Provides step-by-step instruction on how to complete each fiber optic task. Enhanced with high quality graphics. Focuses on the optical light source and power meter and how they are used to perform optical loss measurements in Local Area and Wide Area Networks (both singlemode and mulitmode). Demonstrates the advantages and disadvantages of various testing methods. In addition, the importance of accurate documentation is emphasized. Covers: characteristics of optical loss testing, importance of documentation, and optical loss testing methods.