Patent ID: 8264348

Claim:
A system for adjusting a threshold value of an alarm event trigger based on a detected interference level, the system comprising: a discrepancy calculating module, the discrepancy calculating module using a plurality of sample values to calculate a discrepancy value based on a difference between a maximum value and a minimum value of the plurality of sample values; a comparing module, the comparing module comparing the discrepancy value to a predefined interference threshold value and generating an activation signal; a fast threshold adjustment module, the fast threshold module receiving the activation signal when the discrepancy value is at least equal to the predefined interference threshold value; and a slow threshold adjustment module, the slow threshold adjustment module receiving the activation signal when the discrepancy value is less than the predefined interference threshold value, the activation signal triggering an output from one of the fast threshold adjustment module and the slow threshold adjustment module, the output being used to adjust the threshold value.