Voyager DP-263-S Betriebsanweisung Seite 283

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Impact of Changing Instrument Settings Parameters
Voyager
Biospectrometry
Workstation User’s Guide 5-53
5
Input Bandwidth
(not available with
Signatec
digitizers)
Decreasing the Input Bandwidth decreases the response time
of the detector, and can reduce higher frequency noise. A
lower setting can improve resolution and smooth out a
baseline, but may also decrease signal-to-noise ratio.
Because the Input Bandwidth is an electronic analog filter, it
may slightly shift peak centroids toward higher masses relative
to peaks recorded with Full Bandwidth.
Suggested settings
Use the settings listed below as a starting point for Input
Bandwidth. Adjust as needed to eliminate noise.
NOTE: To maintain signal-to-noise ratio, use a lower Input
Bandwidth setting.
NOTE: Settings below 200 in Linear mode may not allow
resolution of isotopes.
Mass Range
(Da)
Input Bandwidth
Linear Mode Reflector Mode PSD Mode
0–500 Full Full 200–250 MHz
or 20–25 MHz
on PSD
segments
below 0.3
Mirror Ratio
500–6,000 200–250 MHz Full
6,000–50,000 200–250 MHz 200–250 MHz
>50,000 20–25 MHz 20–25 MHz
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