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2004年元旦前,佛山市顺安达运输有限公司450MHz超短波电台双频同时受到不明电台信号的强烈干扰,严重影响出租车辆的调度指挥。为保障春节交通运输安全,我监测站立即组织所有技术人员对投诉频率进行监听监测。 首先我们在佛山市固定站对不明干扰信号进行监听监测,发现低频受超短波电台信号干扰,方向东偏南约25°(大约115°方向),高频受无线接入信号干
Before New Year’s Day in 2004, Foshan Shun Anda Transport Co., Ltd. 450MHz ultra-shortwave radio dual-band at the same time by unknown radio signals, a strong interference, seriously affecting the dispatching command of the taxi vehicles. To ensure traffic safety during the Spring Festival, our monitoring station immediately organized all technical staff to monitor the frequency of complaints. Firstly, we monitored and monitored the unidentified interference signal at the fixed station in Foshan City. We found that the low frequency was interfered by the UHF radio signal in the direction of east about 25 ° south (about 115 ° direction) and the high frequency was affected by the radio access signal