| 摘要 |
<p>PURPOSE:To measure the signal level of the reproduction output, by supplying the change of magnetization of the servo track to the counting means and then converting the count value into the output level value through a converting circuit for display. CONSTITUTION:The servo track signal recorded to the cartridge tape medium is converted into the electric signal through the reproudction head 201 and then supplied to the counter circuit 205 via the full-wave rectifying circuit 203 and the slicing circuit 204. Then the number of the output signals of the circuit 204 is counted, and the count value is converted into the output level value through the converting circuit 206 to be displayed on the output display circuit 207. Thus the output level value is measured while the servo track is normal, and then record state can be presumed based on the output level value. In this way, the record state of the servo track and the reproduction output level can be known just by adding a simple circuit.</p> |
