The PE19XP5003 from Pasternack Enterprises Inc is a Phase Locked Oscillator with Frequency 100 MHz, Output Power 5 to 9 dBm, Reference Power 4 to 10 dBm, Reference Frequency 10 MHz, Supply Voltage 5 to 12 V. Tags: Module with Connectors, PLXO. More details for PE19XP5003 can be seen below.