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File scanner with files as units and personnel
File scanner with files as units and personnel
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机译:文件扫描仪,以文件为单位和人员
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摘要
A record carrier (1) is described which has a servo track (4) indicating an information track (9) intended for recording information blocks. The servo track (4) has a periodic variation of a physical parameter at a predetermined frequency, usually called wobble. the servo track has modulated parts for encoding position information according to a predetermined type of modulation. The record carrier comprises a management area in which the servo track comprises permanent data. The permanent data is encoded using a different type of modulation, but using the variations of the same physical parameter. Direct digital modulation (41) is proposed for the different type of modulation. Further a device for reading and/or writing the record carrier is described.
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