The AQ1216F from Yokogawa Test & Measurement Corporation is a Optical Time Domain Reflectometer (OTDR) with OTDR Measurement Time 3 minutes, Event Dead Zone 0.5 m, Attenuation Dead Zone 2.5 m, Optical Wavelength 1310 to 1650 nm, Dynamic Range 40 to 42 dB. More details for AQ1216F can be seen below.