User`s guide

Acquiring in Automatic Mode from the Instrument Control Panel
Voyager
™
Biospectrometry
™
Workstation User’s Guide 6-41
6
Table 6-3 Spectrum Acceptance Criteria Parameters
Parameter Description
Acceptance Criteria
Minimum Signal
Intensity
(spectrum acceptance
and laser adjustment)
Sets the minimum signal intensity accepted for the most
abundant peak (local base peak) within the mass range of
interest.
Also used to determine laser adjustment. When the
system adjusts the laser, it checks that the signal intensity
is above the minimum specified. If signal intensity is not
above the minimum, the system increases the laser
intensity. If signal intensity is not above the minimum
when the laser is at the highest setting specified in
Automatic Control, the system moves to the next search
pattern position.
Maximum Signal
Intensity
(spectrum acceptance
and laser adjustment)
Sets the maximum signal intensity for the most abundant
peak (local base peak) within the mass range of interest.
Also used to determine laser adjustment. When the
system adjusts the laser, it checks that the signal intensity
is below the maximum specified. If signal intensity is not
below the maximum, the system decreases the laser
intensity. If signal intensity is not below the maximum
when the laser is at the lowest setting specified in
Automatic Control, the system moves to the next search
pattern position.
Signal-to-Noise
(spectrum acceptance
and laser adjustment)
Enables or disables the signal-to-noise filtering. Type the
signal-to-noise ratio threshold. Spectrum is rejected if the
base peak has a ratio below this value.
The base peak in the specified Mass Range is used to
calculate signal. The noise is calculated over the Baseline
Range specified (see below).
Continued