CISPR 16-1-1 Annex I has some good information on this.
I think that if you are referring to a swept spectrum analyzer, then yes a preselector is typically required to meet the quasi-peak detection requirements. An EMI receiver(stepped receiver) is tuned to a specific frequency and typically has a built in preselector. Also see CISPR 16-1-1 section 3.7 definition of a measuring receiver. Another consideration would be measurement in the respect to presence of intermodulation effects, CISPR 16-1-1 Section 5.7, where an internal or external filter may be needed measuring emissions that are close to a strong fundamental. Regards, Craig Harder EMC Test Lab Manager 600 N. Centennial Street Zeeland, MI 49464 Phone: 616.772.1590, ext. 5212 Cell: 616.848.5218 From: Robert Heller [mailto:[email protected]] Sent: Thursday, September 02, 2010 9:01 AM To: Subject: [PSES] Preselector I have a vendor that is telling me that a preselector for your EMI receiver is required for compliant testing for radiated emissions for Europe. I don't see anything in CISPR 16 stating this. Is the vendor correct? Bob Heller St. Paul, MN 55107-1208 Tel: 651- 778-6336 Fax: 651-778-6252 - 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html 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]>
