| 摘要 |
PURPOSE:To provide a function equivalent to that for communication of continuous signals even in case of burst communication where reception signals are discontinuous, by connecting a false reception signal, which is selected preliminarily in accordance with detection information indicating that the reception FSK modulated signal of a detector is absence, to the detector. CONSTITUTION:A detector 25 which detects whether reception frequency informa tion exists or not is connected to a receiving part 24, and reception frequency information is inputted to a detector 27 through a switch 26 which switches the connection destination in accordance with this detection information. The switch 26 is connected as shown by a solid line in the figure by control informa tion on 'presence' of reception frequency information on the detector 25 and is connected as shown by a broken line in the figure by control information on 'absence' of reception frequency information. By this constitution, frequency information is inputted to the detector 27 in a section where frequency informa tion which has the transmission loss compensated exists. Meanwhile, the signal form a false frequency information generator 28 is inputted to the detector in a section where frequency information does not exist. |
