Anders I took an initial look at your work. No technical comments The presentation of details is excellent. I had not seen this quality in a wiki. Normally very simple. Look forward to a more detailed read. Thank you for sharing. Regards Paul WB8TSL
On Tue, Jan 14, 2020 at 1:59 AM Anders Wallin <anders.e.e.wal...@gmail.com> wrote: > prototype block-diagram, short list of chips in the implementation, and a > discussion on resolution now on ohwr.org: > https://ohwr.org/project/microstepper/wikis/Block-diagram > > The obvious way to increase resolution (make the smallest frequency step > smaller) is to lower the IF. > I guess the limit is that we don't want the IF to feed-thru the > phase-detector and PLL all the way to a PN-spur in the output-OCXO. > My first prototype used 97 kHz IF and that gives a resolution of 1.7e-17. > Lowering that by /2 or /4 might be a good idea? > Other comments and ideas welcome! > > Anders > > > > my plan is to present our DIY version of this, an open hardware design, > at > > EFTF2020. > > we have two AD9912:s clocked at 1GHz (derived from the maser) producing > > two LO's that drive a mixer-board that locks an OCXO that feeds a PICDIV. > > > >> > >> > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
