STMicroelectronics STW81200-EVB Evaluation Kit allows programming and operating the STW81200 RF fractional/integer synthesizer. The STMicroelectronics STW81200-EVB includes PC-compatible software with a Graphical User Interface (GUI). The GUI allows for writing and reading all device registers. This feature directly controls circuit functions such as operating frequency, reference frequency, input mode, charge pump current, and low-power modes.