Reading more about the RTL - can't wait for mine to show up.
However, might have spoken too soon, 61 PPM might be a little on the high side but maybe
it's not unreasonable for the RTL. In any case, if you can get the scope.py spectrum
FFT plot working it should be simple to center the signal... Which tuner chip do you
have, the E4000 or the R820T ?
Max