Advanced spectrum management can allow operators to understand the nature of the inevitable impairments on HFC networks so they can compensate appropriately for these impairments and create maximum billable bandwidth. This presentation will discuss how operators can more carefully monitor performance in a non-intrusive manner. It will show how operators can automatically correct for impairments and deploy extensions to the DOCSIS 2.0 specification to create more bandwidth for DOCSIS 1.0, 1.1, and 2.0 cable modems. It will also explain how post equalization techniques can allow operators to nearly double the throughput of their installed basis of DOCSIS 1.0 modems by enabling them to run 16 QAM modulation virtually anywhere that QPSK is currently running. By implementing noise cancellation simultaneously over diverse populations of cable modems, operators can provide throughput levels beyond that offered by the specifications to increase revenues while efficiently migrating to DOCSIS 2.0.