Noise figure is a figure-of-merit that describes the degradation of signal-to-noise ratio due to added output noise power of a device, such as an amplifier. This video describes how to make high-quality amplifier noise figure measurements with an Anritsu VectorStar vector network analyzer. Option 41 for the Anritsu VectorStar family of VNAs enables easy and accurate NF measurements. This video will show you just how easy it is.