XHNAT began testing its two new subchannels 45.2 and 45.3 on April 16, 2013, but it was not until February 7, 2014 that XHNAT began programming them with news network Milenio TV on channel 45.2 in 1080i HD and Norteño music network Teleritmo on channel 45.3 in standard definition.
XHNAT introduced its two new subchannels, 45.2 and 45.3, on April 16, 2013, but it wasn't until February 7, 2014 that the station started airing programming on them, including news network Milenio TV in high-definition on channel 45.2 and music network Teleritmo on channel 45.3.