Highland Technology presents the K420, a compact digital optical-electrical converter supporting data transport up to 2 GHz (4 GBPS). Featuring a single or bi-directional E-O/O-E link, differential I/O, dual input and output SMA connectors. Inputs accept PECL, ECL, CML or LVDS; AC-coupled outputs are CML/LVDS compatible. Serial header enabling SFP diagnostics. Extending up to 400 m over OM4 fiber, the K420 eliminates ground loops and EMI susceptibility inherent in copper links making it ideal for long-distance systems and high noise environments.