WTTO and WDBB shut down their analog signals, respectively over UHF channels 21 and 17, at 11:59 p.m. on that date. WTTO's digital signal remained on its pre-transition UHF channel 28; through the use of PSIP, digital television receivers display the station's virtual channel as its former UHF analog channel 21. WDBB also continued to operate its digital signal on its pre-transition digital channel, UHF 18; digital television receivers display its virtual channel as its former UHF analog channel 17. As part of the SAFER Act, WTTO and WDBB kept its analog signal on the air until March 19 to inform viewers of the digital television transition through a loop of public service announcements from the National Association of Broadcasters.