1. A method of reducing AM noise in a detected FMCW signal, comprising: receiving a detected FMCW radar signal from a radar system; sweeping the frequency of the radar system within at least a portion of the operating frequency range of the radar system; monitoring the IF level of the detected FMCW radar signal during sweep in the frequency; setting the radar system to the frequency based on the measured level of the detected FMCW radar signal.