Accession Number : AD0679508

Title :   RELIABILITY OF MAGNETIC TAPE MEMORIES,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Kilna,A. A.

Report Date : 04 APR 1968

Pagination or Media Count : 15

Abstract : By lumping together noise associated with magnetic tape quality, inherent noise of signal processing circuits, and noise caused by mechanical sources such as flutter and tape-head channel crosstalk, the author expresses the reliability of digital tape readers as a function of probabilities of misreading 0 and 1. Assuming that noise follows a normal distribution pattern, the author shows that the probability of tape reader failure is a function of discriminator-threshold-level discerning between 0 and 1, and that this probability has a minimum and maximum value. A probability of failure for reading a random code is derived. These results are used to evaluate the reliability of the BESM-2M computer tape memory system. A method for finding the actual distribution of signal and noise amplitudes in this system is presented.

Descriptors :   (*DATA STORAGE SYSTEMS, MAGNETIC TAPE), (*MAGNETIC TAPE, RELIABILITY), STATISTICAL DISTRIBUTIONS, FAILURE(ELECTRONICS), DISCRIMINATORS, USSR

Subject Categories : Computer Hardware
      Recording and Playback Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE