The FTBx-730D - PON from EXFO Inc. is a Optical Time Domain Reflectometer (OTDR) with OTDR Measurement Time 60 minutes, Event Dead Zone 0.5 m, Attenuation Dead Zone 2.2 m, Optical Wavelength 1310 to 1650 nm, Dynamic Range 38 to 39 dB. More details for FTBx-730D - PON can be seen below.