what HD broadcasts take up HD 101: What is ATSC, PSIP, QAM, and 8-VSB? HD 101: What is ATSC, PSIP, QAM, and 8-VSB? HD 101: What is ATSC, PSIP, QAM, and 8-VSB? HD 101: What is ATSC, PSIP, QAM, and 8-VSB? clear QAM or what HD broadcasts take up