Recently I bought a motor controller for this site http://www.dhgate.com/store/product/30a-high-power-200w-400w-rf-wireless-remote/397513572.html used to controller 12v 30 a motor. It should be adjustable speed, that is acceleration and deceleration. The motor is the source of the EMI We just got in the new frames and are in the process of re-framing all the prototypes to fit updated components. We want to test the receivers on the production frames with production wiring harnesses to eliminate the variables. Can someone tell me how to reduce interference of motor? Many thanks.