The NJR2835SN from Nisshinbo Micro Devices Inc. is a Low Noise Block with RF/Input Frequency 11.70 to 12.20 GHz, Output Frequency 950 MHz to 1.45 GHz, LO Frequency 10.75 GHz, Gain 55 to 60 dB, LO Frequency Stability +/- 3 ppm. More details for NJR2835SN can be seen below.