99.998% Accurate Speed; Phase Controlled by Quartz Oscillation: The rotating speed is highly stabilised by a timing clock based on a quartz crystal oscillation which is very stable against changes of temperature or time.
By the use of Phase-locked loop method, the speed is hardly affected by load or supply voltage fluctuation.
DC Electrical Brake for Smoother Operation: Up-speeding servo function and a DC electrical brake are commanded in accordance with the speed detection data.
The result is smoother operation in speed change-over, in starting or in stopping as well as during play.
Magnetic Recording for Speed Detection: Denon established its original motor control system using magnetic recording method for speed and phase detection.
1000 pulses recorded with a high accuracy allow a high detecting frequency to expel phase lagging of the servo system accordingly over-shoot, wow and flutter therein.
Improved S/N, Wow and Flutter Performance by an AC Motor: With the introduction of pulse width modulation for motor regulation, a cleaner driving current can be applied to the motor.
This improves S/N, wow and flutter performance. This method has also reduced power consumption.
Speeds: 33.33 and 45rpm
Platter: 1.8kg diecast aluminium, 312mm dia
Speed adjustable range: more than +-6%
Wow and flutter: 0.015% WRMS
Signal to noise ratio: 77dB or more
Brake: DC electrical brake
Motor: AC servo motor