EXPERIMENTAL PERFORMANCE COMPARISON OF FDTS DF DETECTORS - 8/9(0,K) VS. 4/5-MTR CODES/

The performance of an FDTS/DF detector is compared using two different RLL coding techniques. The new Maximum Transition Run (MTR) codes hav e been proposed for use with FDTS/DF detectors because of demonstrated coding gains. This work compares the performance of an 8/9 (0,4/4) co de to a 4/5 MTR code using actual MR head signals captured from a spin stand. The coding gain is evaluated in the presence of real write proc ess non-linearity that exists at high linear densities. The error rate performance is compared at User Bit Densities (UBD) ranging from 2.2 to 2.9. A technique similar to Sequenced Amplitude Margin is used to a ssess error rate performance for the FDTS/DF detector. Final results a re also compared to PR4 and RAM-DFE detectors.