Application:Determine fiber optic cable or fiber optic''s failure point, connection point, breakpoint position. Describe fiber optic cable or fiber''s loss distribution curve, measure cable, fiber''s length and the loss, attenuation coefficient between two points Measure fiber optic cable, optical fiber connector''s insertion lossMeasure fiber optic cable, optical fiber''s reflection lossBe widely used in metropolitan, WAN, CATV and other communication systems for fiber optic cable or fiber installation, troubleshoot, transformation and maintenance.