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Flexible Disk Inspection Tool Disclosure Number: IPCOM000069247D
Original Publication Date: 1978-Apr-01
Included in the Prior Art Database: 2005-Feb-20

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Hatchett, MR Holloway, JF [+details]


Defects in the recording surface of a flexible recording disk are mapped by a Surface Analysis Tester. This device steps across a recording disk track-by-track writing continuous pulses at a high bit density along each track. Pulses written along a track during one revolution are read back by the tester, and the amplitudes of the resulting read pulses are compared with a preselected threshold level.