Comtech EF Data's satellite and cable television systems open the floodgates of information. Its satellite modems, frequency converters, and earth stations convert and transmit voice, video, or data across satellite systems. The company's digital audio and video broadcast equipment is used by radio stations, retailers, and financial groups to distribute advertising, music, video, and images. Comtech EF Data also makes equipment used by cable TV companies to broadcast digital video and high-definition TV across their terrestrial systems. Customers have included the US Department of Defense. Formerly known as Radyne, the company was acquired by rival Comtech Telecommunications for about $224 million in 2008.