| 摘要 |
<p>The detector has a compensation unit comprising a compensation power source (26) controllable by a control signal for generating a power signal changeable parameter as a compensation signal, where the control signal is supplied to an evaluation unit (24). The compensation unit delivers the compensation signal for compensation of electro-magnetic radiation received by a receiving unit (18), where a power signal is superimposed on a measuring signal of the receiving unit, and a generated superimposed signal is adjusted to zero by controlling of the power source.</p> |
