> you don't need 10kHz to build a GPS disciplined oscillator. GPSDOs are > build with control loop response times in the range of some hours, so > the loop will be absolutely happy with a 1PPS input.
This is quite true, but there are practical issues that cause many people to much prefer 10 kHz instead of 1 PPS. Cheap surplus Jupiter 10 kHz GPS boards are still very attractive for a homebrew GPSDO. GPSDO designs based on 1 PPS typically use a digital time interval counter. The beauty of using 10 kHz is that one can use analog phase comparisons and thus *avoid* the complexity of microprocessors, software, algorithms, voltage references, and DAC. The classic example of this is James Miller's ultra simple GPSDO: http://www.jrmiller.demon.co.uk/projects/ministd/frqstd0.htm You can see it performs extremely well: http://leapsecond.com/pages/gpsdo/ There are dozens of DIY GPSDO projects on the web using the same minimalist design. Use google image search to see them: https://www.google.com/search?q=GPSDO+Jupiter+10kHz&tbm=isch Alex -- if you need a concise list of URL's let us know. But I think those images will give you an excellent idea what others have built. /tvb -------- > Hi > where is a good source of GPS receiver modules I need one which has > 10kHz output to phase lock a quartz oscillator > > Thank you in advance > Alex _______________________________________________ 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.