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接收机的灵敏度是指接收机的输出端维持一定的信噪比并保持一定的输出功率在天线上所需感应的输入信号电压.这是衡量接收机质量的一个重要技术指标. 随着收信机使用时间的增加,元器件的老化、变质、灵敏度会随之下降,严重地影响通信的效果.影响接收机灵敏度的原因是多方面的,在检修机器时,要根据具体情况进行分析,逐级检查.一般来说,电子管或晶体管老化或变质,使整机灵敏度下降,其中中放、高放和变频级影响较大.特别是在维修
Receiver sensitivity refers to the output of the receiver to maintain a certain signal to noise ratio and maintain a certain output power at the antenna required to sense the input signal voltage.This is a measure of the quality of the receiver is an important technical indicators.With the receiving The use of time machine increases, the aging of components, deterioration, the sensitivity will decline, seriously affecting the communication effect.The reasons for the sensitivity of the receiver are many, in the maintenance of the machine, according to the specific circumstances of the analysis, by In general, the tube or transistor aging or deterioration, so that the sensitivity of the whole machine, which put, put and frequency level greater impact, especially in the maintenance