| 摘要 |
PURPOSE:To realize a variable adjustment on the basis of a value adjusted through manual operation by providing a method of equalizing adjustment values of a manual adjustment system and remote adjustment system, when alternating between both systems automatically. CONSTITUTION:Once knob 1 is touched, the detection signal of touch sensor 3 switches switch circuit 11. Turning knob 1 in this state adjusts an input signal from terminal 10 and then outputs it from output terminal 14. An adjusted value in this case is held in latch memory 9 to set electronic volume 12 by changing so that its content will be equal to the adjusted value. Next, remote operation changes switch 11 over and at the same time, the output of an external conrol signal generating circuit is supplied to electronic volume 12 by way of memory 9. As a result, the input signal can be adjusted by varying from the value on the basis of the adjusted value of knob 1. |
