Descrição Roos Instruments makes automated test equipment systems that are used to characterize and test microwave and radio-frequency (RF) semiconductors. The company's customers have included IBM and NXP. Roos Instruments has begun shipping the Cassini, a modular test system for checking wireless communications devices. The company was established in 1989 by microwave/RF engineers from the benchtop instrument industry, including co-founder Mark Roos, the company's CEO, who owns about two-thirds of Roos Instruments. Employees hold one-third of the equity. Founded in 1989, the company has been self-funded throughout its history. Roos Instruments has offices in California and New Hampshire.