FIELD: optical data carriers.
SUBSTANCE: invention is related to optical disk, preformed on which is a spiral track with swaying in form of groove and/or area, along which recording of data is performed. Groove is made with swaying in form of series of predetermined modules of signal, each one of which consists of part of bit of frequency shift keying information, based on shape of signal received as a result of frequency shift keying modulation of information bit and part of single frequency, based on shape of signal of single frequency. In frequency shift keying modulation two varying frequencies are used, first one of which matches single frequency and second one is different from single frequency. These various frequencies are selected in a ratio so that each one of them composes even number of sways and odd number of sways in turns during a predetermined cycle.
EFFECT: accelerated synchronization and stable operation of disk drive.
3 cl, 27 dwg
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