XHUAA-TDT, virtual channel 19 (UHF digital channel 22), is a Las Estrellas television station in Tijuana, Baja California, Mexico, whose over-the-air signal also covers the San Diego–Tijuana region across the Mexico–United States border.
XHUAA began broadcasting in digital on UHF 22 in early 2006 making it the second station in Tijuana (and at the time one of very few in Mexico) to have a digital signal (sister station XETV was the first).
By then-current Mexican law, XHUAA was suggested to start broadcasting digital television by January 1, 2010, although this station was allowed at its discretion to start broadcasting DTV before law required it to, and XHUAA-TDT had signed on in 2006.
[5] Tijuana was the first Mexican city to start the analog to digital conversion in Mexico.
XHUAA operates low-power repeaters in Tecate[6] and Col. Playas de Tijuana.