Hi If you talk to the engineers who design these gizmos, after about 15 minutes of their presentation, they come up with the point that the 1 pps lock setup isn’t quite what you might think. Yes, in some cases there are hints about this in the doc’s. In other cases …. not so much.
They design the 1 pps in as a “calibration” input. The idea is that you put it on the bench for an hour with a pps hooked up. At the end of the hour, the Rb is on frequency. You then store the calibration value and yank the pps. I’ve not run into any of them that seem to be designed for 24 hour / 7 day a week sort of pps in. Bob > On Apr 18, 2019, at 1:46 PM, Taka Kamiya via time-nuts > <[email protected]> wrote: > > Has ANYONE have a Rubidium module by Stanford Research, PRS-10, use 1 PPS IN, > and have watched it for extensive period using LadyHeather? I have 2 GPS, > and they are different models. It does the same thing with either one. > > I have, and every time, usually within 24 hours, it send one or more wonky > data. LH interprets as super high temperature and displays it. Today, it > has been running for about 18 hours and just today, it told me it was 40 > million degrees. (did it go super nova?) It does this periodically. Then > goes right back to normal operations. > > I know when PRS-10 starts up, it sends garbage data, so I have to turn on > PRS-10 first, then fire LH. I also know when power is interrupted, it does > this as well. I have upgraded the connection method and verified all > components are securely attached. > I've at this for more than few weeks and I don't know what else could be > wrong. I used two separate PRS-10 and they all behave this way. > > Calling technical support at SR, I was told when PPS IN is used to control it > via GPS, for example, extra CPU cycle is used. But they have not seen > corrupted data. (which could be a lie - but I'm just guessing here) > > --------------------------------------- > (Mr.) Taka Kamiya > I'm stuck in a wormhole.... Hello, worms! > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
