In order to perform these tests, the basic fiber optic instruments are the FO power meter, test source, OTDR, optical spectrum analyzer and an inspection microscope. These and some other specialized instruments are described below. Fiber optic cabling is the high-performance core of today's datacom networks. What do fiber testers do? Which fiber tester is right for you? In. Data centers and enterprises rely heavily on optical fiber cabling to support the exploding demand for bandwidth, so being able to test its quality is critical to maximizing network performance and uptime. Fluke Networks has a wide range of Fiber Optic testing products to help certify that power. Testing fiber optic components and cable plants requires making several measurements with the most common measurement parameters listed in the Table below. Optical power, required for measuring source power, receiver power and, when used with a test source, loss or attenuation, is the most. AFL optical power meters, light sources, and test kits are necessary tools for technicians working on fiber networks to ensure the health of fiber networks. It helps minimize downtime, reduce maintenance costs, and support system upgrades or reconfigurations.