The NK2800 mini optical time domain reflectometer iscompact and easy to carry;it adopts a 3.5-inch high-definitiontouch screen,supports multi-touch andsmooth operation.Internal integration of OTDR,event map,optical power meter,red light,flashlightand otherfunctions in one,to meet varioustion adopts 1550nm wavelength and built-in high-efficiencywavelength isolator.It can perform optical test on 1490nmand 1577nm links.It supports up to about +10dBm withopticaltest capability,and the maximum measurement rangeis 80km.The Nk2800 is usedto measure the length,loss,connec-tion quality andother parameters of the optical fiber.It caneasily test the breakpoint,bend,and loss pointof theopticalfiber link.It is suitable for line maintenance and emergencyrepairtestingby installation and maintenancepersonnel.