NAB told the agency that the 3.7–4.2 GHz band is widely used to distribute television and radio content to broadcasters. “Virtually every U.S. television and radio household relies on C Band satellite operations for content distribution in some manner,” NAB said.
Thousands of MVPDs, more than 1,000 TV stations, OTT service providers and radio stations rely on C Band. National Public Radio uses C Band for reliable distribution of content to 475 public radio earth stations, a critical link in the distribution chain of content to 42 million Americans every week, NAB said.
From TvTechnology.com