> .... By the way ;-)
>
> I found out the attenuator function of P1 and P2
> Very handy to set the threshold of the quantizer behaviour.
> I noticed that with critical voltages from my A155's with a knob
> fully cw the voltage of 0.970V in 1V modus was not enough to get
> a full scale from C to C.
> Now I made the threshold of the A156 a few mV earlier to deal with
> this problem.
>
> Cheers
>
> Jacco Ville
> The Netherlands

That's a solution. But the correct way would be to adjust the A-155 so that
it outputs 1.0V in 1V mode. For this a trimming potentiometer (P9') is
available on the upper A-155 potentiometer board.

Best wishes
Dieter Doepfer