[time-nuts] Trimble 65256 OCXO

[Hal Murray]

tractorb at ihug.co.nz said:
>  I thought it may be a reference supply for the EFC pin- with a 12.03 volt
> supply the unknown pin measures at 2.803 volts-which is usefully above the
> required EFC voltage ( ~2.4 volts) to bring it on frequency.
>  But does anyone have some hard data on this 'unknown' pin? 

Is it input or output?  What happens if you pull it to ground with a 10K or 
1K resistor?  Or measure the impedance when powered off.

2.8 volts seems a bit low to be a useful supply.


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