This station is a cryogenic temperature probe station with closed-cycle refrigeration. The temperature range is 4.2 K to 400 K. It is equipped with 4 characterization probes capable of operation from DC to 40 GHz. It is also equipped with a fiber optic source for in-situ sample illumination over a range of 190 nm to 1000 nm. This system is suitable for manual or automated measurements and can be externally synchronized with precision test instrumentation.