The Synthesis Technology E300 Ultra VCO is an analog oscillator based on the MOTM-300 5U module, with an updated design engineered in collaboration with Dave Rossum of Rossum Electro-Music.
The E300 uses modern temperature-controlled exponential converters without the expensive MAT-02EH + Tempco found in the MOTM-300. It also incorporates variable HFT (High Frequency Tracking) for a wider, more accurate 1V/Oct input. The SYNC circuit is a simpler hard sync type, with accurate detection of any waveshape/frequency used. There is an added -1OCT/-2OCT sub-octave squarewave output, which is phase-aligned with the sawtooth.
The VCO core is a new sawtooth-based circuit with improved linearity and a unique saw-to-triangle converter with no glitch in the transition peaks.
Just like the MOTM-300, the E300 is designed to be the best tracking analog VCO available (over 10 octaves) with the lowest temperature drift (typically less than 0.1Hz over a 24hr period).
||16-pin Eurorack (55 mA from +12V, 40 mA from -12V)
||10Vpp (-5V to +5V)
||10Vpp nominal +-0.35V
||15Hz to 19KHz (no CV input)
||Sets the initial VCO pitch with no CV applied
||Modifies the width of the PULSE output
||Attenuators for the FM inputs. FM 1 can be switched between EXP (exponential) and LIN (linear) FM. FM2 is linear.
||Controls whether the sub-oscillator output is 1 or 2 octaves below the initial oscillator frequency.
INPUTS AND OUTPUTS
||1 volt per octave control for the initial VCO pitch
||VCO frequency modulation input with attenuator Can be switched between EXP (exponential) and LIN (linear) FM using the toggle switch.
||VCO frequency modulation input, exponential FM, with attenuator.
||Reset VCO frequency when input signal exceeds +1.7V
||PULSE width modification input, with attenuator.
|SINE, TRI, SAW, PULSE
||The primary outputs of the oscillator
||The sub-oscillator output. Can be switched between 1 or 2 octaves below the initial oscillator frequency.