Radar level gauging with signal division

摘要: A method for providing narrow-band interference unaffected measurement of a distance to surface product kept in tank, comprising mixing (S3) return signal with transmit provide an intermediate frequency signal, and determining the distance, based on signal. The step further comprises dividing (S4) into plurality portions, wherein each portion corresponds interval identifying (S5) disturbed portions as affected by interference, (S6) being interference. By IF-signal corresponding intervals where interferences are present may be detected.