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142 WinView/32 Manual Version 2.4.M
file. Once the file is collected and stored, enter the filename in the Background Subtract
filename box on the Experiment Setup Data Corrections tab page (see Figure 125).
Setting automatic background subtraction
These steps instruct the software to automatically subtract a previously stored
background file from each new data acquisition.
➧ Select Experiment Setup from the Acquisition menu. This will open the Experiment
Setup dialog box.
➧ Click on the Data Corrections tab. The Data Corrections tab page will be selected
(Figure 125).
➧ Click on the Background checkbox to turn on background subtraction. Type in the
name of a background file if it is in the current directory. Alternatively, click on the
button at the end of the entry window to open the file browser to select the
background file if it is in a different directory.
➧ Once the Background filename has been entered, click on the OK button. This saves
the background filename for all future data acquisitions, or until the Background is
turned off.
The filename entered in the Background box will be subtracted from each new file
before it is displayed or stored. If both Flatfield and Background are selected, the
background will be subtracted first, before the flatfield correction.
Background Subtraction with Intensified Detectors
To properly perform background subtraction with an intensified detector, a new
background must be acquired whenever the intensifier gain setting is changed. This is
necessary be changing the intensifier gain also affects the dark charge of the intensifier
(EBI).
Figure 125.
Data
Corrections tab
page.