The PR 4400 precision reflectometer measures reflections as a function of distance in fiber optic components or assemblies. Available from Luna Technologies Inc., the high-speed inspection and diagnostic tool for designers and manufacturers locates and troubleshoots connectors and fiber breaks. It features two-point spatial resolution of 40 μm over 70 m and views entire assemblies of up to 2 km in one scan with no dead zone. Offering –90-dB sensitivity and 55-dB dynamic range, it provides automated RL verification for connectors and cables as well as high- resolution fiber and waveguide characterization. It comes configured with a laptop computer and an internal tunable laser source.