| 摘要 |
PROBLEM TO BE SOLVED: To accurately set up a recording power. SOLUTION: An amplitude detecting circuit 12 detects a peak value of an output signal of PD7 amplified by a head amplifier 9. The peak value detected by the amplitude detecting circuit 12 is read into a drive controller 11, and it is, for example, compared with a suitable target value to binarize the detected signal and adjusts a gain of a variable gain amplifier, and stably binalized in an analog signal processing circuit 10. Determination of a test light power for trial writing in a test track of a magneto-optical disk 2 and operation of an actual recording power in each zone of the magneto-optical disk 2, based on the test light power are executed by the control of the drive controller 11 in a recording power operation circuit 13. A sector for inhibiting the trial writing in the test track is stored in a storage circuit 14. |
