The 110 GHz ONA solution is comprised of a 110 GHz VectorStar VNA, a 110 GHz NIST traceable reference photodetector, and a 110 GHz electro-optical modulator. The complete solution is used to characterize and measure opto-electronic devices and components that are used extensively to support higher baud rates for data communication. Devices like lasers, VSCELS, TOSA, ROSA , BOSA, and SiPh need to be characterized for bandwidth, group delay, return loss, and other key performance parameters. The Anritsu 110 GHz ONA solution is a highly flexible and easy to use solution since its easily upgradable, not only in terms of number of ports (from 2 to 4), but also in terms of frequency range where a user can start with a 70 GHz VNA and then later upgrade the system to a 110 GHz or even beyond to 145 and 220 GHz. The 110 GHz VNA has state of the art mmWave modules that are manufactured by Anritsu and based on a patented technology called NLTL. This technology enables ultra stable and highly accurate and precise measurements up to 110 GHz. The system has exceptional calibration and measurement stability. The system also comes with a NIST traceable reference photodetector that covers both 1310 nm and 1550 nm wavelengths. The 110 GHz E/O modulator provides great system specifications, independent control of built in (or external) laser, dithering control, as well as automatic bias control.