alternating current flowing through the windings of a recording head and generating a magnetic field, the frequency of which is a function of the value of the video signal to be recorded on the magnetic medium Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=806-17-12
alternating current flowing through the windings of a recording head and generating a magnetic field, the frequency of which is a function of the value of the video signal to be recorded on the magnetic medium