[1][2][3] The SQCS entered radio with a three-station AM network, with transmitters at Chetumal, Cancún and Felipe Carrillo Puerto broadcasting on 860 kHz.
The SQCS later added a fourth AM station when it built Radio Riviera XERRIV-AM 1180 in Playa del Carmen.
In 2005, the Cancún radio tower was blown down by Hurricane Wilma; XHCBJ operated on low power for twelve years until its frequency change to 101.9 MHz on February 5, 2018.
[5] SQCS currently operates five radio services, including two AM and three FM stations: Like many state networks, public television in Quintana Roo grew as a byproduct of local optouts from the Instituto Mexicano de la Televisión (Imevisión).
At its height, SQCS had five analog transmitters: Felipe Carrillo Puerto, Cancún, Chetumal, Playa del Carmen and José María Morelos.