Hi Actually that was Bob trying to explain Tom’s plots simply from looking at them. I *think* I got it right, but it’s Tom’s data and his LTE part. Others have commented that Tom’s part looks different than theirs.
Maybe Tom needs a Microsoft Windows Update on his GPSDO firmware :) For some reason the very thought of Microsoft getting involved in something like that makes me shudder… Bob > On Nov 23, 2014, at 5:33 PM, Said Jackson via time-nuts <time-nuts@febo.com> > wrote: > > Tom, > > From the looks of the plots these may be from the first proto unit with early > software no? Also was this with the indoor GPS antenna setup? > > The production units with outdoor or windowed' antenna should have > significantly improved average performance from the first unit and its early > GPS and GPSDO firmware versions. > > Bye, > Said > > Sent From iPhone > >> On Nov 23, 2014, at 14:18, Bob Camp <kb...@n1k.org> wrote: >> >> Hi >> >> There are two plots with activity changing at 300 seconds. The second plot >> (purple) is the removal of the paper at 300 seconds. The fourth plot (red) >> is the addition of the paper at 300 seconds. >> >> The last plot (green and blue) is ADEV with and without the paper. Blue is >> ADEV with paper. Green is ADEV without paper. >> >> The second to last plot demonstrates the unit meeting 1x10^-9 (peak to peak) >> frequency stability with the paper over a 1,000 second test. It shows it >> doing about 5X worse on frequency stability over the same period without the >> paper. Yes, that’s all with 1 second averaging. Changing the averaging would >> impact each of the results. It should change their ratio. >> >> Again back to the basic question: frequency over what period? Go to a 24 >> hour average and the results should be terrific. In some systems, that’s a >> useful number (I guess….). I rarely see people set their counters to an >> 86,000 second gate time :) >> >> Bob >> >> >>> On Nov 23, 2014, at 4:42 PM, Dr. David Kirkby (Kirkby Microwave Ltd) >>> <drkir...@kirkbymicrowave.co.uk> wrote: >>> >>> On 23 Nov 2014 16:25, "Tom Van Baak" <t...@leapsecond.com> wrote: >>> >>>> For plots and photos showing performance with, and without, and with >>> insulation see: >>>> http://leapsecond.com/pages/LTE-Lite/ >>>> The difference is dramatic, especially if you are used to working with >>> OCXO where this sort of effect does not occur. >>> >>> Tom, >>> >>> What plots are with and without the thermal paper? >>> >>> I see several graphs, but don't know what is under what conditions. >>> >>> The second graph shows something fairly significant happening at 300 s. Is >>> that where you removed the TP? >>> >>> Dave >>> _______________________________________________ >>> 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. > _______________________________________________ > 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.
