User guide

LBA-USB User Guide Document No: 11294 Page 61

Cursor Orientation

The Cursors can be orientated to align with either the X/Y axial directions, or

with the computed Major/Minor axial directions.

Note: Elliptical computations must be active in order to permit the Major/Minor

orientations to operate correctly. Otherwise it will revert to the X/Y operating

mode.

Origin Location

The beam display window always includes an X/Y origin from which all other

positional data is referenced. A red dot visible in the Pan/Zoom window indicates

where the Origin location is set. The operator can choose one of four defaults, or

manually locate the origin:

 Detector UL – The origin will be the upper left-hand corner of the camera

detector as referenced in the display Pan/Zoom window.

 Detector LL – The origin will be the lower left-hand corner of the camera

detector as referenced in the display Pan/Zoom window.

 Window UL – The origin will be the upper left-hand corner of the ROI as

referenced in the display Pan/Zoom window.

 Window LL – The origin will be the lower left-hand corner of the ROI as

referenced in the display Pan/Zoom window.

Note: In the first two selections, the Origin is absolutely referenced to the camera

detector, and thus the Pan window moves over the coordinate system just as the

cursors do. In the last two selections the Origin is located only with respect to the

Pan window, thus the Origin moves relative to the detector as the Pan window is

moved.

Manual origin locations are always absolutely referenced to the camera detector

(see note above). To manually place the origin, switch to the 2D display mode

and enable the cursors. Move the cursors to the desired Origin location, and then

double click the right mouse button. Observe that the X and Y cursor locations

now display zeros. Also observe that the Pan/Zoom window’s red dot is in the

approximate Origin location inside the ROI.

Note:

If the Origin is set to Manual, and the Crosshair is set to Origin, then the

Origin may be dragged and dropped by moving the Crosshair.