Main Features Main Features wheel operation: fast and convenient really a key test: The test is more efficient, more responsive Quick Setup function: operation more intuitive, lightweight handheld setup easier: to carry more convenient, more flexible and durable operation: seismic, moisture more suitable for field construction large storage: can store 800 curves and flexible interfaces: with USB and LAN interfaces, software upgrades, data access is more convenient 5 m jumper accurately test for easy system maintenance Specifications Model Specifications Model Model SB-321 measurements Wavelength (nm) 1310 ± 20/1550 ± 20 Dynamic Range (dB) 31/29 dB Event Dead Zone (m) <3m Attenuation dead zone (m) <25m from General Parameters General Parameters Range (Km) 0.005km ~ ~ 160km pulse width (ns) 5ns ~ 10μs measurement time user-defined (associated with intelligence) with real-time distance measurement accuracy (m) ± (0.5m +0.001% × distance + sampling resolution) Attenuation accuracy ± 0.01dB loss threshold (dB) 0.01dB Loss resolution (dB) 0.001dB range resolution (m) 0.1m sample point data storage 800 64 000 Other indicators Other Indicators Display Type 4-inch TFT color light adapter FC / PC / APC, SC / PC / APC, ST / PC / APC interface, USB, RJ45 Battery Built-in rechargeable lithium battery, charging time 8 hours power AC / DC adapter, Input AC90-240V ± 10%, output 18V Operating Temperature 0 ℃ ~ 40 ℃ Storage temperature -10 ℃ ~ 50 ℃ Relative humidity <80% by weight <1.5Kg Dimensions 247mm × 130mm × 67mm Standard configuration: host charger manual carry bag emulation software Shenzhen weblogs Technology