Head-medium clearance and lateral track registration of a recording head as measured from the readback signal

Author

Klaassen, Klaas B. ; Van Peppen, Jack C L

Author_Institution

IBM Res. Div., Almaden Res. Center, San Jose, CA, USA

Volume

37

Issue

1

fYear

2001

fDate

1/1/2001 12:00:00 AM

Firstpage

575

Lastpage

582

Abstract

Electronic processing of the harmonic content of the readback signal of a magnetic recording device allows the in situ determination of the slider-to-medium mechanical clearance for heads positioned directly over prerecorded tracks and the determination of the lateral displacement variation for heads positioned adjoining to a prerecorded track. In this paper, the theory is derived for such a noninvasive measurement and the required measurement conditions are discussed. The uncertainty in the measurement due to the noise in the readback signal is also presented

Keywords

displacement measurement; harmonic analysis; magnetic heads; measurement uncertainty; signal processing; spatial variables measurement; electronic processing; flying height; harmonic content; head-medium clearance; lateral displacement variation; lateral track registration; measurement conditions; measurement uncertainty; noninvasive measurement; prerecorded tracks; readback signal; recording head; signal noise; slider-to-medium mechanical clearance; track misregistration; Distortion measurement; Frequency measurement; Information analysis; Magnetic analysis; Magnetic heads; Magnetic recording; Magnetization; Measurement techniques; Signal analysis; Signal processing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.914381

Filename

914381