METHOD OF TESTING A RECORDING MEDIUM, AND A DEVICE FOR CARRYING OUT THE METHOD

摘要

In the method disclosed, an erasable-recording medium (1) with recorded data which must be retained is passed in the direction of motion through a test-signal read-out device (R2), a first erasing device (E1), a test-signal recording device (W1), a test-signal read-out device (R1), a second erase device (E2) and a recording device (W2) for the data read off by the test-signal read-out device (R2). The test signal is generated and tested in a device (6) which also controls a signal-processing and control device (8) located in the path (7) of the signals.