Complex sentence: Unlike the case with ATSC tuners there is no FCC requirement that QAM tuners be included in new television sets, but where the same hardware is used for both, ATSC and QAM are commonly included.
Split into simpler sentences: Unlike the case with ATSC tuners there is no FCC requirement that QAM tuners be included in new television sets. As the same hardware is often used for both, ATSC and QAM are commonly included.