Hi Of course it’s possible, you simply need enough high quality film capacitors to make up the control loop integrator. You probably also would use a pile of the same capacitors to slow down the PPS jitter a bit before it went into the loop. The setup process would probably involve a bunch of toggle switches or relays to walk the loop into the long time constant mode. You would be wise to put the caps all in some sort of oven arrangement. That way odd drafts hating the caps would not drive the GPSDO nuts.
Bob > On May 22, 2016, at 1:41 PM, Bernd Neubig <bneu...@t-online.de> wrote: > > Hello Fellow time-nuts, > I am looking for a simple solution to discipline my 10 MHz reference OCXO in > my private lab with an 1 PPS signal from a separate GPS receiver. > I am curious if there is a solution possible without programming a > microcontroller, as I am an old-fashioned "analogue" guy ;) > I am well aware, that such a solution would have a lot of disadvantages, as > it cannot effectively compensate for short-term variations. However I would > be happy if such a KISS solution could achieve a stability (STS) of better > 1E-10 over an hour. I know this is a damned long integration time for an > analogue integrator... > If that sounds too weird, I am open to receive advises for a microcontroller > based solution. > > Thanks a lot for your comments to come. > BTW: you need not to teach me about basics of short-term stability. I just > want to evaluate the limits of a possible analogue solution. For sure, that's > not real disciplining, but more like a long-tau integration PLL > > Best regards > Bernd DK1AG > > _______________________________________________ > 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.
