In this poster presentation, the importance of monitoring functions in modern radar receivers is discussed. It is pointed out that already available monitoring concepts do not cover nonlinearities. A possible nonlinearity is the integral nonlinearity (INL) of a pipelined analog-to-digital converter (ADC). It is shown that this INL severely reduces the sensitivity of the radar sensor. Finally, a rough roadmap concerning current objectives, challenges, as well as future work, is presented.