The DNB3-WS-28.75-1 from Narda-MITEQ is a Low Noise Block with RF/Input Frequency 27.5 to 30 GHz, Output Frequency 950 MHz to 1.95 GHz, LO Frequency 26.55 to 28.05 GHz, Output Power 18 dBm, P1dB 18 dBm. More details for DNB3-WS-28.75-1 can be seen below.