The PE19XC7008 from Pasternack Enterprises Inc is a Phase Locked Oscillator with Frequency 4 GHz, Output Power 4 to 10 dBm, Reference Frequency 100 MHz, Reference Power 4 to 10 dBm, Supply Voltage 5 to 12 V. Tags: Connectorized, PLXO. More details for PE19XC7008 can be seen below.