The NJS8486HN from Nisshinbo Micro Devices Inc. is a Low Noise Block with RF/Input Frequency 3.4 to 4.2 GHz, Output Frequency 950 MHz to 1.75 GHz, LO Frequency 5.15 GHz, Gain 59 to 66 dB, LO Frequency Stability +/- 10 ppm. More details for NJS8486HN can be seen below.