachments are not permitted but the IEEE PSES Online Communities site > at http://product-compliance.oc.ieee.org/ can be used for graphics (in > well-used formats), large files, etc. > > Website: http://www.ieee-pses.org/ > Instructions: http://www.ieee-pses.org/list.html (including how to > unsubscribe) List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > Scott Douglas <sdoug...@ieee.org> > Mike Cantwell <mcantw...@ieee.org> > > For policy questions, send mail to: > Jim Bacher: <j.bac...@ieee.org> > David Heald: <dhe...@gmail.com> > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <emc-p...@ieee.org> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used > formats), large files, etc. > > Website: http://www.ieee-pses.org/ > Instructions: http://www.ieee-pses.org/list.html (including how to > unsubscribe) > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > Scott Douglas <sdoug...@ieee.org> > Mike Cantwell <mcantw...@ieee.org> > > For policy questions, send mail to: > Jim Bacher: <j.bac...@ieee.org> > David Heald: <dhe...@gmail.com> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
