This webinar covers the practical aspects of measuring noise figures on a vector network analyzer (VNA) using the cold source technique. It builds on the concepts introduced earlier in this noise figure series. First, we review the method of the cold source noise figure measurement, pointing out the various parameters the VNA needs to measure in order to calculate the noise figure. This leads naturally to a discussion of measurement challenges, where we find some things are easy to control and measure while others are more difficult. We introduce best practices and techniques for each task to improve the noise figure measurement results. Demonstrations follow, where the instrument is configured for a noise figure measurement, then calibrated, and finally, the noise figure of a low noise amplifier is measured. Co-sponsored by: IEEE North Jersey Section Speaker(s): Michael (Mike) Leffel, Noha Ibrahim Virtual: https://events.vtools.ieee.org/m/426644