Peak detection
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Peak detection function is used to automatically detect peaks in a signal or in analysis result. It can be started for each signal window from its context menu (right mouse click) or from main menu, Signal tools/Peak detection option (or graphic  toolbar button).

After choosing peak detection option, the following dialog appears:

graphic

To turn peak detection on for the current window, turn on the Detect peaks check box as shown in above image.

Following settings can be made for peak detection:

·     Absolute amplitude threshold can be set in Positive threshold field. It means that Sigview will consider only amplitudes over that value as possible peak candidates. Default value will be set to 75% of the maximal signal amplitude.
·     If you would also like to detect negative peaks, turn Detect negative peaks check-box on and set corresponding threshold in the Negative threshold field. The value should be entered as absolute amplitude so you do not need a minus sign.
·     Minimal peak width can be defined in samples or signal units (for example Hz or seconds). Setting this property to a higher value will prevent detection of very small peaks where only few values cross the threshold limit.
·     Allow multiple peaks inside one threshold crossing option allows SIGVIEW to detect local peaks inside one threshold crossing. Turning this option on will usually result in increase of detected peak count.

After turning peak detection on and closing the dialog, SIGVIEW will place markers on all detect peaks in the visible parts of the signal. It will look like this: graphic


Each marker shows X-position of the peak (above) and peak amplitude (below).

By using Peak count instrument, you can automatically display or track number of peaks currently detected in the visible signal part.
 
Peak detection