> Hi,
> as sayed in the title i like to calibrate my A-185-2 precission adder.
> It is not exactly 1V and not all Voltage adders are exactly 1V.
> ( no, this is no critsm )
>
> I must calibrate my VCOs and i like to have the precision adder as a
> reference.
> I see there are only two trimmers.
> some explanations would be appreciated.
> thanks

P2 on top right edge of the pcb is used to adjust the 1V coming from the
switches if nothing is connected to the sockets.
P1 in the lower section of the pcb is used to adjust the overall
amplification. There is no trimming potentiometers for each inputs as the
resistors in the input stages are manually selected to 0.1% by our
manufacturer. Consequently the difference between the different inputs
should be less than 0.1%.

Best wishes
Dieter Doepfer