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(1)绪言本文叙述的 DT—2401A 型调制解调装置,是用音频通道做为传输数据来设计的。从1970年8月开始在东京(日本)——雷特兰岛(美国)及东京——中国香港之间,作为2400毕特/秒速率的数传通道来使用的。本文叙述了此装置的设计要点,工作原理以及试验结果,对装置的说明及其应用情况也结合进行介绍,这里先简单说明一下数据传输速度与调制方式的特点。用音频段长距离通道作为数据传输时,多数采用数据信号来调制单一载波的传输方
(1) Introduction This article describes the DT-2401A modem device, the audio channel is used as the transmission data to design. Starting in August 1970 in Tokyo (Japan) - Redland (United States) and Tokyo - Hong Kong, China, it was used as a 2400 baud / second data rate channel. This article describes the design of the device, the working principle and the test results, the device description and its application are also described in conjunction with a brief description of the characteristics of the data transmission speed and modulation. With the audio segment long-distance channel as the data transmission, the majority of data signals to modulate a single carrier transmission side