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]
Web: 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
-
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This message is from the IEEE Product Safety Engineering Society emc-pstc
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