
Guidelines for Acquiring
Voyager
™
Biospectrometry
™
Workstation User’s Guide I-3
I
I.1 Guidelines for Acquiring
Consider the following as you acquire a spectrum and use the
oscilloscope:
• When you start acquiring, you should see a signal that
contains matrix peaks and sample peaks.
• Make sure the full range of the signal is displayed.
Brackets must overlap the end range markers (see
Figure I-3). If brackets do not overlap, turn the
Horizontal Scale and Horizontal Position knobs until the
left bracket overlays the left marker.
• Start with a high laser power to saturate the initial
signal. This is a good starting point from which you can
determine the laser threshold or the appropriate laser
setting for your application.
You may need to move the signal up using the Vertical
Position or the Vertical Scale knobs so that you can see
the tops of the peaks.
• If peak intensity of the final scan is near maximum
intensity (Input range 50, 200, or 1000 mV), it is very
possible that some scans averaged in to the final scan
are saturated. Reacquire using a lower laser power.
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