| 摘要 |
PURPOSE:To perform signal transmission where a display message and a non- display control signal are mixed by detecting prescribed first and second characters in a reception message and preventing a message between both characters from being displayed on a segment display part as a control signal. CONSTITUTION:It is assumed that the signal string of a reception signal string d1 is inputted. In the signal string d1, first and second character signals s1 and s2 representing the start and the end of a receiver control instruction are included. In a message reception control means, a first character detecting signal r1 is outputted at the time of detecting the signal s1 by a comparison means 203. Since an FF301 is reset by the signal r1, hereafter, a selection signal S is set at a nono-selective level, and as a result, a switch 306 is disconnected, which blocks the passage of the character string d1. After that, a second character detecting signal r2 is outputted at the time of detecting the signal s2 by a comparison means 304, and the signal r2 passes a delay circuit 302, and is changed to a delay signal r3 of one character time, and is inputted to the FF301, then, resets the FF. After that, the signal S is set at a selective state, and the switch 306 is connected, and a reception character signal d2 is outputted. |
