In the Data Viewer application, when I choose "Total" on the right hand side (instead of "Peak"), the display shows a scrolling list of numbers in blue (labeled "Activity") that represent the count per second. There is also a scrolling list of characters ("S" in all cases for me) in pink, whose corresponding label at the top right of the plot says "Type." What does "Type" mean? What does a type of "S" mean? What other characters might show up besides "S," and what do those characters mean? Thanks.

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