... 2GB SD storage)Group refractive index setting1.00000 to 2.00000 (0.00001steps)Distance unitkm,m,kft,ftDisplay640 ... Measurement accuracy: 5% ( -10dBm, CW)Power supplyAC adapter 100 to 240V, 50/60Hz, 1.5A DC:19V± ... is present after the fiber under test is connected, once the light is verified present, simultaneously, ... ο Updating application software on-line JIAXUN High Performance Optical OTDR - JX8002