Method of measuring side erase band width with a spinstand has been 'improved using narrow-band overwrite filter read-back track profile, which provides a sharp vertex and two straight side lines. The resultant measurements are in good agreement with those obtained from '747' tests. Effects of the increase of the side erase band width caused from high frequency magnetic recording has been investigated. The impact on the off-track capability due to increase of side erase band width of high frequency magnetic recording is discussed.
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