Modulation Noise Neighbored On Carrier And Medium/Head Spacing on Sinusoidal Reproducing Process of Magnetic Recording Channel

Abstract

A spacing from a medium to a head is one of the most important parameter on the magnetic recording channel in order to increase the recording density;. We think that the spacing might be measured by the accurate measurement of the modulation noise neighbored on carrier caused by spacing fluctuation. As a result of the investigation, the modulation noise is given from the reproducing theory considered the spacing fluctuation, and the spacing can be calculated from the reproduced signals. Measuring the spacing in several tape head systems, we show the relationship between the spacing and the Rrms of tape, and the relationship between the playback envelopes and the spacing.