sorry, i did mean PPM, not PWM

a link was provided earlier. might be this, or it may link to this.

there're links to radios for robot wars. according to this page there
are 2 bands allowed, so maybe those 2.4GHz radios are verbotten. that
sucks! it's a robot competition, not a ham competition.

http://homepages.which.net/~paul.hills/Radio/Radio.html

mike