| 摘要 |
PURPOSE:To accurately detect the deviation of the height of the rotary head by detecting the maximum point of output of the two rotary head and detecting and processing the time difference of the maximum point. CONSTITUTION:The device is provided with a detection circuit 1, A/D conversion circuit, a computer 3, a rotary drum 4, and rotary heads 5, 6, 7, and 8 having the opposite azimuth each other. The output of the reproduction head is numerated by the A/D conversion circuit 2 after the detection of the detection circuit, the time difference at the maximum point of the reproduction head output is obtained by the computer 3 to detect the time difference. The deviation of the height of the rotary heads 5, 6, 7, and 8 is obtained to be displayed on the computer 3. |
