[time-nuts] Temex LPFRS-01 analog frequency adjustement

[Mark Spencer]

Greetings.  I'm wondering if any one has any insight (or wishes to speculate) as 
to how the external analog frequency adjustment on a Temex LPFRS-01 Rubidium 
standard functions.  

 
From experimenting with one over the last few days there seems to be a step 
function to the adjustment.   I'm wondering if frequency adjustment voltage is 
read by an  ADC which is monitored by the CPU which adjusts the frequency ?   
(Or perhaps I'm just not adjusting the multi turn trimmer properly.)   

Regards
Mark Spencer
VE7AFZ