| 摘要 |
<p>A radar level gauge system: first pulse generating circuitry generating a transmission signal; second pulse generating circuitry generating a reference signal, a propagation device arranged to propagate the transmission signal, and to return a reflected signal resulting from reflection of the transmission signal at the surface of a product, measurement circuitry, and processing circuitry for determining a value indicative of a filling level. The measurement circuitry comprises: a time-correlator for generating a sequence of values, a first feedback circuit arranged to receive a signal indicative of the sequence of values, and comprising a feedback loop including a first integrator having a first time constant; a second feedback circuit comprising a feedback loop including a second integrator having a second time constant being higher than the first time constant; and activation circuitry allowing selective activation of the first and the second feedback circuit.</p> |
