Voyager DP-263-S Guide de l'utilisateur Page 441

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Exploring PSD Mode
Voyager
Biospectrometry
Workstation User’s Guide 7-37
7
7.4.1 Observing the
Effects of Laser Intensity
Adjusting laser intensity affects fragment ion production and
signal intensity.
In this section
In this section, you will:
Observe the effects of setting the laser intensity too high
and too low
Determine the laser intensity for your system that yields
the best signal for PSD spectra
Observing effects
of high and low
laser intensity
To observe the effects of laser intensity:
1. Open the Angiotensin_PSD.BIC file provided.
2. In the PSD segment list, select the first row with a Mirror
Ratio setting of 1.0.
3. Acquire a spectrum.
4. Observe the 1,180 to 1,190 Da mass region for the
fragment ion cluster typically seen for angiotensin I
(Figure 7-9).
Figure 7-9 Angiotensin I Fragment Ions (Precursor Ion Selector On)
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