5 . Using a small screwdriver with an insulated handle, turn
OSCILLATOR 1 high end adjustment (A) and tune OSCILLATOR 1
using zero beat method two octaves above the reference os-
cillator. (Do not touch metal shaft of screwdriver as this
will affect tuning).
6 . Depress lowest A on keyboard and zero beat one octave below
reference oscillator, using OSCILLATOR 1 low end adjustment (B).
7 . Set OSCILLATOR 1 range to 32’ and adjust using octave tune
adjustment (G) zero beat one octave below reference oscillator.
8 . Turn off reference oscillator.
9 . Set OSCILLATOR 1 to 2’ range.
1 0 . Turn on OSCILLATOR 2.
1 1 . Tune OSCILLATOR 2 to OSCILLATOR 1, using OSCILLATOR 2 high
end adjustment (C).
1 2 . Depress lowest A key and zero beat OSCILLATOR 1 with OSCILLATOR
2 using OSCILLATOR 2 low end adjustment (D).
1 3 . Repeat steps 9 through 12 tuning OSCILLATOR 3 to OSCILLATOR 1.
_ _ _ _ _ _ _ _ _ _ _ _
*
_ _ _ _ _ _ _ _ _ _ _ _
HOW TO TUNE THE FILTER
(This is factory set and rarely, if ever, needs adjustment)
1 . Set the front panel controls as shown in Figure 2.
2 . Insert S-TRIG Shorting Plug supplied with the instrument.
3 . Adjust filter resonance threshold adjustment (H) until tone
is barely audible.
4 . Turn FILTER EMPHASIS control on front panel to 10.
5 . Turn on A-440 reference oscillator.
6 . Tune filter resonance to A-440 tone using filter pitch
adjustment (K).
4 / 1 2 / 7 2
FIGURE 2
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