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法国CIL-Alcatel公司制造了两种用于基带传输的收发讯机,一为ERBdB16/11型,一为ERBdB16/22型.数码率为3,4-19、2干比特/秒,基带传输意味着不必进行频率转换,即便在二进制传输时,也不要求调制-解调过程.只需对数字信号进行编码和放大.可靠的传输速度和距离,取决于导线的直经,例如、ERBbB16/11型,在直经为○、4mm导线上传输,速率为19.2千比特/秒时,传送距离则超过5、5公里.当导线直经为1 mm时,距离可达21公里.这种设备
CIL-Alcatel, France, manufactures two transceivers for baseband transmission, one of type ERBdB16 / 11 and the other of type ERBdB16 / 22. The digital rate is 3,4-19,2 bits per second, and baseband transmission means It does not require modulation-demodulation even in binary transmission. It only needs to encode and amplify the digital signal. Reliable transmission speed and distance depend on the straight-through of the wire, for example, ERBbB16 / 11 With a transmission distance of more than 5,5 km at a transmission speed of 19.2 kbit / s on straight o, 4mm wires and a distance of up to 21 km when the wire is straight at 1 mm.