Peak Trigger (2D-LC)

The Peak Trigger section allows you to set up the 2D peak detector parameters. The following parameters are available:

Use

Mark this check box to activate the peak trigger. The conditions specified in these fields are used to detect and collect peaks, and to identify peaks in the Preview.

When the check box is cleared, peak triggering is switched off.

Detector

Click the down-arrow and select the detector to use for peak detection from the drop-down list. The list includes all configured detectors.

Signal

Click the down-arrow and select the signal to use for peak detection from the drop-down list. The list includes all available signals from the selected detector.

Peak detection mode

Select the working mode of the peak detector by clicking the down-arrow and selecting the working mode from the list. You can select from:

  • Threshold

    Detects peaks based on threshold values only.

  • Slope

    Detects peaks based on slope values only.

  • SlopeAndThreshold

    Detects peaks based on both threshold and slope values.

Threshold

The height of the peak that triggers collection (see also Peak Start/Stop Criteria and Working with Slope values).

Up Slope

The slope of the rising peak. The slope value is based on the first derivative of the signal (see also Peak Start/Stop Criteria and Working with Slope values).

Down Slope

The slope of the falling peak. The slope value is based on the first derivative of the signal (see also Peak Start/Stop Criteria and Working with Slope values).

Upper Threshold

If the peak detection mode is Slope or Threshold and Slope, peak splitting or detector noise might cause unwanted cut detection or too many small unnecessary cuts to be made. To avoid this, set an upper threshold above which slope-based peak detection is disabled.