Accession Number:
AD0679508
Title:
RELIABILITY OF MAGNETIC TAPE MEMORIES,
Descriptive Note:
Corporate Author:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
Personal Author(s):
Report Date:
1968-04-04
Pagination or Media Count:
15.0
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:
Subject Categories:
- Computer Hardware
- Recording and Playback Devices