October 1991 | NTIA Technical Report CR-91-43

Effective Erasure of Magnetic Tapes : 2. Criteria and Models Toward an Effective "Standard"

David Middleton

Abstract: Erasure "standards" employing a saturating field which clips a test sinusoidal so that its 3Qharmonic is 12 dB down from the first harmonic is seen to be incomplete. The probability of (just) detecting the erased signal, under false alarm control, is not

Keywords: magnetic tape; erasure standards; saturating field; erased signal; false alarm control; harmonics; signal duration; deflection criteria; deflection parameter; detection parameter; threshold coherent detection; probabilistic methods; background noise levels

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