The MU100022A is an OTDR Module for the Anritsu Network Master Pro (MT1000A), designed for single-mode fiber testing at 1310/1550/1625 nm wavelengths. It enables precise identification of fiber faults and performance issues, crucial for maintaining high-quality optical networks. The module's advanced features, including multiple measurement modes and a comprehensive Fiber Visualizer, facilitate efficient and accurate fiber network assessments.