
Chapter 6 Acquiring Mass Spectra
6-42 PerSeptive Biosystems
6
3. Click OK to close the Spectrum Acceptance Criteria
dialog box.
4. Click OK to close the Automatic Control dialog box.
Saving the
instrument
settings (.BIC) file
From the File menu in the Instrument Control Panel, select
Save Instrument Settings.
All instrument settings, including Automatic Control mode
setting, Spectrum Acceptance Criteria, and Laser Intensity
Adjustment Criteria are saved.
Signal-to-Noise
(spectrum acceptance
and laser adjustment)
(continued)
Also used to determine laser adjustment. When the
system adjusts the laser, it checks that the signal-to-noise
ratio is above the value entered. If it is not, the system
increases the laser intensity. If signal-to-noise ratio is not
above the specified value when the laser is at the highest
setting specified in Automatic Control, the system moves
to the next search pattern position.
Resolution Enables or disables the resolution filtering. Type the
resolution threshold. Spectrum is rejected if the base
peak has a resolution below this value.
Resolution is measured at 50 percent of the most intense
peak in the specified mass range.
Criteria Evaluation
Mass Range
Specifies the mass range to evaluate.
Signal-to-Noise
Baseline Range
Mass range in which to calculate noise, if Signal-to-Noise
is enabled above.
Table 6-3 Spectrum Acceptance Criteria Parameters (Continued)
Parameter Description
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