Which CISPR standard? CISPR 22 (ITE) and CISPR 32 (ITE, Broadcast Receivers and Multimedia Equipment) top out at 6 GHz. The upper frequency (beyond 1 GHz) depends on the maximum frequency used in the product, not the power level.
Ghery Pettit -----Original Message----- From: Ken Javor [mailto:[email protected]] Sent: Tuesday, July 19, 2016 8:09 PM To: [email protected] Subject: Re: [PSES] outdoor EMC testing - questions Wow! I thought CISPR topped out at 6.5 GHz max, and I thought that was based on clock frequency. I would think a super-high power inverter would max out at 1 GHz, with the actual spectrum much lower. Unless of course there is a housekeeping power supply and clocked digital control system using a fast clock. Ken Javor Phone: (256) 650-5261 > From: "Sundstrom, Mike" <[email protected]> > Reply-To: "Sundstrom, Mike" <[email protected]> > Date: Tue, 19 Jul 2016 18:11:30 +0000 > To: <[email protected]> > Conversation: [PSES] outdoor EMC testing - questions > Subject: Re: [PSES] outdoor EMC testing - questions > > Ralph, > Back in a previous lifetime (at a test lab) I had a similar EUT to > test. You need to setup your antenna every 20 degrees or 30 degrees or > 45 degrees around the outside of the EUT at a 3 meter or 10 meters > measurement distance. You need to tailor the setup to the space you > have. You need to stay between any external metal and the EUT mass. > You need to discuss this with whomever is signing off on these measurements. They may want more or less test data. > > You also need to raise and lower the antenna from 1 to 4 m at each > azimuth and each polarity of the scan antenna. You should also scan > from 30MHz to 1GHz minimum, this would also need to be discussed with > the sign off group. The best scan you could do is 30MHz to 18GHz with > the Bi-con (30-300MHz) and a log periodic (300 - 1000MHz) and a double > ridge horn antenna (1 - 18GHz) . That would give you a good > understanding of just what you might see radiating in the real world installation. > > I wouldn't worry about the ground plane because it wouldn't be done > that way if you did it in situ (on site after installation). > > Are you not going to do any in situ testing on some of the sites after > installation? > > Thanks, > > Michael Sundstrom > Garmin Compliance Engineer > 2-2606 > (913) 440-1540 > KB5UKT > > "We call it theory when we know much about something but nothing works, > and practice when everything works but nobody knows why." -- Albert > Einstein > > -----Original Message----- > From: Ralph McDiarmid [mailto:[email protected]] > Sent: Tuesday, July 19, 2016 12:01 PM > To: [email protected] > Subject: Re: [PSES] outdoor EMC testing - questions > > Dear group, > > We are planning to do radiated emissions on a large EUT (a large power > converter) and use a portion of our outdoor, asphalt parking lot as an > open area test site. > We plan to walk an antenna around the EUT, since the EUT and its cabling are > too large to rotate on a platform. It will be installed in a way very > similar to actual use in the field, so I think this is quite close to > in-situ testing. > > 1. has anyone tried this? > 2. apart from a site attenuation test, and perhaps a ground plane > metal mesh, what else would be needed? > > We have facility filters for AC and for DC and voltage probe, current > probe, one "BiConilog" antenna and a nice new SA. We are working with > a US EMC company, and they are a Notified Body under the MRA. > > Thanks, > > Ralph McDiarmid > Product Compliance > Engineering > Solar Business > Schneider Electric > > > > > ________________________________ > This message was scanned by Exchange Online Protection Services. > ________________________________ > > - > ---------------------------------------------------------------- > 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 <[email protected]> > > 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 <[email protected]> > Mike Cantwell <[email protected]> > > For policy questions, send mail to: > Jim Bacher: <[email protected]> > David Heald: <[email protected]> > > ________________________________ > > CONFIDENTIALITY NOTICE: This email and any attachments are for the > sole use of the intended recipient(s) and contain information that may > be Garmin confidential and/or Garmin legally privileged. 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To post a message to the list, send your > e-mail to <[email protected]> > > 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 <[email protected]> > Mike Cantwell <[email protected]> > > For policy questions, send mail to: > Jim Bacher: <[email protected]> > David Heald: <[email protected]> - ---------------------------------------------------------------- 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 <[email protected]> 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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]> - ---------------------------------------------------------------- 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 <[email protected]> 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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
