Doepfer

.... 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

Verstuurd vanaf mijn iPhone SE Lunatik 

Op 18 aug. 2016 om 09:44 heeft yahoo@doepfer.de [Doepfer_a100] <Doepfer_a100@yahoogroups.com> het volgende geschreven:

>> Hello Dieter,
>> 
>> 
>> I have an issue with the A156.
>> 
>> Besides the small notes on your website about tuning the A156 is
>> there a more specific thing to measure?
>> Between the steps of 0.0833333 V there is a small window of quantizing.
>> When the voltage goes up and down there it switches differently.
>> I ask this because I used the P4 with a reference voltage of 1.00
>> , 2.00 , 3.00 and 4,00V.
>> Afterwards I used P1 and P2 to adjust but then I lost it a bit.
>> Within voltage steps everything seems ok but now I"ll have to put
>> the 0,083333 steps one by one and see if the output follows right?
>> Where are the points where the quantizer switches?
>> What is the factorysetting for that, when going voltage up and when down.
>> 
>> Hope that I made a clear explaination.
>> 
>> Best regards.
>> 
>> Jacco Ville
>> The Netherlands
> 
> I'd recommend to adjust the CV outputs with a wide spread (e.g. 0/5V). The
> difference has to be as close as possible to 5.00V (e.g. +0.016 and +5.016V
> or -0.03 and +4.97V), the absolute values are not important. The CV values
> in between are defined by the precision (linearity) of the used DAC and
> cannot be adjusted.
> 
> Best wishes
> Dieter Doepfer
> 
> 
> 
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