Complex sentence: KSFE began broadcasting a digital signal on sister station KNVO's subchannel 48.4 around the same time, enabling much of the Rio Grande Valley to receive The CW over-the-air for the first time ever.
Split into simpler sentences: KSFE began broadcasting a digital signal on sister station KNVO's subchannel 48.4 around the same time. This enabled much of the Rio Grande Valley to receive the CW over the air for the first time ever.