
Chapter 7 PSD Analysis
7-34 PerSeptive Biosystems
7
During
acquisition
The following occurs:
• Mass range for the segment is set to:
• Acquisition starts.
• All instrument settings except Shots/Spectrum are
disabled. Settings remain inactive until you stop
the PSD experiment after you acquire all
segments of interest.
• Acquisition of the segment continues until the
number of Shots/Spectrum specified in Spectrum
Acquisition on the Instrument Settings control
page is collected, or until you select Stop
Acquisition from the Acquisition menu.
• The spectrum is displayed in the Current Trace in
the Spectrum window.
Changing
settings
During acquisition, you can vary laser intensity,
parameters in the segment list, and Shots/Spectrum.
Mass Equivalent to
Start (Precursor mass/4)
which is equal to
(Precursor flight time/2)
End (Mirror to Accelerating Voltage Ratio
2
x
Precursor mass)
which is equal to
(Mirror to Accelerating Voltage Ratio x
Precursor flight time)
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