The PE11S3900 from Pasternack Enterprises Inc is a Frequency Synthesizer with Frequency 35 MHz to 4.4 GHz, Step Size 2.441 KHz, Output Power 10 dBm, Harmonics -30 to -12 dBc, Phase Noise -103 dBc/Hz. Tags: Module with Connectors, PLL Frequency Synthesizer. More details for PE11S3900 can be seen below.