A general solution of write equalization for digital magnetic tape recording

A general solution of digital recursive filters which produce two-level output is given. To give a rough idea of the performance of write equalizers, a high-density recording channel corrupted by additive noise is appraised, and the signal-to-noise ratio with and without a write equalizer is compared. Calculations show that a small gain can be expected in using some of the write equalizers. The linearity of the channel was tested using some of the write equalizers.