BS 7023-3 is the third part of the multiple series that specifies the quality of recorded signals, the track layout, and a track format to be used on 130 mm (5.25 in) flexible disk cartridges intended for data interchange between data processing systems.
Note: Numeric values in the SI and/or Imperial measurement system in BS 7023-3 may have been rounded off and therefore are consistent with, but not exactly equal to, each other. Either system may be used, but the two should be neither intermixed nor reconverted. The original design of BS 7023-3 was made using SI units.
BS 7023-3 on construction and use for track format B are useful for:
BS 7023-3 specifies track B i.e., the mode of recording that is Modified Frequency Modulation (MFM) for which the conditions are a flux transition shall be written at the centre of each bit cell containing a ONE and a flux transition shall be written at each cell boundary between consecutive bit cells containing ZEROs.
BS 7023-3 specifies the characteristics of 130 mm (5.25 in) flexible disk cartridges recorded at 7 958 ftprad, on 80 tracks on each side, using modified frequency modulation (MFM) recording. BS 7023-3 provides full data interchange between data processing systems. BS 7023-3 specifies the characteristics necessary for successful data interchange using flexible disk cartridges.
Overall, BS 7023-3 provides the information for construction and uses 130 mm (5.25 in) flexible disk cartridges for data interchange to guide you to writing complete specifications for the manufacture, purchasing and/or testing.
ISO 8378-3:1986