Technical Specifications1 Wavelength (nm) 1310/1550 Dynamic range (dB)2 38/36, 32/30 Pulse width (ns) 5,20,40,80,160,320,640,1280,2560,5120,10240,20480 Event blind zone (m)3 2m Attenuation blind zone (m)3 9m Linearity (dB/dB) ±0.05 dB/ dB Loss threshold (dB) 0.05 Loss resolution ratio (dB) 0.01 Sampling resolution ratio (m) 0.125 to 8 Sampling point 32K Distance uncertainty (m) ±(1 m + 510-5 distance + sampling interval) Distance scope (km) 0.3 to180 Typical real-time refreshing duration (s) 0.2 Memory capacity of trace SD Card (2G), > 10000 pieces Duration of measurement Defined by user; 5sec, 10sec, 15sec, 30sec, 1min, 2min, and 3min are selectable General specification Dimension (HWD) 15023566 Weight 1.5kg Temperature Running temperature -10 to 50 Memory temperature -40 to 70 Relative humidity 0% to 95% (non condensation) Power supply Lithium battery; continuing working duration ?¥ 8 hours Warranty period 12 months Remarks: 1. The technical specification describes the ensured performance of the instrument when using typical PC model connector to measure. Without considering the uncertainty caused by optical fiber refractivity.2. Dynamic range is the data measured under the condition of the maximum pulse width and 3 minutes of average time. Dynamic range is the data measured under the condition of 180km/20480ns/3min. 3. Measuring conditions of blind zone: reflection event is within 4Km, reflection strength < -35dB. Measured by the minimum pulse width.