
Echo Rejection Threshold
4
Preliminary Prototype | All right reserved | All Information without warranty
The Echo Rejection Threshold configuration parameter describes the lower cutoff, which tells the sensor the minimum amplitude
of received echoes to be processed. Due to the automatic noise reduction, this value is not equal to the points volume value.
Echo Rejection Threshold
Command
sReje
Effect
Sets the minimum amplitude for echoes above which they are considered valid detections. A low value will
result in a higher number of detections but also a higher probability of false detections
Parameter
5-digit unsigned integer representing the threshold
Applicable Values
Default = 1, min. = 0, max. = 20
Example
CsReje00001\r
for a threshold of 1
Low (0-1) = Low Amplitude Threshold
Medium (2-4) = Medium Amplitude Threshold
Medium (5-20) = High Amplitude Threshold
Low values for the echo rejection
threshold result in lots of instable
points. Those points are not
necessarily
noise
but
small
reflections which can not be
located continuously.
Medium values allow for the
most
versatile
sensor
configuration. Noise is not as
prominent as with lower values,
but false positives can still occur.
High threshold values enable the
detection of larger objects at
medium distances with almost
no false positives. Please note
the rate for false negatives is
increased.
⚠️
Due to the prototype characteristic of the sensor, the sensors threshold is of a linear nature and will not adjust to the
measured distance.
False Positives
False Negative
⚠️
Threshold settings of 0 are not recommend due to noise issues. Settings between 2 and 5 have the biggest impact.