The SOP-13210018-SF-E8 from ERAVANT is a Phase Locked Oscillator with Frequency 1.28 GHz, Output Power 18 dBm, Reference Power -3 to 3 dBm, Reference Frequency 10 MHz, Supply Voltage 12 to 15 V. Tags: Module with Connectors, PLDRO. More details for SOP-13210018-SF-E8 can be seen below.