Normalmodenoise is detected as a peak noise or deviation in a DC signal.
如图1 - 5所示，串模噪声是叠加到希望的输入信号上的误差信号。
2
Normalmodenoise can seriously affect measurements unless steps are taken to minimize the amount added to the desired signal.
如果不采取措施将叠加到信号上的串模噪声减到最小，串模噪声会对测量产生严重的影响。
3
Careful shielding will usually attenuate normalmodenoise, and many instruments have internal filtering to reduce the effects of such noise even further.