The Precision test system line can be expanded to execute tests at voltages to 10kV. Testing up to 4kV and 10kV requires a High Voltage Interface and High Voltage Amplifier. Radiant's 10kV High Voltage Interface (HVI) provides four levels of protection to the user from the high voltages present during test. The HVI has two primary functions. First, it acts as a signal router, sending stimulation voltages from the tester to the HVA while connecting the output of the HVA to the sample. The return signal from the sample is also routed through the HVI on its way back to the tester for analysis.