Miniature USB Power Meter The MP-series power meter is a miniature device that measures optical power via a USB 2.0 connection to a PC/laptop or VIAVI test mainframe. This unique device makes digital processing of optical power measurements possible and integrates directly with VIAVI Solutions FiberChekPRO software, the industry-leading automated fiber inspection and analysis program. Its size, functionality, and ease-of-use makes it an extremely useful and practical tool when testing optical power levels. The simple, straightforward, and intuitive software interface offers a well-organized digital solution for both fiber inspection and test procedures.