Hi
Ok basic GPSDO. You need:
1) The GPS PPS, and it's correction data
2) The OCXO
3) Something to drive the tuning voltage input to the OCXO
4) A way to compare the GPS PPS to the OCXO (usually to a PPS off of the
OCXO)
5) Some sort of digital processing to implement the control loop.
You have
Hi
The correction information is what transfers “all” the data on the PPS to the
control loop.
The PPS may be accurate to 12 ns and the correction word gets it the rest of
the way.
Keep in mind that the GPS PPS may be “wobbling” around by a couple of
nanoseconds
on a second to second basis. I
