This application note is an overview of interference hunting techniques and examples of how to successfully execute them using real-time spectrum analyzers. We’ll provide an overview of interference finding techniques and offer examples to help your next interference hunting efforts to be more successful. We’ll also look at why real-time spectrum analyzers (RTSAs) have emerged as the go-to tool for tracking down elusive signals in a crowded spectrum. Once expensive and desk-bound, a new class of affordable, battery-powered, USB-based RTSAs such as the Tektronix RSA500 make an RTSA a powerful tool for interference-hunting applications.