KZUP-CD is a low-power Class A television station in Baton Rouge, Louisiana, broadcasting on local digital UHF channel 20 and virtual channel 19.1. Founded in 1995 as KBTR, it owned by White Knight Broadcasting. It is an affiliate of the Retro Television Network (RTV), a system of television stations that air classic television shows as well as more recently produced programs. RTV programming is a round-the-clock schedule of shows dating from the 1950s along with rarely seen older programming and more recently-produced programming, such as "Cold Squad," "Da Vinci's Inquest" as well as reality and documentary programming, including reruns of "Cold Case Files." RTV also features a Saturday morning block of vintage cartoon programming. KZUP broadcasts games from Southern University in Baton Rouge, Louisiana, as their official station. KZUP was previously affiliated with UPN from 1999 until 2003 and became an independent station in 2003, branded as Z-19.