http://www.ieee.li/pdf/essay/receiver_v_sa.pdf I just noticed you linked to a spectrum analyzer, yet I was talking as if we were discussing EMI receivers. There are several key differences even though I would have thought they were practically the same thing had I not done some research. I noticed the maximum sweep time on that spectrum analyzer is 1000s, or 16m40s. So that point about it taking hours may seem wrong (at first). But, for good measurements on a spectrum analyzer, you have to do only a small portion of the total bandwidth at once, because with, say, 30MHz to 1GHz frequency range, the measurements would be a whopping 2MHz apart! This is bad, because often, problem peaks may be very narrow digital ones, which could easily be missed without testing only a small portion of the spectrum at once. When that's taken into consideration, it may well take hours, but also require more human intervention during measurement. Before getting a spectrum analyzer, it might be useful to check out the link at the top (unless y! ou're already fully aware of the differences). I guess it really depends on what you're trying to do.
Elliott Martinson EMC Test Technician Electronic Theatre Controls 3031 N PLEASANT VIEW RD MIDDLETON WI 53562-4809 [email protected] -----Original Message----- From: Elliott Martinson [mailto:[email protected]] Sent: Friday, January 08, 2016 9:52 AM To: [email protected] Subject: Re: [PSES] pre-compliance spectrum analyzer At my workplace, we've got one of these: https://www.rohde-schwarz.com/product/esrp-productstartpage_63493-35077.html and it's pretty nice. Especially its huge dictionary of GPIB remote-control commands, which makes interfacing with LabVIEW convenient. R&S makes good products. However, I have never used nor seen the one you linked to. I noticed no mention anywhere of FFT/time-domain scanning on the page or the brochure (it'd be mentioned if it was a feature). That is a HUGE weak point IMO, if measurement time is at all important. There is no CISPR-Average scanning either, though RMS is probably similar enough. Are you trying to find something that's relatively inexpensive? Because it may be worth considering the expenses from the time costs as well. Time-domain scanning can make something that'd take several hours take only a few minutes, or possibly seconds (depending on context). If you stick to peak scans, it may not be so bad. It'll look noisier than quasi-peak, but that's okay since it's better to err on the side of less noise. -Elliott -----Original Message----- From: Amund Westin [mailto:[email protected]] Sent: Friday, January 08, 2016 2:05 AM To: [email protected] Subject: [PSES] pre-compliance spectrum analyzer Sorry for incorrect subject ... I'll try again: ------------------- Looking for a pre-compliance spectrum analyzer for in-house checking. Found this one from R&S. http://value.rohde-schwarz.com/vi/value/spectrum-analyzers/hms-spectrum-analyzer.html Anyone who have used this one? Regards Amund - ---------------------------------------------------------------- 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]> - ---------------------------------------------------------------- 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]>
