Chopper 11 was there when "Goliath" - Erickson Air-Crane lifted this Dielectric UHF Omnidirectional Antenna onto KTVT / KTXA’s tower at the Cedar Hill Antenna Farm in the Dallas / Fort Worth Area. Improvements will mean a stronger signal that covers more area. Crews have been working on the TXA 21 tower for several weeks in preparation for the switch.