The top section of the dual-function 285e performs frequency shifting; up and down outputs are simultaneously available. The reference frequency can be externally applied or internally generated; the latter can be voltage-controlled and modulated using FM.
The bottom section is independent, and functions as a balanced modulator of the applied signals. The degree of modulation is voltage-controlled, and the reference frequency can be internally generated or externally applied, as with the frequency shifter. A separate audio output is dedicated to classic ring modulation, a subset of balanced modulation.
All settings of the 285e can be stored and recalled as part of a preset using the 225e or the 206e Preset Manager.
Other modules by Buchla | 206e Mixer / Preset Manager | 207e Mixer / Microphone Preamplifier | 210e Control and Signal Router | 223e Multi-Dimensional Kinesthetic Input / Tactile Input Port | 225e MIDI Decoder / Preset Manager | 227e System Interface | 230e Triple Envelope Tracker / Preamplifier | 250e Arbitrary Function Generator | 251e Quad Sequential Voltage Source | 252e Buchla Polyphonic Rythm Generator | 256e Quad Control Voltage Processor | 266e Source of Uncertainty | 257e Control Voltage Processor | 267e Uncertainty Source / Dual Filter | 261e Complex Waveform Generator | 259e Twisted Waveform Generator | 272e Polyphonic Tuner | 266e Source of Uncertainty | 281e Quad Function Generator | 291e Triple Morphing Filter | 292e Quad Dynamics Manager | 296e Spectral Processor | 297 Infinite Phase Shifter