The product adopts the architecture of test module + handheld universal test platform, integrating OTDR, visual fault location, optical power meter, light source and other applications. It can expand the end detection function, which can realize multi-pulse width. Multiple wavelengths (850, 1300, 1310,1490, 1550 and 1625 nm) support LAN, datacenters, PON, FTTx and outside plant applications. Manual Expert mode allows simple adjustments to automated settings for detailed testing. SmartLoop™ OTDR technology tests two fibers in a single test eliminating the. Check each product page for other buying options. Streamline your fiber optic network testing and maintenance. The OTDR shoots a laser light down the optical cable and the laser emits a pulse of light at a specific wavelength, this pulse of light travels along the fiber being tested, as the pulse moves down the fiber portions. GAO Tek's OTDRs are used in the field of fiber optics for testing and troubleshooting fiber optic cables. The main function of an. An OTDR (Optical Time Domain Reflectometer) is a measuring instrument intended to measure the transmission loss and distance of optical fibers, locate cable cuts, and evaluate the connection loss and reflectance (return loss) of fusion splices, mechanical splices, connector connections, etc.