The IT9200 is a synthesized frequency source that can be phase locked to an external reference originating from a short-pulsed laser system. Synthesized output frequencies can be programmed to integral multiples of the reference. The basic source has an operating range from 4-10 GHz with a tuning resolution of 1 MHz. Options are available to extend the frequency range from 10-20 GHz with 2 MHz resolution, as well as an option to go from 2-4 GHz with 0.5 MHz resolution. When not used with an external laser reference signal, the source can be used as a general frequency synthesizer using an internal or external 10 MHz crystal reference.