Recording/reproducing apparatus and method that can record/reproduce a signal properly, and to correct phase difference between control/driving signals to appropriate laser of magnetic drive circuit

Abstract

Various conditions such as the power of a pulse beam for recording emitted from an optical head to a magneto-optical recording medium, the power of continuous light in reproduction, the intensity of the magnetic field applied from a magnetic head, the phase difference between the magnetic field applied from the magnetic head and the pulse beam emitted from the optical head, and the equalizer coefficient of an equalizer are optimized based on the error rate of a reproduced signal by actually recording a signal to a magneto-optical recording medium and reproducing the recorded signal. A signal is recorded and/or reproduced to/from a magneto-optical recording medium according to the optimized conditions. A control circuit provides control of a servo circuit, an equalizer, a laser drive circuit and a magnetic head drive circuit. As a result, the phase difference between a pulse beam and a magnetic field, the intensity of a pulse beam, and intensity of a magnetic field in recording a signal, and also the intensity of a laser beam and the coefficient of an equalizer to remove waveform interference in reproducing a signal are optimized to carry out recording and/or reproduction of a signal correctly to and/or from a magneto-optical recording medium according to the optimized result.