5
THE VOICE MODULES
The panel controls on each module are identical. In the diagram
above they are grouped by similar functions for easy under-
standing. The asterisks in sections la, 2a, 3, 4, 7, 8, and 10
are for use in the following section of the manual.
la, 2a. These are the MANUAL TUNING CONTROLS for VCO 1 and
VCO 2 respectively. The lower flanged portion of each knob is
for coarse tuning, and the upper part of the knob is a vernier
fine tuner.
lb, 2b. The three-position switch selects one of three control
signals, indicated on the panel, to be routed through the
rotary pot just above the switch. If this knob is rotated to
the right, the selected control voltage will affect the VCO
pulse width.
If this knob is rotated to the left, the selected
control voltage will affect the VCO
frequency.
If the knob is
left in its vertical position (as in the photograph), the
selected control voltage will have
no effect on the VCO at all.
1c, 2c. These are MANUAL PULSE WIDTH CONTROLS for the two
oscillators. At vertical, as in the diagram, the pulse produced
in each cycle is exactly one-half as long as the cycle itself;
