Anritsu Co. introduces two options for its MN4765B series of O/E calibration modules that help to create a highly accurate, flexible and cost-effective solution for the characterization of optoelectronic devices such as modulators, photoreceivers and integrated optical transceiver modules. With these new options, the MN4765B can be used with the MS4640B VectorStar® Vector Network Analyzer (VNA) family to perform optoelectronic measurements up to 70 GHz at both 1310 nm and 1550 nm wavelengths.