WKBS-TV
WKBS-TV, virtual channel 47 (VHF digital channel 6), is a Cornerstone Television owned-and-operated station licensed to Altoona, Pennsylvania, United States. The station's transmitter is located in Logan Township. 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. WKBS-TV is a straight simulcast of  WPCB-TV; on-air references to WKBS-TV are limited to Federal Communications Commission (FCC)-mandated hourly station identifications during programming. 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. History. In 1983, Cornerstone Television was granted a construction permit for channel 47 in Altoona, Pennsylvania, to serve the Johnstown–Altoona market. It bought the transmitter used by the original WKBS-TV (channel 48) in Philadelphia when that station went dark in 1983, and used this transmitter to put  channel 47 on the air November 2, 1985, reusing the WKBS-TV callsign. Digital television. Digital channels. The station's digital signal is multiplexed: Analog-to-digital conversion. WKBS-TV shut down its analog signal, over UHF channel 47, on June 12, 2009, the official date in which full-power television stations in the United States transitioned from analog to digital broadcasts under federal mandate. The station's digital signal remained on its pre-transition UHF channel 46. Through the use of PSIP, digital television receivers display the station's virtual channel as its former UHF analog channel 47. WKBS