Octave kitten calibration procedure

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. Keyboard Current

. ADSR Attack Time

. Octave Transpose Cal.
. Pitch Bend Cal.

. VCO Volts/Octave

KITI'EN CALIBRATION PROCEDURE

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7. VCO Initial Pulse Width
8. VCO Triangle Symmetry
9. VCA Control Rejection
10. VCF Volts/Octave

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The following test equipment is required in order to perform calibration of the instrument.

1. A high input impedance digital voltmeter of at least 31/2 digit accuracy.
2. A DC Coupled, triggered oscilloscope.
3. A digital frequency counter, strobe tuner, or suitable Reference Frequency standard.
4. An amplifier with speaker or headphones capable of high fidelity.

Before beginning the calibration procedure, the following steps must be taken:

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NOTE:

Be sure that the instrument has warmed up for at least 1/2 hour
Connect the audio output to a monitor amplifier
Center the Octave Shift switch and Pitch Bend controls
Be sure that all modulation controls and glide are fully off
Fc control fully up and Q control fully down
VCA switch is in the BYPASS position

All pedal inputs disconnected

CALIBRATION MUST BE PERFORMED IN THE SEQUENCE PRESENTED.
FAILURE TO DO SO WILL RESULT IN AN IMPROPERLY TUNED INSTRUMENT.

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KI 'l'l'EN CALIBRATION PROCEDURE

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TRIMMER

TRIMMER LOCATIONS

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. Keyboard Current

. ADSR Attack Time

. Octave Transpose Cal.
. Pitch Bend Cal.

. VCO Volts/Octave

6. VCO Range

7. VCO Initial Pulse Width
8. VCO Triangle Symmetry
9. VCA Control Rejection
10. VCF Volts/Octave

PROCEDURE

1 KEYBOARD CURRENT

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Monitor the CONTROL VOLTAGE output (ring of the TO SLAVE
output jack) with a digital voltmeter.

Adjust the KEYBOARD CURRENT TRIMMER for a difference of
exactly 3.000 volts between the highest and lowest keys
depresses on the keyboard.

6 VCO RANGE

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Place the KEYBOARD CONTROL switch in the ON position.
Turn up the VCO Sawtooth slider.

Set the VCO TUNE controls to the 12 o'clock position.

Pin A2 on the keyboard.

Adjust the VCO RANGE TRIMMER until the frequency of VCO is
approximately 440 Hz.

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Place the KEYBOARD CONTROL switch in the ON position.

Pin high C on the keyboard.

Using the VCO FREQUENCY controls, tune VCO Reference
Frequency until zero beat.

Depress low C and adjust the VCO V/Oct Trimmer the frequency
of VCO is exactly three octaves below that of Reference
Frequency. At this point, zero beat will occur.

Repeat step 2, 3, and 4 until no further adjustment is necessary.

3 OCTAVE TRANSPOSE

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Leave the KEYBOARD CONTROL switch in the ON position.

Pin High C.

Tune VCO and Reference Frequency to zero beat.

Depress C2.

Place the OCTAVE Switch in the +2 position.

Adjust the OCTAVE TRANSPOSE TRIMMER for zero beat between
VCOl and Reference Frequency.

4 PITCH BEND

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Repeat steps 1, 2 and 3 for the OCTAVE TRANSPOSE adjustment.
Depress C3.

Place the PITCH BEND slider in the +1 position.

Adjust the PITCH BEND TRIMMER for zero beat, between VCOl
and Reference Frequency.

7 VCO
INITIAL PULSE WIDTH

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Turn up the VCO JUL slider and turn all other audio sources
fully off.

Check that PULSE WIDTH control is fully off.

Monitor the synthesizer output with an oscilloscope.

Adjust the VCO INITIAL PULSE WIDTH TRIMMER for 50% duty
cycle.