Error event analysis of EPR4 and ME/sup 2/PR4 channels: captured head signals versus Lorentzian signal models

Spin-stand error event analysis is conducted for EPR/sup 4/ and modified E/sup 2/PR4 (ME/sup 2/PR4) channels. The error event distributions for 16/17 random code and 16/17 QMTR code at user bit densities (UBD) of 2.5, 3.0 and 3.5 were investigated. Captured spin-stand waveforms were processed through a software channel and the error events were analyzed. The distribution of error events for spin-stand data is compared to the conventional Lorentzian model for 100% AWGN noise colored by the equalizer and for the 100% jitter noise case. Results show that neither Lorentzian model accurately predicts the spin-stand results by themselves or as a mix; however by considering the two extreme models, all the major error events are accounted for.