On 31.01.2013 09:05, Adrian wrote:
Rick,
the E3610A is really clean.
The discussion is interesting, but the original question did ask about
off the shelf so I have been watching for any mention of HP/Agilent
precision power supplies. The E3610A specification says 200 uVrms, 2mv
pp ripple and noise over the range 20Hz to 20 MHz. The now obsolete
HP6114A spec is much better at 40uVrms, 100uV pp up to 20MHz. The 6114A
is no longer available (except on eBay), but there should be something
equivalent or better.
I discovered the 6114A one day when I needed a nice stable voltage
source to check some data acquisition equipment. My first pick was a
gel-cel, but with a 34401 DMM you can watch those self-discharge. A
regular bench supply kind of wanders around. But after a few minute
warm-up the 6114A that I found sitting on a storage shelf was nice and
stable. I mentioned the specification for noise because I have observed
its stability, but have not made any measurements on its noise.
Gary
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