| 摘要 |
PROBLEM TO BE SOLVED: To provide a jitter measuring device of an optical disk reproducing signal, capable of preventing the influence of the level reduction or omission of the reproducing signal of a track jump spot, or the fluctuation of a tracking servo when the same track is repeatedly played. SOLUTION: This device includes a track jump position pulse generation means for generating a pulse indicating a track jump position from a tracking error signal or a reproduced RF signal detected by an optical pickup, a delay pulse generation means for generating a delay pulse whose time internal is controlled based on the generated track jump position pulse so that time until the arrival of a next track jump position pulse is always constant, and a mask pulse generation means for generating a mask pulse set to a predetermined time interval based on the generated delay pulse. By using this mask pulse, the predetermined section of jitters measured based on reproducing digital data is suppressed. COPYRIGHT: (C)2007,JPO&INPIT
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