
Chapter 6 Acquiring Mass Spectra
6-52 PerSeptive Biosystems
6
Acquisition mode
Acquisition mode starts after Prescan mode determines the
laser setting, or immediately if Prescan mode is disabled.
NOTE: Each time the system begins acquiring in
Acquisition mode, it acquires the number of
Shots/Spectrum specified in the Instrument Settings control
page.
In Acquisition mode, the system does the following:
1. The system sets the laser to one of the following and
acquires spectra:
• If Prescan At First Search Pattern Position
Only is enabled—Uses the laser setting and
search pattern file position determined in “Prescan
mode” on page 6-49 and acquires spectra.
• If Prescan At Each Search Pattern Position is
enabled—Uses the laser setting and search
pattern file position determined in “Prescan mode”
on page 6-49 and acquires spectra.
• If Prescan mode is not enabled—Sets laser
halfway between the minimum and maximum
specified in the Automatic Control Settings dialog
box. Starts acquiring data at the first point
specified in the search pattern file.
If the signal intensity is:
• Too high—The system decreases the laser
setting one laser step as specified in Automatic
Control dialog box, and acquires a new spectrum.
• Too low—The system increases the laser setting
one laser step as specified in Automatic Control
dialog box, and acquires a new spectrum.
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