Complex sentence: KMCT-TV shut down its analog signal, over UHF channel 39, on February 17,2009, and "flash-cut" its digital signal into operation on UHF channel 39.
Split into simpler sentences: KMCT-TV shut down its analog signal, over UHF channel 39, on February 17,2009. The station "flash-cut" its digital signal into operation on UHF channel 39.