| 摘要 |
PURPOSE:To improve the working environment of an operator as well as the using conditions and operability of a device by providing a transducer to both an operation part and a sound amplifying part respectively, connecting both parts via a transmitting medium and perform the remote control to the sound amplifying part via the operation part. CONSTITUTION:An operation part 1 is connected to a sound amplifying part 2 via a cable 3 serving as a transmitting medium. The outputs of faders F1-Fn and switches SW1-SWm of the part 1 are connected to the input terminal of a control circuit 11. The signals showing operation amounts of F1-Fn and the switching signals of SW1-SWm are coded after the arithmetic processing and sent to a transducer 12. At the part 2 the transmission signal which is adversely converted by a transducer 22 is supplied to a control circuit 21. The circuit 21 decodes the coded and multiplexed signal and controls voltage control amplifiers A1-An and contacts S1-Sm in response to the operations of F1-Fn and SW1-SWm respectively. Thus it is possible to improve the working environment of an operator as well as the using conditions and operability of a device. |
