The FMSN3901 from Fairview Microwave is a Frequency Synthesizer with Frequency 25 MHz to 6 GHz, Step Size 12.5 to 100 MHz, Reference Frequency 5 to 100 MHz, Input Power 15 dBm, Harmonics -34.5 to -10.66 dBc. Tags: Module with Connectors, PLL Frequency Synthesizer. More details for FMSN3901 can be seen below.