Somewhat simplified answer: In addition to broadcasting all the music and talk channels, Sirius broadcasts the id codes for every registered receiver. The receiver listens for its code. If it hears it, it is activiated. If not, it isn't.
A forum community dedicated to home theater owners and enthusiasts. Come join the discussion about home audio/video, TVs, projectors, screens, receivers, speakers, projects, DIY’s, product reviews, accessories, classifieds, and more!
