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现代侦收和窃听技术的发展取得了明显的进步,真可谓今非昔比。就波束很窄方向性很强的微波线路来说,其电波散射很少,要从远处侦收是比较困难的。但是如果能在电波传播的路径上架设天线,还是能够侦收到的。然而即使侦收成功,能够获得通信内容,以后的处理也是复杂的,需要很大的工作量。微波当中,电话信号、电视的图像和伴音信号、电传信号等多种电波混然一体,就算能把大量的电波信号搞到手,也必须用特殊的电子计算机进行分类,选出所需信号加以判决和破译。
The development of modern reconnaissance and eavesdropping technology has made remarkable progress. In the case of microwave lines with very narrow beam direction and very narrow directivity, the scattering of radio waves is very small and it is more difficult to detect them from a distance. But if you can set up the antenna in the path of radio waves, or can detect it. However, even if the reconnaissance is successful and the communication content can be obtained, the subsequent processing is complicated and requires a lot of workload. Among the microwaves, a variety of radio waves such as telephone signals, television pictures, audio signals and telex signals are mixed together. Even if a large number of radio signals can be obtained, special electronic computers must be used to classify the signals and select the desired signals Judgment and deciphering.