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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Re: Updated! ZEROSCILLATOR TESTING PROCEDURE Version 2.0
2006-08-05 by tuninghead
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