Brian, QAM 256 has 38Mbps of throughput and doesn't require the error checking of ATSC. This combined with statistical multiplexing, most cable co's fit 3 or more HD channels on one SD channel.
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Brian,
QAM 256 has 38Mbps of throughput and doesn't require the error checking of ATSC. This combined with statistical multiplexing, most cable co's fit 3 or more HD channels on one SD channel.