The power has a good restraining ability form rf interference, and its measurement precisions of probecurrent and voltage are less than 0. 5%.
电源对射频干扰有很好的抑制能力，电压、电流的检测精度均小于0.5%。
2
Scanning tunneling microscope (STM) work by the voltage added to the microscope probe tip and the ends of the scanned object and then detect current changes.
扫描隧道显微镜(STM)的工作方式是把电压加到显微镜探头尖端与被扫描物体这两端，然后检测电流变化。
3
probe: Interrupting normal system action to obtain information about current context.