| 摘要 |
PURPOSE:To improve transmission quality by sending out additional information at a transmission side not only at the start of signal transmission, but also at the end, and selecting information of higher signal quality at a reception side. CONSTITUTION:A transmitter 8 transmits the information of a synthesizing circuit 7 by radio according to a command from a microcomputer 6. The computer 6 turns on the transmitter 8 when a press switch 3 is turned on to synthesize and transfer character information inputted previously with an input button 4 and the frame synchronizing signal of a frame synchronizing signal of a frame period pattern generator 5 to the circuit 7, and also retransfers the composite value of the character information of the button 4 and the frame synchronizing signal of the generator 5 even when the switch 3 is turned off. A reception-side microcomputer 15, on the other hand, reads digital information from the output of a receiver 9 to know the position of the character information when a frame synchronizing signal detecting circuit 14 makes a response, reads the current electric field information from the output of a converter 13, and compares the electric field information at the start of signal transmission with that at the end to output character information of higher quality to a display device 16. |
