I second Brents comments. If you want to have something cheap and cheerful, just use an off shore sourced power supply. You most likely won't even have to take the filter out...
There is a reason good site sources cost so much. I have researched them a lot as well as designed a few for our proficiency program. Of all the sources, my preference is for the spherical radiators. I feel these are less affected by their surroundings and more consistent than a box with a rod sticking out. It's no good getting an awesome source and then not taking the stand into account.... It all depends on your goal. Cheers, Derek Walton L F Research EMC Lab Services Brent DeWitt wrote: > For low frequencies the overpriced EMCO conducted site source simply > used an off the shelf switching power supply with the filter caps and > chokes removed and a couple of different load resistors. With all the > scrap PC supplies around, you can't beat the price. Stability is > nothing to write home about of course. > > Regards, > > Brent DeWitt > Framingham, MA > > > -----Original Message----- > From: Ken Wyatt > Sent: Dec 7, 2009 7:43 PM > To: [email protected] > Subject: Re: [PSES] Reference RF Source - Recommendations/reviews? > > Hi Neven, > > I'm unaware of commercial site sources that can get down to kHz, > however, I should think that would be easy to build yourself. Just > use poor EMC techniques (fast edge speeds, etc.)! > > I've also reviewed a couple of commercial harmonic comb generators > by AET - one of which was just a couple days ago. Both are posted > to my Web site. I also developed a home brew comb generator that > covers up to 2 GHz, the details of which I divulge during my > seminars. :-) > > When I worked for Hewlett-Packard and later Agilent Technologies, > we commonly checked site-site correlation annually. The site > source was a custom affair using a high-precision > optically-controlled signal generator - all battery-operated. The > thing weighed a ton, but it was educational to see the results. > > Regards, Ken > ---------------------------------------------- > Wyatt Technical Services, LLC > 56 Aspen Dr. > Woodland Park, CO 80863 > > Email: [email protected] <mailto:[email protected]> > Web: www.emc-seminars.com <http://www.emc-seminars.com> > http://www.linkedin.com/in/kennethwyatt > > (719) 310-5418 > > > > On Dec 7, 2009, at 2:41 PM, Neven Pischl wrote: > >> (This ties to a previous thread on site comparison) >> >> >> >> I am considering getting a reference RF-source for two purposes: >> >> >> >> 1) Site/setup confidence check >> 2) Site comparison (by coupling it to a cabled-up DUT) >> >> >> >> My immediate interest is ~100 kHz up to 1-2 GHz, but I am also >> interested to use a reference source at higher frequencies. >> >> >> >> Does anyone have any recommendations regarding e.g. the following >> considerations: >> comb generator vs. noise generator, off-the-shelf vs. DIY, cost, etc. >> >> >> >> >> >> Thanks, Neven >> - >> ---------------------------------------------------------------- >> 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] <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] <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]>
