PROCESS FOR EVALUATING BINARY DATA OF A MAGNETIC STORAGE CARD

摘要

In a process for evaluating binary data stored on the magnetic track of a magnetic storage card (10) in the form of flux changes in accordance with the two-frequency code, a relative movement (v) is produced between the magnetic storage card (10) and an electromagnetic transformer (30) which emits voltage pulses induced by the changes in magnetic flux. The time intervals between the voltage pulses are evaluated in order to obtain the data. To this end, stadardization is carried out with uniform preliminary data at the beginning of a scanning operation. The output signal (U) of the electromagnetic transformer (30) is converted to digital values at predetermined times. The digital values are stored in the sequence in which they are stored and evaluated in order to obtain the data.