On Oct 19, 2011, at 10:12 AM, Merrill Oveson wrote: > what's OTA and QAM? OTA = Over The Air QAM = Quadrature Amplitude Modulation, but the acronym is also used to refer to QAM tuners, not just the modulation scheme. Here is the difference: http://en.wikipedia.org/wiki/QAM_(television) and http://en.wikipedia.org/wiki/Quadrature_amplitude_modulation -- Eric Jacobs