The Cyndustries List

Yes, thanks for the document, Cynthia!  I can add this to the BIAS 
switch section:

If you have a voltmeter, then with no Linear FM inputs measure the 
voltage on MOD OUT.  It should be about 1.0V with the BIAS switch to 
HIGH, zero volts in the middle, and about 0.2V (200 millivolts) on BIAS LOW.

Richard Brewster

tuninghead wrote:
> Hi all you Zeroscillinos,
>
> Cynthia did a great job condensing the testing and adjustment
> procedure into this document.  However, I noticed a tiny error in step
> 16 and in the interest of correctness and completeness, I type the
> following:
>
> [ALERT: ADJUSTMENT CAN CHANGE 1V /OCTAVE CALIBRATION] does not apply
> here.  Adjusting the quadrature shape control has no effect on the
> 1V/oct calibration.
>
> Also, a word about turning any of the trimmers, and that is, you
> probably don't have to.  All important voltages within the ZO are
> derived from a precision reference and unless you work on Mercury or
> Pluto, you probably won't have to turn anything.  The exception may be
> the 1v/oct trimmer in order to match your (uncalibrated) equipment. 
> Ahem.  And remember, let the thing warm up and settle before you
> consider doing anything.
>
> Just my $1/50,
> --Mark Barton
>
>
>   
>> 16. TEST: QUADRATURE (Advanced Procedure!)
>>
>> [ALERT: ADJUSTMENT CAN CHANGE 1V /OCTAVE CALIBRATION]
>>
>> Please Return to the Initial Set-up Conditions above in lines number
>>     
> 1 & 2.
>   
>> Turn both the MORPH_A and the MORPH_B Knob to full CCW or closest
>> to the TRIANGLE Icon next to the knob.
>>
>> Have look at the MORPH_90 Output on a scope and adjust trimpot VR501
>> (labeled QUADRATURE and located on the end of CYN109-B the bottom
>> PC board in the three-board sandwich).
>>
>> Play "pin the top on the mountain" with the trimpot until the
>>     
> triangle looks
>   
>> complete.
>>
>>
>>     
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