| 摘要 |
PURPOSE:To improve the ability of interference detection caused by the same frequencies, by stopping a desired wave while no voice signal exists, and detecting the level and a clock signal of the interference wave. CONSTITUTION:A signal is transmitted from a transmitter while the voice signal exists. On the other hand, a signal separator 15 of a receiver obtains an end code and a radio equipment discriminating signal and transmits them to an interference discriminator 18. The discriminator 18 starts the monitor of the presence/absence of the clock signal from a clock signal pickup device 14 and the state of level from a level detector 13 with the code and signal. If interference of the same frequency takes place, even if there is not desired wave due to the interruption of voice, the level is detected at the level detector 13, the interference wave of the same frequency is demodulated, and since the clock signal only is detected from the clock signal pickup device 14, the discriminator 18 discriminates that there is an interference. |
