[time-nuts] Jupiter modules: 1pps or 10kHz to lock an OCXO

[Patrick Reynaert]

Using the 10kHz output to lock an OCXO is common practice and seems to give good results. 

Has anyone tried to use the 1pps output? One  could first make a simple divider to create a 0.5Hz reference with 50% duty cycle, and then use this signal to lock an OCXO. This would also allow the use of other OEM GPS modules that don't have the 10kHz but only the 1pps signal.

Of course, as the 0.5Hz signal is much lower in frequency than 10kHz, the short-term stability is pushed more to the OCXO, making the requirements of the OCXO even harder.

But maybe the 1pps signal has better stability than the 10kHz signal? Or is this the same since these signals will only influence the long-term stability of the oscillator and have the same accuracy?

Any thoughts are highly appreciated.

Thanks,
Patrick.