The PE85NS4002 from Pasternack Enterprises Inc is a Noise Source with Frequency 0.2 MHz to 3 GHz, Excess Noise Ratio (ENR) 31 dB, Flatness ±1.5 dB, Temperature Coefficient 0.01dB/Degree C, Voltage 12 V. Tags: Surface Mount. More details for PE85NS4002 can be seen below.