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文章介绍了一种利用广播线这种模拟信道传输数字信号的调制解调器，通过实际使用，证明此调制解调器性能优良，设计简单，成本低廉。
This paper introduces a modem that uses a broadcast line as an analog channel to transmit digital signals. The actual use of this modem proves that this modem has excellent performance, simple design and low cost.