The National Instruments USB-5680 is a 6 GHz true RMS power meter that features high measurement accuracy and wide dynamic range packaged in a size similar to a typical power head. It is designed as a highly accurate instrument, offering better than ±0.18 dB of linearity across all frequency ranges and all power levels. As a true RMS power meter, the NI USB-5680 is ideal for measuring the power of continuous wave signals. This functionality, combined with a flexible API, makes it ideal for measuring path loss in automated test applications. In addition, its small size (less than 9.6 cubic in.) frees up valuable rack space without sacrificing performance.