What Do You Need?
How do I map the coverage extent from a radio transmitter?
Global Mapper's View Shed tool found on the Terrain Analysis menu has settings for broadcast frequencies, earth curvature, and Fresnel zones. as well as "simple" visible line of sight analysis. Settings can be run 360° around the transmitter location or narrowed to a specific direction and sweep, both horizontally and vertically. For more information, see: