The SmartOTDR 100A from Viavi Solutions Inc. is a Optical Time Domain Reflectometer (OTDR) with Event Dead Zone 1.35 m, Attenuation Dead Zone 4 m, Optical Wavelength 1310 to 1650 nm, Dynamic Range 32 to 37 dB, Pulse Width 5 ns to 20 µs. More details for SmartOTDR 100A can be seen below.