Complex sentence: However, as a UHF station, it suffered in the ratings because television sets were not required to incorporate UHF tuning until the All-Channel Receiver Act went into effect in 1964.
Split into simpler sentences: However, as a UHF station, it suffered in the ratings. This was because television sets were not required to incorporate UHF tuning until the All-Channel Receiver Act went into effect in 1964.