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这篇試驗报告的内容分三部分:1.电传机內在畸变的校正,2.双音調通信,3.調幅制載波电报改裝为移頻制。我国目前使用的电报設备中,电传机和調幅制載波电报机占很大的比重,这两項設备工作性能的优劣和电报通信的質量有密切的关系。存在的間題是:1.电傳机依照說明書的规定和凭工作人員的经驗不易調整到理想的狀况;2.調幅制載波电报設备不能耐受电平的突然波动,如果电传机調整得不够理想,以及通信时电平发生突然的变动,就会产生变字,在通信中造成技术性的差错,降低了电报的質量。这里第一部分敘述一个計算电传机内在畸变的方法,从計算出的各項內在畸变的数值,可以迅速地將电传机調整到比較理想的狀况;第二部分是講將两个調幅通信路作为一路使用,以提高对于电平突然波动的耐受能力;第三部分是关于直接將一个調幅通信路改裝为移頻制,既可得移頻制能耐受电平突然波动的优点,又可不致浪費使用通信路,一个通信路仍可进行一路通信。一、引言二、电传机內在畸变的校正三、双音調通信四、調幅制載波电报改裝为移頻制
The contents of this test report is divided into three parts: 1. The correction of the inherent distortion of the transmitter, 2. Dual tone communication, 3. Amplitude modulated carrier telegraph converted to frequency shift system. Among the telegraph equipment currently used in our country, telegraphy and AM carrier telegraphy account for a large proportion, and the pros and cons of the performance of these two devices are closely related to the quality of telegraph communications. The problems are: 1. Fax machine in accordance with the provisions of the manual and with the staff’s experience is not easy to adjust to the ideal situation; 2. AM carrier wave telegraph equipment can not tolerate sudden fluctuations in level, if the telex machine If the adjustment is not satisfactory and sudden changes occur in the level of communication, words will be produced, causing technical errors in communications and reducing the quality of the telegraphy. The first part describes a method of calculating the inherent distortion of a transmitter. From the calculated values of the intrinsic distortions, the transmitter can be quickly adjusted to a more ideal condition. The second part is to talk about two AM receivers Road as a way to improve the ability to withstand sudden fluctuations in level; the third part is about the direct conversion of an AM communication system for frequency shift system, both the frequency shift can withstand the sudden fluctuations in the advantages of the system, But also not waste communication channel, a communication channel can still be all the way to communication. First, the introduction of two, the inherent distortion of the fax machine three, three-tone communication four, AM carrier wave telegraph conversion for the frequency shift system