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 > >----------------------------------------------------------------------------------- > GFS GPSDO list: > groups.yahoo.com/neo/groups/GFS-GPSDOs/info > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.