The PE11S3904 from Pasternack Enterprises Inc is a Frequency Synthesizer with Frequency 21 to 24 GHz, Step Size 1 to 400 MHz, Output Power 17 dBm, Current 470 mA, Phase Noise -88 dBc/Hz. Tags: Module with Connectors, PLL Frequency Synthesizer. More details for PE11S3904 can be seen below.