[time-nuts] UBlox GPSDO

[Alan Ambrose]

Re LEA-M8F



>>> 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:

https://www.u-blox.com/images/downloads/Product_Docs/Timing_AppNote_%28GPS.G6-X-11007%29.pdf

Alan