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载波通信是铁路长途通信的重要通信手段之一。为进一步提高通信质量和维护效率,对载波机特性采用自动测试的方法是势在必行的。受铁道部电务局的委托,我们于1985年8月开始研制自动测试仪的性能样机。本文首先给出了总体组成方框。进而简述了各硬件部分和软件的基本原理。最后对比人工测试的方法,论述了本仪器的特点:①体积小,造价低廉;②能自动测数、自动数据处理;③有自检功能;④提高了测试精度;⑤仪器具有可扩展性。
Carrier communication is one of the important means of communication for railway long-distance communication. In order to further improve communication quality and maintain efficiency, it is imperative to adopt an automatic test method for carrier characteristics. Commissioned by the Ministry of Railways Electric Affairs Bureau, we began in August 1985 to develop performance prototype automatic test instrument. This article first gives the overall composition of the box. Then the basic principles of each hardware part and software are described briefly. Finally, compared with the manual testing method, the characteristics of the instrument are discussed: ① small size, low cost; ② automatic measurement, automatic data processing; ③ self-test function; ④ improve the test accuracy; ⑤ instrument has scalability.