A peak is a measurement point whose value is greater or smaller than the adjoining measurement points on its right and left sides. You define what is considered a "peak" by selecting the following two peak criteria settings:
Threshold – To be considered valid for the positive peak search, the peak must be above the threshold level. The valley on either side can be below the threshold level. For negative peak search, valleys below the threshold level are considered valid in the opposite manner.
Excursion – The vertical distance (dB) between the peak and the valleys on both sides. To be considered valid, data values must descend from the peak or ascend from the valley on the both sides by the excursion value.
Peaks are classified into the following two types depending on the difference in magnitude from the measurement points on either side of it.
|
Peak Polarity |
Definition |
| Positive |
A peak whose measured value is greater than those of the measurement points on either side of it. Detect positive peaks which are larger than Threshold. |
| Negative |
A peak whose measured value is smaller than those of the measurement points on either side of it. Detect negative peaks which are smaller than Threshold. |
| Both |
A peak whose measured value is smaller and greater than those of the measurement points on either side of it. No detection due to it does not use Threshold. |