DYNAMIC AMPLITUDE CONTROL FOR MAGNETIC TAPE SYSTEMS

摘要

A magnetic tape system in which read heads sense signal fluctuations in the tracks in a moving magnetic tape includes dynamic amplitude control. The signals from a plurality of tracks are averaged and compared to predetermined levels. A digital counter is set in accordance with the level of the average signal. The digital counter changes the gain of the signal produced by the magnetic head. Gain changes are made only upon the occurrence of the end of the record being read.