As the Neutron is a self oscillating synthesizer, there is no VCO calibration. However, if you believe the unit may be out of tune it can be useful to enable this mode. By bypassing the tune pots you are ensuring the oscillator tuning is not affected by any tune pot. This can also be useful if you want to ensure the oscillators are in tune with each other exactly.

To enable this mode press and hold OSC (1 or 2) RANGE and PARAPHONIC buttons until the selected OSC octave LED starts to flash.  Press and hold OSC RANGE and PARAPHONIC buttons again to leave this mode.