The 980EXT OTDR works well always. But now it is stuck in the upgrade interface, eventhough I did not upgrade it. How to solve it?

Recent years, many OTDR manufacturers and suppliers declare their OTDRs support online testing, but some times, it is a trap if you do not understand what is OTDR online testing clearly. This artical will explain what is OTDR online testing.

By these steps to solve the problem "Application OTDR.exe encountered a serious error and must shut down",

Connect OTDR to your PC by USB cable that comes together with OTDR. (some USB cables is without data transimission function, just for power charging)

One customer complains the ceramic tube came out! check below photo, how can we gix it? Can we remove it for common use? The ceramic tube is from SC connector, not from the OTDR. please pull out the ceramic tube from OTDR slightly, and then install back to SC connector. If it is not easy to installed back, please buy a new SC connector. You can find many suppliers of the connector in the market.