STL-SG-022403-S1 is a portable, touchscreen and USB controlled Synthesized Signal Generator designed and manufactured for standard test instrumentation, communication, and radar systems as a local signal source. It covers a frequency range of 0.2 to 40 GHz with exceptionally low harmonics and spurious emissions, as well as superior low phase noise performance. It is externally referenced with a high-performance internal reference backup. The frequency resolution of the module is up to 0.2 Hz. This Synthesized Signal Generator has a maximum spurious of -60 dBc. It has a built-in voltage regulator to further improve the signal quality and provide overvoltage protection. This instrument integrates an advanced embedded processor, which runs stably and responds quickly. It supports direct touchscreen control via an easy-accessible HMI or can be remotely controlled with the USB Type-B port by the computer.