Measurements of linearity in high density magnetic recording

Author

Regelsberger, M. ; Varner, J.R.

Author_Institution

Eastman Kodak Co., Rochester, NY, USA

Volume

24

Issue

6

fYear

1988

fDate

11/1/1988 12:00:00 AM

Firstpage

2970

Lastpage

2972

Abstract

Wideband signal and noise measurements on various magnetic media are used to explore linear superposition of a magnetic recording channel. Various sources of experimental error are identified that limit the accuracy of the measurement of the isolated transition response (ITR). Quantitative expressions are derived to correct the signal response spectrum calculated from time-averaged ITRs; the errors corrected are caused by jitter due to wideband system noise, modulation noise, and quantization noise. Linear superposition of the tested recording channel is experimentally verified to be valid up to more than 160 KFCI. Since linear superposition implies an ITR independent of bit density, it is concluded that record demagnetization is negligible for high-density, in-contact recording with a 0.2-μm Sendust-tipped head

Keywords

demagnetisation; electric noise measurement; magnetic recording; 0.2 micron; Sendust-tipped head; bit density; high density magnetic recording; isolated transition response; jitter; linear superposition; linearity; magnetic media; magnetic recording channel; modulation noise; noise measurements; quantization noise; record demagnetization; signal response spectrum; wideband system noise; Density measurement; Error correction; Jitter; Linearity; Magnetic noise; Magnetic recording; Noise measurement; Quantization; Testing; Wideband;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92304

Filename

92304