ORIGINAL: JoeAirPort
One thing to consider also, the spektrum module uses ppm which is only 512 resolution.
This is not True. Spektrum is 1024 or 2048 depending on which RX you are using.
And just because the transmitter is in ppm mode, that only has to do with the signal from the transmitter to the module that you plug in. the module produces the rf signal (notice how the antenna is attached to it and not the Tx?) which goes to the Rx and that is 2.4 gHz, PCM digital code,
NOT PPM.