Title :
A generalized frequency domain nonlinearity measurement method
Author :
Che, Xiaodong ; Peek, Michael J. ; Fitzpatrick, James
Author_Institution :
Quantum Corp., Milpitas, CA, USA
fDate :
11/1/1994 12:00:00 AM
Abstract :
In this paper, we discuss an accurate and effective nonlinearity measurement method that is generalized from the frequency domain method proposed by Y.S. Tang and C. Tsang(1991). The new method discussed here offers the following features. It can test any recording density by observing only one fixed frequency. This method can be used to study nonlinearities due to interactions between two transition groups such as a tribit interacting with a single transition. By following a general rule given in this paper, one can construct a recording pattern that simultaneously satisfies code constraints and allows the measurement of nonlinearities. Therefore, it allows a nonlinearity measurement on a HDA
Keywords :
frequency-domain analysis; hard discs; partial response channels; PRML system; code constraints; fixed frequency; frequency domain nonlinearity measurement; hard disks; recording density; recording pattern; transition groups; tribit; Degradation; Detectors; Distortion measurement; Frequency domain analysis; Frequency measurement; Maximum likelihood detection; Modulation coding; Nonlinear distortion; Testing; Writing;
Journal_Title :
Magnetics, IEEE Transactions on
