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山西省长治市中国银行从1992年组建400MHz超短波无线电选呼通信网以来,一直使用正常,工作良好。然而,从今年6月份以后,却不断受到不明电台信号的干扰,无法进行正常通信,使本网处于半瘫痪状态。根据中行的申诉和请求,市无委办一方面到实地了解干扰情况,另一方面利用现有的设备进行监测监听。通过连续几天的监测监听并进行认真的分析研究,总结出干扰的4个特点: 第一,干扰具有时间规律。每天中午11:50～15:00点,晚18:30～24:00左右。第二,在上述两段时间内,只要移动台发出选呼
Since its establishment in 1992, the Bank of China, Changzhi City, Shanxi Province, has been using the 400MHz UHF radio selective calling communication network and has been working well. However, since June this year, it has continuously been disturbed by unidentified radio signals and can not conduct normal communications, leaving Ben Wang a semi-paralyzed state. According to the complaints and requests of the Bank of China, the municipal government did not conduct on-the-spot investigation of the interference on the one hand, and on the other hand used the existing equipment for monitoring and monitoring. Through several days of monitoring and careful monitoring and analysis, summarizes the four characteristics of the interference: First, the interference has a time rule. Every day from 11: 50 ~ 15: 00, evening 18: 30 ~ 24: 00 or so. Second, as long as the mobile station sends a selective call within the above two periods of time