The STZ-20423415-04-IT2 from ERAVANT is a Noise Source with Frequency 195 to 230 GHz, Excess Noise Ratio (ENR) 15 dB, Flatness ±4 dB, Voltage 15 to 30 V, Current 50 mA. Tags: Module with Connectors. More details for STZ-20423415-04-IT2 can be seen below.