Spectrum Techniques ICS-PCI, User Manual

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Background Subtraction
Background Subtract...
This is a special case of spectrum stripping. The detector background is stored in the background buffer, usually for a long
collection time. When background subtract is executed, the livetime fraction of the background spectrum is automatically
subtracted from the contents of the master buffer. This provides a convenient method of removing naturally occurring
background from a sample spectrum and can be very useful when working with low level environmental samples.
Smoothing
Smooth Data...When executed, smoothing performs a 3-point averaging of the data currently being displayed. The
function uses the following algorithm to average data in each channel.
(n-1)+(n)+(n+1) .
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Overlay
Overlay...allows the user to turn the Overlay function on/off. Click on Overlay to check or uncheck the function.
Overlay Buffer...The Overlay storage buffer may be superimposed over the Master Buffer for visual comparison.
Overlay File...Stored spectrum files may be opened into the Overlay Buffer and may be superimposed over the Master
Buffer for visual comparison.