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on opening of URSA-II MCA, at the start of each acquisition, and about every second or two during an
acquisition. This value is not updated at any other time, i.e. when the URSA-II is sitting idle. If the voltage
drops below 10 V a warning will be displayed, and at 9.5 V a message will be shown that the battery condition
is now critical and batteries should be replaced immediately.
New User Hints Bar
If “Show New User Hints” has been enabled in the View menu, a sentence or two appears here that briefly
describes the function for any display or control the mouse cursor is currently over. Spectrum Display
Spectrum Display
This area graphically displays the spectrum data collected. This area can be zoomed by using and clicking the
mouse and “dragging a box” around the area of interest, from upper left down to lower right. This will not
work if the starting or ending points of the box are outside the Spectrum Display area. Once a spectrum is
zoomed, it can be panned by rightclicking the mouse on the spectrum display and dragging it. Un-zoom by
dragging a box (any size) anywhere on the spectrum display from lower right up towards the upper left.
Spectrum Status Bar
This section along the bottom of the main URSA-II MCA window displays information about the displayed
spectrum, whether currently acquiring or not, and whether or not the spectrum has been loaded to a file.
This display reflects no information about any secondary spectrum that is displayed.
The first group of three boxes (towards the left) reflect data for the individual channel over which the mouse
cursor is located. These are the channel number, the energy associated with that channel (only if an energy
calibration has been performed), and the number of counts in that particular channel. If a background
spectrum has been loaded, the count displayed will reflect the background-subtracted counts if “Show
Background Subtracted” has been selected under the “View” menu.
The second group of two boxes (in the center) shows data for whatever ROI the cursor is over, if an ROI set
