High speed magnetic tape inspection equipment.

摘要: A method and apparatus for automatic high speed inspection of information recorded on magnetic video tape (30) to determine if the original recording has been altered by erasure or overrecording added in a previously unrecorded portion tape. To facilitate inspection, low frequency signal is audio track at time made. Inspection consists sensing tape's control containing while rewinding speed. During rewind, sensor (32) positioned backside non-oxide coated surface receives signals from both track. The detected are processed fault detection circuit (22) where they analyzed speed, pulse amplitude, pattern, pattern. without defects indicated simultaneous absence presence signal. Appearance either alone defect its location stored computer (24). At end (24) prints out (26) number, type(s) location(s) defect(s).