
Chapter 6 Acquiring Mass Spectra
6-50 PerSeptive Biosystems
6
In Prescan mode, the system does the following:
1. The system sets the laser to the maximum setting
specified in the Automatic Control dialog box and
acquires a spectrum. The system starts acquiring data
at the first point specified in the search pattern file
(described in “Search pattern files” on page 6-44).
If the signal intensity is:
• Too low (lower than the minimum signal intensity
set in the Spectrum Acceptance Criteria dialog
box) with the laser at maximum—The system
moves to the next step specified in the search
pattern file and acquires again.
NOTE: If Use Automated Sample Positioning is
disabled, the system always uses the center of the
sample position.
• Too high (higher than the maximum signal
intensity set in the Spectrum Acceptance Criteria
dialog box) with the laser at maximum—The
system continues with step 2.
NOTE: If no minimum or maximum signal intensity
criteria is specified, the laser is not adjusted. The
mid-range laser setting specified in the Automatic
Control dialog box is used.
• Within range—The system begins acquiring in
Acquisition mode. See “Acquisition mode” on
page 6-52.
Comentarios a estos manuales