Title :
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
fDate :
1/1/2001 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
