Hi Grace, you may get a range of answers on this one...
We all do NSA, which makes sure the sites are within +/- 4dB of a "perfect" value. Surprisingly, some round robins have shown that a simple item measures on several sites vary by up to 20 dB. While a comb generator can be used, I prefer a reference radiator: the one that looks a bit more like a softball. However, if you want a true site comparison, I believe you should include test tables and operators too, hence a "real" test item is used. A proficiency program is available using that concept ( commercial warning here). So, my answer is .... it depends on what your goal is. Sincerely, Derek. Grace Lin wrote: > Dear Members, > > I am asked to perform site comparison and would like to hear your > comments. > > Should I purchase a signal source? If yes, do you have any > reference? I do have a COM-POWER comb generator and don't know if it > is good enough for the purpose. > > Should I use an EUT for site comparison? > > Thank you. > > Best regards, > Grace Lin > > > > > > > - > ---------------------------------------------------------------- > 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] <mailto:[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] <mailto:[email protected]>> > Mike Cantwell <[email protected] <mailto:[email protected]>> > > For policy questions, send mail to: > Jim Bacher <[email protected] <mailto:[email protected]>> > David Heald <[email protected] <mailto:[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]>
