| 摘要 |
PURPOSE:To monitor the state of a device to be monitored at a monitoring device without wiring any cable at a distant place. CONSTITUTION:A transmission part 2 provided on the side of a serial transmission unit 1 transmits data on the transmission line of the serial transmission unit 1 with a radio signal composed of radio waves. A monitoring device 3 receives the radio signal from the transmission part 2 through an antenna 7 at a reception part 4 and under the control of a display control part 6, the received data are displayed by a display device 5. |
