Title :
A 107-kbpi, 16-μm track width recording channel
Author :
Carr, Thomas ; Wachenschwanz, David
Author_Institution :
Eastman Kodak Co., San Diego, CA, USA
fDate :
11/1/1988 12:00:00 AM
Abstract :
A 107-kbpi (4210 bits/mm) data channel was constructed using an 840-Oe-coercivity super-VHS tape and an unshielded magnetoresistive (UMR) head having a track width of 16 μm and was used to explore the practical upper limits of areal storage density in magnetic recording. For a 16-μm track width record head in a system with no guard bands, such as a helical recording system, the areal density would be 170 Mb/in 2. A (1.7) code and compact spectrum write (CSR) equalization were used, and phase margins of 36% were achieved at an error rate of 10 -6. The very high linear density achieved is possible because the UMR head and CSR write equalization procedure a nearly flat noise floor at the detector in a differential channel
Keywords :
magnetic heads; magnetic tape storage; 16 micron; areal storage density; compact spectrum write; data channel; differential channel; flat noise floor; helical recording system; magnetic recording; phase margins; record head; super-VHS tape; track width; unshielded magnetoresistive head; Equalizers; Filters; Frequency; Magnetic heads; Magnetic noise; Magnetic separation; Noise figure; Signal to noise ratio; Transfer functions; Video recording;
Journal_Title :
Magnetics, IEEE Transactions on
