Multi-channel Output is an internal high-voltage switching module attached at the bottom of the instrument. Through multi-channel output module, multiple test points of the components can be connected with multiple channels at a time. During testing, the instrument can be set to control the channel switch. Controllable testing can be achieved by connecting the corresponding port to withstand voltage test terminal. With this multi-channel module, rapid connection can be achieved through test fixture without changing ports during the testing process.