The PE11S3901 from Pasternack Enterprises Inc is a Frequency Synthesizer with Frequency 25 MHz to 6 GHz, Step Size 12.5 to 100 MHz, Harmonics -34.5 to -10.66 dBc, Phase Noise -86 dBc/Hz, Phasenoise 100 KHz -86 dBc/Hz. Tags: Module with Connectors, PLL Frequency Synthesizer. More details for PE11S3901 can be seen below.