A probe is an instrument that can send electronic signals, which can be captured by the corresponding probe for accurate positioning. Generally divided into low-frequency probes, high-frequency probes, and wired probes.

An electric field is a physical field that exists around a charge and can transfer charges and interact with them. There is an electric field generated by the electric charge around it; At the same time, the electric field exerts a force on other charges in the field. The field observed by an observer when the electric charge is stationary is called an electrostatic field. If the charge moves relative to the observer, in addition to static electricity, a magnetic field also appears. In addition to electric charges, changing magnetic fields can also cause electric fields. The former is an electrostatic field, while the latter is called a vortex electric field or an induced electric field. The changing magnetic field causes an electric field. So the interaction between moving charges or currents needs to be transmitted through electromagnetic fields.

Local radiation interference experiments can be conducted on the sample. The pointed end can emit radio frequency (RF) interference to the surrounding area, so anti-interference experiments can be conducted locally on the substrate and IC chip. Using a frequency of 3GHz, it can achieve approximately 30W interference power.