Raw Data

Use the AUTO GAIN button to optimize amplification parameters, significantly improving signal quality and measurement robustness.

The Raw Data view shows the echo raw data for the sampled time domain. It contains information about the distance and size of the target. The AUTO GAIN button automatically optimizes the amplification parameters for your specific application, significantly enhancing signal quality and measurement robustness. The suitable values of the amplification parameters differ between measurements. Therefore, they should be adjusted during a typical measurement.

If the target is in motion, it's recommended to click AUTO GAIN when the target is positioned midway between its maximum and minimum distances. If the furthest signal isn’t detected with the initial amplification, move the sensor closer to the maximum distance and click AUTO GAIN again to recalibrate. If maintaining accuracy at close range is critical, configure AUTOGAIN at a closer distance, accepting that distant targets may not be reliably detected. Conversely, if distant targets are equally important, you might prioritize their detection and set AUTOGAIN at a further distance, even if it means accepting some clipping at closer ranges. Ultimately, the choice depends on which distance is more critical for your application.

The graph should show a sinus function with high amplitudes. The images below illustrate examples of both correct and incorrect settings. Optimal results are typically achieved when the curves range between -127 and +127, ensuring that the peaks of the curves are not clipped.

Even with clipped signals, the robust OndoSense algorithms can calculate the correct distance, although the measurement accuracy will be lower. If the signal received by the sensor is too weak for a meaningful measurement, a “weak signal” label will appear above this view.

If AutoGain, in combination with all other correctly set parameters, does not yield the desired results, you can manually adjust the ADC Amp Gain and Pre Amp Gain value incrementally while monitoring the raw data display. It is good practice to use the same amplifier values for I and Q, so the amplification parameters are linked. If you want to adjust the channels individually, click on the linked button.