| 摘要 |
PURPOSE:To analyze the surface of entire track, by recording a small record on a region up to a pseudo index signal corresponding to a specific number and extending the recording area. CONSTITUTION:The 1st format is generated by the decoding of a sequence generating circuit and recordings HA, R0 and R1 base on the format and a pseudo index V corresponding to the specified byte number is recorded. The recordings HA, R0 and R1 are read out and the track surface analysis can be made via deciding circuit. When the 2nd format is selected and the small records HA, R0 and R1- are recorded similarly, each recording requires a gap and the index V becomes the outside line of the storage area of the preceeding index and the recording area can substantially be extended. Thus, when similar repetition is made, the analysis of the surface of the entire track can be performed. |
