Background Calibration

The Background calibration is only useful for applications in which the surrounding is static and the sensor is not moved throughout the measurements

In some applications it may be useful to set a background calibration on the sensor. This is recommended, for example, if measurements are to be taken in a highly reflective environment and the reflections not required for the measurement are to be masked out.
The background calibration takes a "snapshot" of the signals visible in the spectrum and subtracts these signals for all measurements done after the calibration. Therefore, this setting is only useful for applications in which the surrounding is static and the sensor is not moved throughout the measurements.

To set the background calibration please do the following:

1. Measurements with the measurement object:
   Before you start setting the background calibration, position your measurement object at a medium distance within the measuring range. Please make sure that the sensor is positioned correctly, the measuring range and the parameters in the raw data view are set appropriately. These cannot be easily changed after the background calibration is set. It must also be ensured that the sensor has been placed firmly, i.e. it should not be moved by vibrations or similar.

2. Remove the measurement object:
   The goal of the background calibration is to subtract all signals originating from a static background in
   order to isolate the signals originating from the measurement object. Therefore, to take a "‘snapshot"’ of
   the background, please move the measurement object out of sight of the radar sensor.

3. Setting the background calibration:
   After removing the measurement object, start setting the background calibration by clicking on the CALIBRATE button in the settings panel on the right and confirm it.

4. Measurements with the measurement object:
   The background calibration is completed and you can now take measurements with the measurement
   object in sight of the sensor. The amount of signals visible in the spectrum view should be decreased
   compared to the amount of signals that were visible before the background calibration was set.
   After successful calibration you will see a label “calibrated” above the individual views. Also, all amplifier settings in the raw data view are disabled. If you want to change these parameters, please remove the background calibration as described below, change the parameters and set the background calibration again.
   After setting, it can take a few seconds until the sensor provides a good signal again. If your sensor is not firmly positioned and is moved, for example, by vibrations, you will be able to recognize this in the signal. The signal will then be very choppy and flicker.

Deleting the background calibration:
To delete the background calibration and thus reactivate the amplifier parameters in the raw data view, please click on the REMOVE CALIBRATION button in the settings panel on the right and confirm.