1. Usually, the testing loss is mainly based on the cumulative loss value. When testing, setting the fusion loss in the analysis settings to the minimum can intuitively show the cumulative loss of the tested fiber. When measuring, the wavelength is usually set at 1550 window when the length of the tested fiber exceeds 20 kilometers, and at 1310 window when it is less than 20 kilometers.
2. Using OTDR for fiber optic measurement can be divided into three steps: parameter setting, data acquisition, and curve analysis.
3. Before connecting the fiber optic active joint to the OTDR, it must be carefully cleaned, including the output joint and the tested active joint of the OTDR. Otherwise, the insertion loss is too large, the measurement is unreliable, the curves are too noisy, and even the measurement cannot be carried out. It may also damage the OTDR. Avoid using cleaning agents or refractive index matching liquids other than alcohol, as they can dissolve the adhesive inside the fiber optic connector.
4. If you want to use OTDR to test the breakpoint position and loss of optical fibers, it is very simple. Connect the tested optical fiber to the OTDR and ensure that the connector is connected properly. It is best to wipe the fiber optic connector with alcohol before connecting.
5. Set the testing wavelength to the window of 850 (provided that you have this working wavelength). 2. Testing range: set to 0-10km, testing range=actual testing distance * 53 pulse width: the larger the value set according to the measurement distance, this principle.