Adjust the Threshold

Setting a threshold can increase the robustness of the measurement, but can also lead to false negatives if set too high (e).

Setting a threshold is an effective way to improve the measurement robustness by suppressing targets with a lower signal strength than the signal of interest. This increases the robustness of the measurement significantly. The threshold (in amplitude) is indicated by the orange area in spectrum view (c) in the figure below and can be adjusted by changing the value in the Threshold field (d). Only peaks with a signal strength above this threshold (a) are considered, all others are suppressed (b).

To find the right threshold for your application first position the sensor perpendicular to the target such that the signal amplitude is maximised. Choose a target that is located at the maximal measurement distance. Then set the threshold approximately to 30% of the lowest signal strength. Monitor the measurement for a while to guarantee that the signal strength is never close to the threshold. In a case of doubt, it is always better to set the threshold lower. Be careful with using this feature for collision avoidance applications as a high threshold can lead to false negatives.