... ο Test up to four wavelengths with a single unit ο Communication light check automatically ο Remote function via Ethernet ο Double USB interfaces, ... 2,4,8,16mDistance 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, ... trace and event table ο Updating application software on-line JIAXUN High Performance Optical OTDR - JX8002