 The primary transmitter for XHDY-TDT is located atop Cerro Pig in San Cristóbal de las Casas.XHDY has a second transmitter atop Cerro Huitepec, another mountain in the same municipality, as Cerro Huitepec blocks reception of the Cerro Pig transmitter in some portions of San Cristóbal.Two additional repeaters provide significant coverage extensions