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一、概述参考资料(1)中介绍了在同一个磁盘浮动头系统上,用峰值位移严重的数据编码图象进行记录和读出来比较以下三种记录方式的密度上限和不同记录密度下的相位储备:(1)改进的不归零制(MNRZI);(2)调频制(FM);(3)改进的调频制(MFM)。其密度上限分别为:200,135,185位/毫米。实验结果表明,这三种记录方式的优劣顺序是:MNRZI,MFM,FM。其中 MNRZI也就是成组编码(GCR)。1973年11月研
I. INTRODUCTION Reference (1) describes the recording and reading of a data-encoded image with severe peak displacement on the same disk floating head system to compare the upper and lower limits of recording density and phase at different recording densities Reserve: (1) Improved non-return to zero system (MNRZI); (2) FM; (3) MFM. The upper limit of their density: 200,135,185 / mm. The experimental results show that the advantages and disadvantages of these three recording methods are: MNRZI, MFM, FM. MNRZI which is the group code (GCR). November 1973 research