The NX15238T from Narda-ATM is a Noise Source with Frequency 2 to 38 GHz, Excess Noise Ratio (ENR) 15.5 dB, Flatness ±2.0 dB, Temperature Coefficient 0.01 dB/Degree C, Voltage Coefficient 0.1 dB/%V. Tags: Module with Connectors. More details for NX15238T can be seen below.