[time-nuts] Trimble 34310-T EFC Question

[Bob Stewart]

I think I may need to change the LPF feeding the EFC in my GPSDO to get rid of dithering jitter.  Is there any point in adding a resistor and cap in the EFC line, or do I need to go back and change the values in the op-amp circuit feeding it?  Currently an op-amp directly feeds the EFC pin.  I guess this boils down to something like: is there any meaningful current flow in EFC circuit in this oscillator?  Or should I add them but will I probably have to change the existing filter, as well?

Bob - AE6RV