On Sun, 4 Jul 2010 16:27:23 -0700 (PDT), Telstar Electronics
wrote:

Can someone explain to me why superimposing audio on an RF signal...
then clipping it... is any better than just clipping an audio signal?
Doesn't make any sense to me. They are both clipping and distorting
the waveshape... and that's bad!

Higher levels of compression and intelligibility can be accomplished
with RF clipping. This end result must be filtered to get this gain
without creating a dirty RF signal.