Institute for Telecommunication Sciences
the research laboratory of the National Telecommunications and Information Administration

NTIA Technical Report CR-91-43
Effective Erasure of Magnetic Tapes : 2. Criteria and Models Toward an Effective "Standard"

October 1991


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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Institute for Telecommunication Sciences
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Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

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