Anritsu Co. enhances its MN4765B series of O/E modules for the MS4640B VectorStar® Vector Network Analyzer (VNA) family that creates a cost-effective and flexible solution for measuring 56 Gb/s components and transceivers used in telecommunications and data communications applications. The MN4765B module, combined with the MS4640B VNA, provides a simplified approach for optoelectronic measurements and is an economical alternative to conventional total-system approaches currently used in R&D and manufacturing environments.