![]() ![]() ![]() OTDR fiber tester works indirectly by using a unique phenomena of fiber to imply loss, unlike fiber optic light sources and power meters which measure the loss of the fiber optic cable plant directly by duplicating the transmitter and receiver of the fiber optic transmission links. However, proper instrument operation and interpretation of an OTDR trace still requires special technical training and experience. In addition to required specialized optics and electronics, OTDRs have significant computing ability and a graphical display, so they may provide significant test automation. To measure the attenuation of multiple fibers, it is advisable to test from each end and then average the results, however this considerable extra work is contrary to the common claim that testing can be performed from only one end of the fiber. It may also be used to locate faults, such as breaks, and to measure optical return loss. ![]() It may be used for estimating the fiber length and overall attenuation, including splice and mated-connector losses. The strength of the return pulses is measured and integrated as a function of time, and is plotted as a function of fiber length. It also extracts, from the same end of the fiber,light that is scattered or reflected back from points along the fiber. OTDR injects a series of optical pulses into the fiber under test. It can be considered as the optical equivalent of an electronic time-domain reflectometer. Optical Time-Domain Reflectometer (OTDR) is an optoelectronic instrument used to characterize an optical fiber. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |