HP Data Explorer 4 manual 345

									Displaying PSD Data
			If you are performing an internal standard calibration, the
			software determines the constants as listed below:
		PSD Internal			Constant			Value Used
		Standard Calibration
		One-point			α			Calculated from standard mass
					β	and γ		0
		Two-point or			α	and β		Calculated from standard masses
		three-point
					γ			0
		More than three-point			α, β, γ			Calculated from standard masses
	Region of The composite spectrum is generated from portions of the									8
segments included			segment traces. The upper mass limit of the composite region
in composite			in each segment is determined by the PSD Mirror Ratio (Rn)
	spectrum		with which the segment was acquired and the mass of the
			precursor ion (mp) (Figure 8-3).
	Seg 1								included in composite
						included in composite
	Seg 2
	Seg 3			included in composite					R1 x mp
									(If first segment acquired
								R2 x mp with PSD Mirror Ratio=1.0,
	Seg 4								upper limit is
									slightly higher than
									precursor ion mass)
						R3 x mp
Figure 8-3 Portions of Segment Traces Included in the Composite Spectrum

Data Explorer™ Software User’s Guide 8-7