Oops, add 19.575 (yes, it is 19.575 not 19.6) Under 200 Bd/100 Hz per below. For what its worth (measured): 100 Bd/50 Hz 20.9 22.1 51.95 81.0 200 Bd/100 Hz 16.4 21.4 21.75 23.4 24.0 24.8 25.2 37.5 40.75 62.6 65.8 300 Bd/150 Hz (apparently, though I have never seen this mode mentioned) 73.6