The Fiber Optic Power Meter (FOM) measures optical power on fiber optic cables. An FOM indicates any power loss on tested cables using any digital multimeter (DMM) or graphical multimeter (GMM) that has a 10 MW input impedance, standard
diameter banana jacks, and mVdc capability. The Fiber Optic Light Source (FOS) is used as a light source with the FOM or other fiber optic meters. A variety of light sources allow you to test different cable lengths.
