QSFP28 Host (Quad Small Form Factor) MSA Compliant Master Host board ML4041-K  provides an efficient and easy method for programming and testing 4x28G QSFP28 transceivers. The ML4041-K includes a complete Window’s based software and a user's manual to enable intuitive memory map programming and testing via mini B USB. The QSFP28 host (ML4041-K) uses 40GHz K connectors. It is designed to simulate an ideal environment for QSFP28 transceivers module and cable testing, characterization and manufacturing tests. Its properties make the host board as electrically transparent as possible; hence, allowing for a more accurate assessment of the module’s performance.   Key Features: -Matched differential trace length -DUT voltage supply control (3.15V, 3.3V, 3.45V, or other user specified voltage levels) -DUT Current Sense -Superior Signal Integrity Performance Rogers 3003 based PCBs -Low Insertion Loss -Temperature Monitor -Four corner test capability -Supports 4x28G interfaces -I2C master driven from both on board micro controller and external pin headers -USB interface -User friendly GUI for I2C R/W commands and loading custom MSA Memory Maps -All 4 channels come with matching trace length -On-board LEDs showing MSA output Alarms states -On-board buttons/jumpers for MSA input control signals   Applications: -4x28G Electrical module testing and characterization -High-speed data interface between the ASIC (SerDes) and the QSFP28 module -Multimode and single mode fiber application -Optical Fiber Testing