Complex sentence: In April 1980 WBOC-TV received competition for the first time when WMDT (channel 47) signed on as a dual ABC/NBC affiliate, allowing channel 16 to become a full-time CBS station.
Split into simpler sentences: In April 1980, WBOC-TV received competition for the first time when WMDT (channel 47) signed on. The new station also took a dual ABC/NBC affiliation, allowing channel 16 to become a full-time CBS station.