WKBS-TV
WKBS-TV operates as a full-time satellite of Cornerstone's flagship station, Greensburg-licensed WPCB-TV (channel 40), whose studios are located in Wall, Pennsylvania.WKBS-TV covers areas of West-Central Pennsylvania that receive a marginal to non-existent over-the-air signal from WPCB-TV, although there is significant overlap between the two stations' contours otherwise.Besides the transmitter, WKBS-TV does not maintain any physical presence in Altoona, and unlike its parent station, it does not broadcast in high definition and has a different subchannel lineup.In 1983, Cornerstone Television was granted a construction permit for channel 47 in Altoona, Pennsylvania, to serve the Johnstown–Altoona market.The station's digital signal is multiplexed: WKBS-TV shut down its analog signal, over UHF channel 47, on June 12, 2009, the official date on which full-power television stations in the United States transitioned from analog to digital broadcasts under federal mandate.