Title :
Magnetic characterization using elements of a PRML channel
Author :
Coker, Jonathan D. ; Galbraith, Richard I. ; Kerwin, Gregory J.
Author_Institution :
IBM Storage Syst. Products Div., Rochester, MN, USA
fDate :
11/1/1991 12:00:00 AM
Abstract :
The authors examine several magnetic characterization techniques which are easily implemented using elements of a partial-response maximum-likelihood (PRML) channel. These techniques are applicable over a broad range of topics. The use of the PRML digital samples with specialized data patterns to detect defective media sites is discussed. A sensitive and calibrated method for measuring fly height variations is outlined. A statistical measurement scheme that provides a figure of merit for magnetic performance is discussed
Keywords :
calibration; height measurement; magnetic disc storage; PRML channel; data patterns; defective media sites; digital samples; fly height variations; magnetic characterization techniques; partial-response maximum-likelihood; statistical measurement scheme; Electronic equipment testing; Error analysis; Estimation error; Hardware; Logic testing; Maximum likelihood detection; Maximum likelihood estimation; Performance analysis; Sampling methods; Viterbi algorithm;
Journal_Title :
Magnetics, IEEE Transactions on
