User`s manual

CALIBRATION INSTRUCTIONS, continued
Play low C while playing low C on another synthesizer.
(Or have the MIDI output from the controller synth play the
Source.)
Adjust trimmer pot R127 until the two oscillators zero beat.
Now play C3, and adjust pot R123 to zero beat the oscillators
again.
Check the above two steps until the Source oscillator 1 zero
beats with the external oscillator.
Now modify the front panel setting so oscillator 2 mix is also set
to 99, oscillator 2 footage is 32', and the interval is set to 1.
Play C0 and zero beat the two internal oscillators by adjusting
R78.
Now play C3 and zero beat the oscillators by adjusting R72.
That's it!!