| 摘要 |
PURPOSE:To obtain an easy-to-see screen by repeating automatically both quick traversing and reproduction modes in a fixed time interval in a fast forward/ reproduction mode. CONSTITUTION:A right or left key of a keyboard switch 21 is pushed to deliver a digital signal corresponding to the target value from a command device 18. This digital signal is converted into the voltage by a D/A converter 17. In this case, the target voltage is changed every fixed time, and therefore the stepped target voltage is delivered. In a reproduction mode the signal is read out of a disk 1 by a pickup device 3, and the information is extracted through a demodulating circuit 20. Then the address information showing the position in the radius direction where the device 3 exists is extracted out of the information delivered from the circuit 20 by an address reading circuit 19. |
