I recently bought Pixhawk 2.4.8 and tried to use it with the ESCs attached in the image below:
However, after booting up, the ESCs are making some strange noises indicating there is some error.
I tried to debug the PWM signal coming out of Pixhawk, only to discover that the signal frequency is around 396hz not 50hz as in the attached image.
is it a normal behavior for Pixhawk to output a 400hz signal for ESC? and if not, what could be the problem knowing that ESCs are calibrated?