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现有频分制等远动系统中,按其功率匹配的概念和方式,在信号源功率为定值时,通路输出功率将与通路数目n的平方呈反比的降低。因此,当路数增加时各通路输至传输线上的功率将显著降低。从而构成干扰相对迅速增大,造成通路电平范围迅速降低,严重者将无法传输信息。成为上述远动系统中限制通路数目和传输距离的关键之一,大大降低了远动设备的有效性和可靠性。
In existing remote systems such as frequency division and the like, according to the concept and manner of power matching, when the power of the signal source is a constant value, the output power of the path will decrease inversely proportional to the square of the number of channels n. Therefore, when the number of channels increases, the power input to the transmission line by each channel will be significantly reduced. Which constitutes a relatively rapid increase in interference, resulting in the rapid decline in the level of access levels, in severe cases will not be able to transmit information. Becomes one of the keys to limit the number of paths and the transmission distance in the telecontrol system and greatly reduces the effectiveness and reliability of the telecontrol device.