[time-nuts] LPRO 101 ADJUSTMENT

[Neville Michie]

Hi Jeff,
if you read the manual you will see (there is a partial circuit  
diagram) that the external voltage trim is added
to the voltage on the internal trim-pot, so both adjustments have the  
same effect.
I was thinking of using an 8bit DAC to put a very small correcting  
voltage on the electrical input while
I use the internal pot to adjust it centre scale or if it runs off  
scale. That way I can get microhertz steps
of adjustment from an external circuit without an extreme stability DAC.
cheers, Neville Michie



On 26/07/2008, at 8:51 AM, jshank wrote:

> Hi,
>
> I recently acquired a LPRO 101 Rubidium Oscillator.  After reading the
> manual I see that there are two ways to adjust the frequency 1)  
> using and
> adjusting screw on the unit and 2) using the External C-field  
> control signal
> at pin J1-7.  Has anyone experimented with either method and if so  
> what
> method was preferred?
>
> Jeff
>
>
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