一、噪声测量中的噪声源和仪器的误差一般在噪声测量中,使用两种状态的噪声源,并在测量装置(图1)的输出端上记录噪声功率电平 P_1和 P_2。如果 T_1和 T_2为对应于这两种状态的噪声源温度,而 T_n 为测试中装置或者系统的噪声 I. Noise Sources and Equipment Errors in Noise Measurement In general noise measurement uses two states of noise sources and records the noise power levels P_1 and P_2 at the output of the measurement device (Figure 1). If T_1 and T_2 are noise source temperatures corresponding to these two states and T_n is the noise of the device or system under test