ETL Systems, founded in 1984 and headquartered in the UK, is a privately owned company with approximately 120 employees. The company specializes in designing and manufacturing radio frequency equipment for various industries, including teleports, broadcasters, marine, military, and government agencies. Their product offerings include rack systems and radio frequency components such as amplifiers, couplers, remote controllers, and radio frequency over the fiber-optic link. Additionally, ETL Systems provides equipment repair services and professional services to its customers.