SW921 OSCILLATOR

SW921 OSCILLATOR VCO

SW921 OSCILLATOR
FUNCTION DESCRIPTION 
The SW921 Voltage Controlled Oscillator is a variable waveform generator which produces frequencies ranging from 0,01 to 40.000 Hz. Four waveforms are available: sine, triangular, sawtooth and rectangular with variable duty cycle. Both fixed and variable levels can be obtained from front panel output jacks.Voltage controlled
rectangular width is set by a knob and with accompanying voltage input jacks. Clamping point (waveform reset control) may be set by a knob and accompanying trigger inputs. Multiple frequency control inputs can be plugged into this module in parallel. This module functions as both an audio or control voltage generator.

MUSICAL APPLICATION 
Besides the basic musical applications of a Voltage Controlled Oscillator the SW921 offers voltage controlled rectangular width which will vary the harmonic structure of the rectangular waveform and provide constant timbre changes within the oscillator, when controlled with a low frequency control voltage from another oscillator. An interesting phase cancellation effect is created when a voltage controlled rectangular waveform is added to the sawtooth waveform from the same oscillator.
This Module is based on the original design from 1974.

TECHNICAL SPECIFICATION 
Characteristic:
1V/Octave
Impedance:
100k ohm
Number of control inputs:
3
Waveforms:
sinewave / sawtooth / rectangular / triangular available simultaneously
Impedance of fixed level outputs:
800 ohm, except rectangular 50 ohm
Level of outputs:
approx. 0,6 V RMS
Level of auxiliary outputs:
approx. 2,5V RMS
Power requirements:
+/-15 Volt at at +/- 50 mA

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