The width of the signal for control channel 1 (the black line) varies depending on the position of the control joystick (joystick is far left on the top trace, centre in the middle and far right on the bottom trace). This encoding is easily seen in the traces below, which show 3 separate ‘packets’ that include the position of all 6 channels. The position value transmitted for each channel is encoded by the time of the high state. It begins with a start frame (high state for more than 2ms). In Radio Control systems, a complete PPM frame is about 22.5ms, and signal low state is always 0.3ms. Pulse-position modulation (PPM) is a form of signal modulation in which M message bits are encoded by transmitting a single train of pulses, continuously repeated every T time period. Later testing with my oscilloscope showed they seem to be the same signal but at different voltage levels.įor my home made cable I decided to use the audio signal, as this suited one end of the cable I had on hand.
#SETTING FS T6 WITH CLEARVIEW SIMULATOR SERIAL#
Some research uncovered that the transmitter communicates from the trainer port using a PPM signal in an ‘audio’ or Serial format. These cables are available ready-made, but I did not want to wait for delivery and, besides, I had all the parts that would be needed to make one. In principle all I need to do is to connect a cable between this and the PC that running the simulator application. The RC transmitter has a special port on the back for simulation/training (and, on some other models, firmware updates). Having acquired a FlySky 6 channel Radio Control transmitter (FS-T6) for a planned model airplane, I decided to take on the common advice that it is worth practicing on a simulator before being let loose on the ‘real thing’.
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