[time-nuts] Fury Interface Board: 5MHz needed?

[Bruce Griffiths]

Peter Schmelcher wrote:
>> Is the worry, then, about the minor ambient temperature related
>> variations in steady-state oven current? Or something else?
>>     
>
> Tom the problem is easy to observe by cooling the OXCO with a fan and 
> watching the EFC change.
> I like to think of the issue in EFC steps. The OXCO's internal ground 
> bounce is about 100 DAC steps. A fresh off the shelf Z3816 main board adds 
> an additional 4mV of ground bounce so the total variation is a fraction of 
> 1000 DAC steps.
>
> Peter 
>
>
>   
Peter

How do you distinguish this effect from oven temperature variations due
to finite thermal gain, particularly with a single oven OCXO?
For small changes the effects are both linear.

Bruce