Chris, Not to often I can offer useful advice. But I know others on time-nuts have experimented with the digital dacs in the RBs. There was program quite a while ago that let you tweak them. Essentially it seems you can not get them exactly on because of the DAC step function. Granted they are crazy close, but this is time-nuts. Regards Paul. WB8TSL
On Fri, Mar 21, 2014 at 2:24 PM, Chris Albertson <[email protected]>wrote: > I'm working on doing exactly this right now. There is a "ton" of > information on how to build a GPSDO where the oscillator is an OCXO. > But it is almost exactly the same thing to build a "GPSDRb" The > only change is that rather then sending a command to control a DAC > that in turn controls the OCXO's EFC pin you send data to control the > Rb. Also of course use some different constants. > > There seem to be two different class of Rb. One takes an EFC just > like the OCXO so the controller looks just like a GPSDO and the other > class of Rb accepts serial commends to adjust the frequency. These > have an internal DAC. But either way the logic is the same. > > On Fri, Mar 21, 2014 at 6:20 AM, Anders Time <[email protected]> wrote: > > Does anyone have a copy of the QEX 2013 november article(Bill Kaune) > "Using > > GPS to Fine Tune a Rubidium Frequency Standard"? > > > > I´m really interested in this subject, but I can´t find this magazine in > > Sweden. I have contacted QEX, but it is very difficult to buy > back-issues. > > > > Have any one built this frequency standard and can tell me more about the > > project? > > You can access the source code for the project here: > > > http://www.arrl.org/files/file/QEX%20Binaries/2013/November_13/11x13_Kaune_PIC_Code.zip > > > > /Anders > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > -- > > Chris Albertson > Redondo Beach, California > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
