[time-nuts] UBlox GPSDO

Alan Ambrose alan.ambrose at anagram.net
Fri Apr 17 12:45:06 EDT 2015


>>> The main thing is that there is a lot of jitter at 10MHz (much less at 8MHz) so you need to phase lock another oscillator to it.

Yes, as they've got most of the guts of a basic GPSDO in there with a VCTCXO - but it seems they missed the boat in making the divisor for 10MHz produce a jittery result.
It does have the ability to control an external OCXO as well, although that may not actually help much.

The application note is here btw:



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