HP Data Explorer 4 manual 118

Chapter 3 Peak Detection and Labeling

	Table 3-1 Chromatogram Settings (Continued)
	Parameter	Description
	Detection Ranges	To delete a range, select the range, then click	.
	(continued)	To combine all ranges in the list into one range, click		.
		The peak detection settings displayed in the dialog box
		correspond to the selected range. To view peak detection
		settings for another range, select the range of interest.
	%Base Peak	Specifies a percentage of the base peak intensity as the
	Intensity	threshold value.
	NOTE: This	To be detected, peaks must be above this threshold and
	parameter was	above the %Max Peak Area value.
	previously named	Hint: For most Voyager applications, leave this parameter
	Peak Threshold%	set at 0 and adjust the %Max Peak Area.
	and Base Peak
3
	Relative%.
	%Max Peak Area	Specifies a percentage of the peak with the largest area as
		the threshold value.
		To be detected, peaks must be above this threshold and
		above the %Base Peak Intensity value.
		%Max Peak Area is calculated above the local baseline and
		can compensate for problems related to a rising global
		baseline and signal spikes.
		Hint: If you are analyzing digest data, set %Max Peak Area
		to 0 before deisotoping to ensure that all peaks of interest
		are detected. For more information, see Section 7.2.3,
		Detecting Peaks from Complex Digests.
	Filter Width	Specifies the number of data points used in smoothing for
		peak detection before integration. The software uses a Filter
		Width Increment of 1 when applying smoothing.
		NOTE: If you set Filter Width too high, narrow peaks may not
		be detected.
			Continued

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