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YTD——JSY型音频通道装置是与我厂生产的JSY型简易数字远动装置配套使用的。采用两点式键控调频方式,把远动终端机发送的二进制数据信号调制为8KHZ±120HZ的信号,经单边带调幅后在有线线路(二线或四线电缆及架空明线)或载波电路上传输。在接收端经解调将接收音频信号还原成二进制数据信号。
YTD - JSY audio channel device is manufactured with our plant JSY simple digital remote device supporting the use of. The use of two-point keying FM mode, the remote terminal to send the binary data signal modulated to 8KHZ ± 120HZ signal by the single sideband amplitude modulation in the wired line (two or four cable and overhead open line) or carrier circuit transmission. Demodulated at the receiving end to restore the received audio signal to a binary data signal.