GammaVision
®
v7 (A66-BW) 783620H / 1013
11) Supplementary Information Line, below the Marker Information Line, used to show library contents, the results of certain calculations, warning messages, or instructions.
4.2. Spectrum Displays
The Full and Expanded Spectrum Views respectively show a complete histogram of the current spectrum (whether from a Detector or the buffer) and an expanded view of all or part of the spectrum. These two windows are the central features of the GammaVision screen. All other windows and most functions relate to the spectrum windows. The Display/Preferences menu lets you adjust the color and fill type of the various spectrum features (e.g., background, spectrum, ROIs).
! Full Spectrum View — This view is embedded in the Expanded Spectrum View, and shows all channels of Detector data memory as configured with the MCB Properties... command on the Acquire menu. It includes a rectangular area showing the portion of spectrum currently displayed in the Expanded View, and a data acquisition mode indicator (refer to item 8 on the preceding page). The vertical scale in the Full Spectrum View is always logarithmic.
! Expanded Spectrum View — The Expanded Spectrum View contains a reverse-color marker line at the horizontal position of the pixel representing the marker channel. This marker can be moved with the mouse pointer, as described in Section 4.4.1, and with the
<
7>/<6> and <PgUp>/<PgDn> keys. Information about the marked channel is displayed on the Marker Information Line.
— Use the menu commands, accelerator keys, and toolbar buttons to choose between logarithmic and linear scales, zoom in and out, and select which region of the spectrum to view.
— You can also zoom in to any horizontal and vertical scale with the click-and-drag
rubber rectangle tool (see Section 4.4.3). The baseline or “zero level” at the bottom of the display can also be offset with this tool, allowing the greatest possible flexibility in showing the spectrum in any detail.
— Note that the marker can be moved by no less than one pixel or one channel (whichever is greater) at a time. The <
6> and <7> keys make it easy to perform these small changes. If true single-channel motions are required, you must zoom in on the desired portion of the spectrum until a single press of the <
6> and <7> keys changes the readout on the Marker Information Line by one channel or one energy unit (e.g., keV).
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