Probe adapter and measurement system

A probe adapter, comprising:

• a first interface, configured to be electrically connected to a probe to receive a measured signal;
• a second interface, configured to be electrically connected to a measuring instrument to input the measured signal into the measuring instrument;
• signal transmission lines, comprising a first signal transmission line, a second signal transmission line, and a line selection switch, wherein the first signal transmission line and the second signal transmission line are both located between the first interface and the second interface, and the line selection switch is configured to select the first signal transmission line or the second signal transmission line to conduct the first interface and the second interface;
• and
• a signal conditioning circuit, located on the second signal transmission line, and configured to adjust an impedance of the measured signal to match an input impedance of the measuring instrument, and/or adjust an amplitude of the measured signal to match a measurement range of the measuring instrument.