The Digital Lightwave LW OSD is a low-cost, handheld instrument designed for identifying signals in fiber-optic cables. During maintenance, installation, rerouting, or restoration, it is often necessary to isolate a specific fiber from a bundle without disrupting service. By simply clamping the LW OSD onto a fiber before making any cuts, the identifier will indicate if there is Traffic, Tone. or No Signal. Although the LW OSD is recommended for up to 3 mm jacketed fiber, it is equipped with a unique two-position head design that can be configured to work with 250 um, 900 um, ribbon, or jacketed fiber in seconds - without tools or CAM adjustments.