What is an EMI signal generator? 

Figure: EMI signal generator 

EMI signal generator is an RF signal generator used to produce RF signals (continuous waves) that can be adjusted by frequency, output voltage, waveform, modulation, and impedance. They are designed to generate electronic signals with high spectral purity and reliable frequency and amplitude. The signal generators are used in many applications, including EMC/EMI testing, production test & measurement, installation in cellular communications, radar, WiFi, GPS, audio, satellite communications, Research and Development (R&D) labs, education, and more.  

In EMC immunity testing, an EMI signal generator is an important test instrument used to generate test signals for conducted and radiated EMC testing to verify the immunity of electrical and electronics products against the conducted and radiated EMI. In EMC testing, the test signals generated by the EMI signal generator are used to simulate conducted and radiated EMI. The EMC immunity testing is performed to ensure the electrical and electronic products operate properly and will tolerate the conducted and radiated EMI that electronic devices may encounter in real-world environments. The EMC/EMI signal generators usually come with AM, FM, Pulse, and Phase modulation features to meet the testing requirements of various standards such as IEC, EN, MIL-STD, DO-160, CISPR, and more.  

EMC/EMI signal generator types include Analog and vector signal generators. These signal generators have a user-friendly interface and a clear and bright display. They have various frequency range options and provide remote control through their network, RS232, and USB and optical interfaces.