Abstract
A procedure for rapidly evaluating the error rate performance of PRML channels is derived. The procedure, Sequenced Amplitude Margin (SAM), is a direct analogy to window margin techniques that are used for evaluating peak detection channels. SAM is computed from amplitude sampling errors, while window margin is a function of peak timing errors. Examples of the use of SAM to optimize filters, evaluate off-track performance, and compare PR4 with E/sup 2/PR4 systems are described.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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