===== Initial informations =====
The remote control send a PWM((PWM : Pulse Width Modulation)) total width 20 ms pulse 1-2 ms separation 0.4 ms
  * FM 25 MHz ou 35.2 / 2.2 kHz

  * Base band output of the remote control : 5 V à 10 V


European reserved frequencies :
  * 35 MHz: aircraft only.
  * 40 MHz: surface vehicles.
  * 27 MHz: general use, toys, citizens band radio.

**External link**
  * [[http://www.mp.ttu.ee/risto/rc/electronics/radio/signal.htm]]
  * [[http://en.wikipedia.org/wiki/Pulse-width_modulation]]
  * http://www.ofcom.org.uk/static/archive/ra/publication/ra_info/ra60.htm
  * http://www.ofcom.org.uk/radiocomms/ifi/licensing/classes/rlans/technical/ofw311/
  * http://en.wikipedia.org/wiki/Radio-controlled_aircraft