Jim,
I've got a Rigol DSA815-TG and have never noticed any noise from its power
supply. Is that the model you're using? If you've got the same unit,
perhaps there a ground or shield connection that isn't making contact.
On the general subject of bench DMMs, I've been reviewing specs on the major
brands the past couple of days. The hands-down winner seems to be the new
Agilent 6-1/2 digit 34460A ($945) and its upscale version, the 34461A
($1085). This meter was released a few months ago and is an intended
replacement for the Agilent 34401A, the world's best selling bench DMM (but
a 20 year old design). The new meter has a gorgeous color display that puts
all the competition to shame. It's only real problem is that it takes a long
time to boot up. It's pricey, of course, (about the cost of an 8877) but in
the same ballpark as other top-ranked USA meters. Here's a lengthy review by
Dave, the crazy Australian bloke who's become the guru for on-line video
instrument reviews. (He also reviews the Rigol SA).
http://www.youtube.com/watch?v=SObqPuUozNo He has another video where he
tears down the Agilent meter to check out its workmanship and construction.
73,
Jim W8ZR
> -----Original Message-----
> From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Jim Brown
> Sent: Monday, May 12, 2014 12:58 AM
> To: amps@contesting.com
> Subject: Re: [Amps] Rigol DMM
>
> On 5/10/2014 9:09 AM, Paul Christensen wrote:
> > In case you haven't yet checked the EEVBlog forum, there are several
> > discussions on the DM3058E including display topics.
>
> I don't read this list, but I have observed that the PSU for my Rigol
> Spectrum Analyzer is one noisy RF pig. I learned that when I wanted to
> use it to study the EMC issues associated with various products, and
> figured out that some of what I was seeing was coming from the Rigol
> Not good.
>
> 73, Jim K9YC
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