Hi Clay,
Powering the GPSDOs isn't a problem. They run on 12V and draw less than an
amp. The problem is that 5370 is a big hulking power sink and it appears that
when it's hit with a spike it lets its displeasure be known in the data.
Bob
-----------------------------------------------------------------------------------
GFS GPSDO list:
groups.yahoo.com/neo/groups/GFS-GPSDOs/info
From: Clay Autery <caut...@montac.com>
To: time-nuts@febo.com
Sent: Thursday, July 7, 2016 10:09 PM
Subject: Re: [time-nuts] The home time-lab
You'd be better off running the GPSDO off a LiFePO battery and float
charge the battery with an appropriately constructed linear PS...
ALL but the most expensive UPSs use switch-mode power supplies... to
power the load when on mains.
______________________
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389
On 7/7/2016 7:44 PM, Bob Stewart wrote:
> I hope this isn't too far off topic, as this is having a big impact on my
> testing.
>
> I decided to run an A/B test on one of my GPSDOs: comparing the phase of the
> two 10MHz output channels. In the middle of the night, there was a long
> series of 35ns pops in the phase data. Strangely enough, there was nothing
> in the data collected directly from the unit involved. The preceding two
> days we had had a number of switching transients where the lights blinked but
> nothing shut down. So, putting one and one together, I suspect that a fair
> percentage of the strange results I've been getting has been power-grid
> related.
> So, what to do? I've been looking at UPS devices, and I don't even
> understand enough to waste my money on a bad one. The two big questions seem
> to be "on-line" and "sine wave". Make that three: can I trust the mfgs
> claims? Is there something affordable that could run a pair of 5370s and
> maybe another 50W worth of DUTs for up to an hour or two and not be prey to
> power-line transients? Or would it be more cost effective to somehow monitor
> the power line for spikes or phase jumps and blow off tests or cut out the
> offending data? From time to time we get a thread on power-line nuts.
> Should I have been paying more attention?
>
> Bob - AE6RV
>
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