https://news.****************/articles/n39100/San-Diegos-KWFN-Improves-HD-Signal-with-MaxxCast
Entercom's KWFN-FM in San Diego has substantially improved its signal through the launch of a MaxxCasting system from GeoBroadcast Solutions. The four-node single-frequency network (SFN), which represents the first commercially deployed HD Radi Single Frequency Network (HD SFN), extends clear FM and HD Radio coverage up and down the busy Interstate 15 and State Route 78 corridors. The improved signal also increases penetration with Nielsen PPM Portable People Meters (PPMs) to help broadcasters accurately measure audiences and set advertising rates