I'm an aero engineer, not an electrical engineer. All I know is that I have owned PPM & PCM systems, in years past, from both JR and Futaba. The MPX Profi has simply blown away all of those systems for range, period. Also, it has been more reliable (at least more so than the Futaba stuff). Not to mention far far more capable. Perhaps I am just lucky now or unlucky back then!

Doug was right, I tend to trust what I know works and the MPX IPD technology works VERY well! (far better than I could say for the two Futaba PCM receiver failures or lock-outs that cost me two planes)