In this hands-on class, we’ll explore how information travels through the air using both analog and digital modulation of radio frequency (RF) waves.Teachers will gain a practical understanding of how radio waves are modified to carry voice and data, and how to analyze real-world signals using modern spectrum tools. From there, we’ll examine how certain wireless devices—such as doorbells, PIR motion alarms, and remote-controlled power switches—communicate, and what their signals reveal.