User`s guide

Optimizing Instrument Settings Parameters
Voyager
™
Biospectrometry
™
Workstation User’s Guide 5-81
5
Figure 5-20 Low Mass Gate Spike
The spike occurs at a time that corresponds to just below the
Mass for the Low Mass Gate entered in the .BIC file. For
example, if the Mass is set to 400 Da, you would see the spike
at approximately the time that corresponds to 370 Da.
You can identify the Low Mass Gate spike by its sharp lift-off,
its narrow width, and the noise as it returns to baseline.
Eliminating Low
Mass Gate spike
when acquiring
You can eliminate the Low Mass Gate spike from the data by
setting the Mass for acquisition slightly higher than Low Mass
Gate Mass.
Eliminating Low
Mass Gate spike
after acquiring
You can eliminate the Low Mass Gate spike after you acquire
by using the Truncate Spectrum function in the Data Explorer
software to eliminate the Low Mass Gate spike. For
information, see the
Data Explorer Software User’s Guide ,
Section 5.9, Truncating a Spectrum.
Low Mass Gate spike