Sigma LBA-300 Manuale Utente

 

Operator’s Manual 

 

LBA-PC 

 

200

color or gray scale and displayed in the beam window. 

 FrameNumber=52; 
 

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To retrieve the current pass/fail status, you must send the PFS? command. 
The LBA-PC responds by repeating PFS followed by a “key=value” parameter for each value that has 
pass/fail testing enabled.  The ‘key’ is an ASCII text string identical to the label displayed in the left-

hand column of the results window.  The ‘value’ is a boolean, where 0 equals fail and 1 equals pass. 
The following example describes how the host controller retrieves the current pass/fail testing status.  

Total, Peak, Centroid X, and Centroid Y are being tested.  Total passed, Peak failed, Centroid X failed, 

Centroid Y passed. 
Host sends   
 

:PFS? 

 
LBA-PC sends 

 

 

PFS  

 Total=1; 
 Peak=0; 
 Centroid 

X=0, 

 Centroid=1(^END)

 

 

The visible spatial coordinate system of the LBA-PC is called world coordinates.  World coordinates are 

used for computed centroid location and peak location, aperture location, cursor and crosshair 
location, and pass/fail centroid and peak locations.  World coordinates are defined by the Origin 

Location, ‘Lens’ setting, and Pan Location.  The world coordinates system is the only coordinate 

system that is used when using the LBA-PC in the local, non-remote mode. 
When operating the LBA-PC remotely, you must be aware of two other coordinate systems called 

detector and frame coordinates.  Detector coordinates are represented on the LBA-PC display by the 

Pan/Zoom window.  Detector coordinates are used to describe the active pixels of the camera 
detector.  Frame coordinates are used to describe the frame data stored in the frame buffer. 
The figure below shows the relationship between the Pan/Zoom window, the capture window, frame 

data, and the Beam display window.  The Pan/Zoom window represents the active area of the camera 

detector.  The capture window, represented in the LBA-PC display by the dark gray square inside the 

Pan/Zoom window, represents the location and size of the area of the detector that will be digitized.  

The digitized data is placed in the frame buffer.  Data in the frame buffer is then converted to false