Differential encoder interface


Hi, I’m wondering why the AQ/BQ signals are connected? If the encoder has a differential output then a differential receiver would make good use of the noise immunity provided, but without the hardware the AQ/BQ signals should probably be ignored. Connecting the screen to 0V would likely improve the noise immunity for free :wink:



The software can use the Q channels to do filtering, but only at very low speeds. The board hardware can’t keep up at higher speeds. Hardware solutions are being considered for future versions.