... 4,8,16mDistance range0.4,0.8,1.6,3.2,6.4,16,32,64,128,256,512km(SMF ... );0.4,0.8,1.6,3.2,6.4,16,32 (MMF of 850nm)Pulse width5 ... 00000 (0.00001steps)Distance unitkm,m,kft,ftDisplay640×480, 6.5 inch TFT-LCD (touch screen)InterfaceUSB, Min-USB, Ethernet, earphone, SDOptical ... , which the operation distance is in excess of 5 kilometers.Communication Light CheckWhen measuring a fiber in service, ...