but still a little detail.. the radio control set here in RC world is a device, in pair as TX (the Transmitter) and RX ( the Receiver), while the Tx holds in our hand, and the Rx placed in the craft that to be controlled.. an Encoder integrated circuit generates and integrates a pulse signals mostly based from 1 to 2 m/s, as 1.5 m/s as the neutral point, and this encoded signal feded to an radio transmitter circuit that emits the modulated signal to the air via an appropriate antenna.. this may be in to MHz or Ghz, is all up to the radio.. this also goes in to AM ( amplitudemodulation) and FM (frequency modulation)..
the modulated signal is accepted by the RX, and decodes, and converts in to the signal that dives the servos again..
the servos are an electromechanical device which interprets the electric signal, pulses, from 1, 1.5, to 2, as mechanical movements.. this drives the servo arm, is all up to the proportions of TX stick.. in degrees.. thus we controls the machine in a wireless mode.. it is hard to explian the phenomena of radio, within a short span.. so go for some nice reardings and some self researches.. have nice Rcying again..