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The 'Scan Speed' selection menu programs the hardware to use a particular setting (one of eight) of the gated integrators for image collection. There are 3 routines that allow the user to change dwell time (which, along with collection resolution) determines the scan speed. This routine (Scan Speed) seems to be the most intuitive and is therefore preferred for most situations. In general, when a new scan speed (pixel dwell time) is selected, that dwell time will be used for all subsequent image collection and sampling algorithms until a new speed is selected. This applies to all the tools for selecting Scan Speed. When the Scan Speed selector, 8 images are scanned in from fastest to slowest. The fastest scan speed is at the upper left, the slowest at lower right. Scan speed increases from left to right and the top 4 images are the 4 fastest scan speeds, the bottom row the slowest. At any time, the user can click the mouse and select a new scan speed based on the amount of noise perceptible in the image. The slowest scan speed will always produce the most noise free image, however; a very satisfactory amount of noise reduction (beyond the point of perceptibility) can usually be obtained with a significantly faster scan speed.
The current scan speed will be highlighted in red. Just click the mouse on an image to select a new scan speed. Tip: in general, if frame averaging is to be used (to prevent charging or sample damage) the fastest scan speed should be selected. Also see the MiniScan and LineScan menus for additional tools to select scan speed. |
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DIGISEMTM and
DRV-2000TM are a registered
trademarks of ELMDAS Company.
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