HP Data Explorer 4 manual 383

Peak Detection and Labeling Troubleshooting

Table 9-12 Charge State and Isotope Determination Troubleshooting—Mariner

Only (Continued)

Symptom	Possible Cause		Action
Spectrum peaks labeled	Charge state	Adjust parameters. See:
with incorrect charge state	determination parameters	•	“Peak Processing
when charge state labels	are set such that peaks
			parameters
are selected	are determined to have no
			(spectrum data only)”
	charge
(continued)			on page 3-26
		•	Section 3.2.5,
			Charge State
			Determination and
			Examples
	Noise between isotope	Increase %Base Peak
	peaks is detected	Intensity or %Max Peak
		Area to eliminate noise.
		See “Basic Settings
		(spectrum data only)” on
		page 3-22.
		Apply noise filter. See
		Section 5.7, Noise
		Filtering/Smoothing.
				9
Monoisotopic peak not	Peak detection charge	Adjust parameters to
labeled correctly	state parameters are not	correctly identify the
	set correctly, the software	monoisotopic peak. See
	is identifying the tallest	“Peak Processing
	peak in a cluster as the	parameters (spectrum
	monoisotopic peak	data only)” on page 3-26.

Data Explorer™ Software User’s Guide 9-21