Radio Control Tx/Rx Pulse width
Check end point adjustment, check linearity, check for noisy sticks, check trim adjustment, check stick reverse switch, etc.
Plugs directly into your receiver and displays the output from the system on eleven, 5mm LEDs. The centre LED should be lit when the stick is in the centre position, 1.5mS. Move the stick in one direction or the other and the LEDs will light in 0.1mS steps; up or down depending on the direction of the sticks movement . The display shows from 1mS far left to 2mS far right LED.
If the radio signal is picking up noise from nearby electrical interference. This can be seen because the LED's are not stable and jump about all over the place.