
Chapter 5 Optimizing Instrument Settings
5-36 PerSeptive Biosystems
5
Accumulation
Conditions
The following Accumulation conditions create one data
file that contains one spectrum:
• Accumulate all—All spectra acquired are
accumulated into one .DAT file. One spectrum is
acquired from a search pattern position*. The
number of search pattern positions analyzed (and
therefore the number of spectra accumulated) is
equal to the Number of Spectra to Acquire, even if
the number of positions in the search pattern is
larger. All search pattern positions may not be
analyzed. Acceptance criteria are not used.
Example: If Number to Acquire=5, Number of
positions in .SP=20, 5 positions analyzed, one .DAT
created. If Number to Acquire=25, Number of
positions in .SP=20, 20 positions analyzed, one .DAT
created.
• Accumulate all passing—Each spectrum that
meets the specified acceptance criteria is
accumulated into one data file. Acquisition is
performed on the same search pattern position* until
Acceptance Criteria fail. Acquisition continues until
the Number of Spectra to Acquire have been
acquired. All search pattern positions may not be
analyzed.
NOTE: In this mode, acquisition moves to the next search
pattern position only if acceptance criteria fail.
* If Use Automated Sample Positioning is disabled, acquisition is performed on the positions you
manually select.
Table 5-10 Automatic Control Parameters—Spectrum Accumulation (Continued)
Parameter Description
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