At last, correction method of lowlevelsignal measurement is discussed duo to effect of spectrum analyzer floor noise.
最后，讨论了频谱仪本地噪声对低电平信号测量影响的修正方法。
2
Improving measurement accuracy of lowlevelsignal is studied using RF attenuation, resolution bandwidth, video bandwidth, and video average.
研究了利用频谱仪射频衰减、分辨带宽、视频带宽和视频平均的方法，提高和改善低电平信号的测量精度。
3
The second part is to introduce the useful prompt to measure the lowlevelsignal noise and its disturbance even more accurately when there is rather high noise level in measure system.