The signal input channel and longdistance data communication are explained at some length.
对信号的输入通道及远程数据通讯等作了较为详细的介绍。
2
Due to satellite communication's long channel, far distance transmission and its wave through troposphere and ionosphere often brings the signal deamplification, noise and wrong code.
由于卫星通信信道长，传输距离远，电波要穿过对流层和电离层，易使信号衰减，引入噪声，造成误码。
3
Video signal in welding fields can be increased the anti-interference ability and transmitted to a longdistance over twisted-pair.