Hi Brendan: It's interesting that the PRS10 can time stamp the 1 PPS input with a resolution of 10 ns. I wonder how they do that. http://www.thinksrs.com/downloads/PDFs/Catalog/PRS10c.pdf
When I picked up my PRS10 at the factory during the tour I learned that the 10 MHz oscillator in the PRS10 was an improved version of the SC10. There's an Allan plot for the PRS10 at: http://www.thinksrs.com/products/PRS10.htm <- overall PRS10 page http://www.thinksrs.com/assets/instr/PRS10/PRS10diag2.htm <- Just the plot Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Brendan Minish wrote: >On Tue, 2006-12-19 at 11:05 -0800, Brooke Clarke wrote: > > >>Hi Brendan: >> >> > > > >>Keep in mind that this design does work and that the above items relate >>to optimization not bug fixes. >> >> > >I currently have the Brooks Shera design disciplining my LPRO-101 >without any mods and using the ADC connected directly however the gain >is not high enough for the small EFC range of the LPRO. >It does work, it will keep it locked OK even with the longest >time-constant and the figures appear to make 'sense'. I guess that with >the excellent stability of the Rubidium Oscillator the lack of loop gain >may even be an advantage as it will reduce sensitivity to other sources >of short and medium term error > >I certainly intend trying the modified PIC software to improve gain and >lengthen the filter time. > >I would however be most interested in building and comparing with an >alternative discipline arrangement > >Anyone care to comment on projects based around the SRS PRS10 module and >how it fares out in the scheme of things ? > >73 >Brendan EI6IZ > > > > > >_______________________________________________ >time-nuts mailing list >[email protected] >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
