GammaVision
®
v7 (A66-BW) 783620H / 1013
If the horizontal scale is expanded, when the marker reaches the edge of the spectrum window, the next key press past the edge shifts the window to the next block of channels in that direction such that the marker is now in the center of the display.
When the ROI mode is set to Mark, the <
6
>/<
7
> keys cause the channels to be marked as the marker moves. Similarly, they clear the ROI bits while the ROI mode is UnMark. (See
Section 5.8.)
9.2.2. Next/Previous ROI <Shift +
6
>/<Shift +
7
>
The <Shift +
6
> or <Shift +
7
> move the marker to the beginning of the next higher channel
ROI, or the end of the preceding ROI, respectively, of the displayed spectrum. These functions are duplicated by the ROI indexing buttons on the Status Sidebar.
9.2.3. Next/Previous Peak <Ctrl +
6
>/<Ctrl +
7
>
The <Ctrl+
6
> and <Ctrl+
7
> keys perform a peak search on the spectrum in the higher or lower channel direction, respectively, and move the marker to the first peak found. If no peak is found, the program displays the “Can’t find any more peaks!” message and the marker does not move. If the spectrum is energy-calibrated and the library loaded, the system displays the best match from the library within two FWHMs of the peak centroid. If there is no match within this range, the “No Close Library Match” message is displayed. These functions are duplicated by the Peak indexing buttons on the Status Sidebar.
9.2.4. Next/Previous Library Entry <Alt +
6
>/<Alt +
7
>
These keys move forward or backward through the nuclide library to the next closest library entry. Each button press advances to the next library entry and moves the marker to the corresponding energy. Also, instead of indexing from a previously identified peak, the marker can be positioned anywhere in the spectrum and these keys used to locate the entries closest in energy to that point. If a warning beep sounds, it means that all library entries have been exhausted in that direction, or that the spectrum is not properly calibrated for reaching the energy with the marker.
In any case, if an appropriate peak is available at the location of the marker, data on the peak activity are displayed on the Marker Information Line. These functions are duplicated by the
Library indexing buttons on the Status Sidebar.
9.2.5. First/Last Channel
These keys move the marker to the first or last channel of the spectrum.
<Home>/<End>
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