 On January 22, 1992, the FCC granted a construction permit to San Antonio College to build a new station to broadcast on UHF channel 48, and assigned it the call sign K48DS.Signing on in January 1994, the station broadcast educational programming.The FCC allocated channel 48 for KSAT-TV's digital operations in April 1997, and San Antonio College tried to move the station to channel 46, but were denied permission to do so.