The mini fiber tester permit you to test fiber opticcable for continuity sending a beam of light form a transmitter and receiving by a optical receiver
Before you operate Mini Fiber Tester , please remove the protective covers from the fiber connector , then plug the fiber optical cable one end to the RXR (receiving end). When you put the power switch on the tester's display will show the power launched from the TXR. 

Specifications

                1. Fiber Core: 62.5/125
                2. Output Wavelength850mm+-
                3. Readout Range :-22dBm to -40dBm
                3. Readout Resosution : 1dBm
                4. Power: DC 9V Battery 

Ordering Information:
                 21-8681-00   (ST  TYPE)
                 21-8682-00   (SC  TYPE)