Applied Biosystems Data Explorer 4 Series User Manual page 102

Chapter 3 Peak Detection and Labeling
3
Detection ranges
Number
of data points
Figure 3-1 Example Detection Ranges Calculated by Software Based on Number
3-4 Applied Biosystems
The software uses the following formula to calculate the
expected number of data points in a peak:
Expected
number of
data points
Where:
Mass resolution is a user-defined value.
Data-type-dependent defaults are provided, but can be overwritten.
Bin size is an instrumental constant:
·
For Mariner data, Bin size = 1 ns.
·
For Voyager data, Bin size is variable based on
the digitizer used and the mass range acquired.
Figure 3-1 is an example of the resolution-based detection
ranges automatically calculated by the software.
41 47 53 59 65
of Data Points Per Peak
Flight time
to which the
= data point corresponds
(2 × mass resolution × Bin size)
71 77 83