Track mispositioning considerations in high density disk recording

In today´s most advanced disk systems, of all the factors which contribute time shifts of the data pulses that impinge on the decodable window margin required for reliable signal detection-peak shifts of the pulses due to demagnetization effects, timing dislocations due to media and system noise, and track positioning errors resulting in timing distortions from adjacent tracks or from incomplete erasure of the previously recorded information-the latter perhaps represents the major source of timing errors. In this study we used the Dynamic Iterative Model to obtain signal waveforms which were then superposed to determine track interaction effects and assess the implications, particularly for the case of high resolution systems and where high frequency unwanted signals are injected into a low frequency data track.