Tiptop Z2040 4-Pole VCF - Manual (Page 8)

Self Oscillating:
The Z2040 can be used as a pure Sine wave Voltage
Controlled Oscillator. With no signal on the input and
the Resonance knob at maximum the Z2040 will
oscillate a very low distortion sine wave. Although the
Z2040 does not provide an exponential 1V/Oct input,
the Z2040 will track precisely over about 7 Octaves
using MOTU Volta calibration. Modulating the
VC-Resonance and/or the FM inputs in self oscillation
will transform the sine wave and add harmonics.
Specification:
Resonance / VC-RES:
The Resonance knob sets an offset to the VC-RES.
Input impedance = 10K Ohm
Input range: +/-2.5V*
FM / FM-IN:
The FM knobs attenuates the FM-IN
Input impedance = 220K Ohm
Input Range: +/-2.5V*
(cont. on pg.9)