Dr Bruce Griffiths wrote: > Didier > > Unless you have a particularly poor 10811 it is likely that the measured > Allan deviation is limited by the instability of your GPS receiver > PPS output. > With a good GPS timing receiver setup you should expect an Allan > variance perhaps 5x lower than this as illustrated in Ulrich's article > for the AMSAT journal. > > Bruce > > Thank you Bruce, that is the kind of information I was looking for. The Jupiter will have to do for now, I have two of the same model. I may try a better antenna though. I got a link to the gpskit.nl web page, with a lot of information on the Jupiter, through an off-list message, and I will experiment with the settings in the receiver (mask angle primarily)
It seems all I have left to do is find the best way to close the loop (!) and try again against another 10811. I also still have a lot of experimentation to do over temperature, and check the stability of my distribution amplifier. I have learned a lot in the last few days, thanks to everyone on time-nuts who took the time to explain the details to me. I have a lot left to learn and experiment with, but at least I am aiming in the right direction :-) Didier KO4BB _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts