921 3 VCO bank

FUNCTION DESCRIPTION 
The SW921A Oscillator Driver is a control voltage processor which runs associated SW921B oscillators through internally wired connections. The SW921B generates frequencies from 1Hz to 40kHz minimum. This oscillator generates both sub-audio and audio frequencies for control and audio signal use. Fixed level outputs for sine, triangle, sawtooth and rectangular waveforms are available. DC Modulate is a linear frequency control input, AC Modulate input is a capacitor coupled circuit. SW921B Oscillators may be phase locked together via the Synch Input Jack and the associated three position Synch Switch. A sawtooth waveform is recommended for best synchronization results. This Module is based on the original design from 1974.

TECHNICAL SPECIFICATION 

SW921A

Impedance:
100k ohm
Characteristic:
1V/Octave
Impedance:
100k ohm

SW921B

Number of outputs:
4 Sinewave/ Sawtooth/ Rectangular/ Triangular
Impedance of outputs:
1k ohm
Level of outputs:
0,6 V RMS
DC/AC Modulate:
Linear FM / AC Modulate input signal is rolled off below 5 Hz
Synchronisation:
Nominal input level -4 dBm
Mode Switch:
Center position defeats synchronization. Strong position causes oscillator to lock onto harmonic or sub-harmonic signal. Weak position reduces locking strength by a factor of 4.
Power Requirements:
+/-15V at +120mA/- 120mA.

All connected SW921B´s are supplied from SW921A.

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