Optical power meter refers to an instrument used to measure absolute optical power or the relative loss of optical power through a section of optical fiber. Simply put, it is to measure the attenuation of the optical signal after fiber transmission.

Simple instructions:

Test attenuation (dB), set: the luminous value of the light-emitting device is A, then connect the fiber cable to be tested, and the luminous value is B. The subtraction of these two luminous values is the attenuation of the line under test. At this point, it can be obtained by automatic calculation. After measuring the luminous value of the device, press ZERO to clear it (without shutting down) and then connect the fiber cable to be measured. The third row will directly get the attenuation.