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Uploaded on Aug 21, 2011
This is Lecture 17 in the FOA series on fiber optics. This lecture is on OTDRS - optical time domain reflectometers. OTDRs are very powerful test tools for fiber optics but are complex and require more analysis of the test information than most instruments. This lecture, the first of 3 on OTDRs, covers the basics of how OTDRs work.