> so they're abiding by direct spectral mask limits Yes, obtained by channelization and OFDM, not by limiting modulation. Reverse engineering of the 10 to 12.

> so they're abiding by direct spectral mask limits Yes, obtained by channelization and OFDM, not by limiting modulation. Reverse engineering of the 10 to 12.7GHz band has shown a mixture of 16-QAM and 64-QAM frames. There's a bit of periodic 4-QAM too, which seems to be for acquisition and synchronization. Even 16-QAM can climb basically to 5 bits/Hz.