The NX3224Y from Narda-ATM is a Noise Source with Frequency 2 to 4 GHz, Excess Noise Ratio (ENR) 30 to 35 dB, Flatness ±1 dB, Temperature Coefficient 0.01 dB/Degree C, Voltage Coefficient 0.1 dB/%V. Tags: Module with Connectors. More details for NX3224Y can be seen below.