Справочник Пользователя для Sigma LBA-710

The PAN command is affected by the current capture resolution (zoom).  Use the :PAN? 

command to retrieve the current capture window location and  resolution.  The capture resolution 

value is coded as a power of two.  A capture resolution value of 0 represents 2

0

 which equals 1, a 

value of 1 represents 2

1

 = 2, 2 represents 2

2

 = 4, etc.  When the capture resolution is x1, x2, x4, 

etc., the LBA-PC samples every pixel, every other pixel, every 4th pixel, etc.  If the current frame 

size is 64 X 60 then the area covered by the capture window is actually 64 X 60, 128 X 120, 256 

X 240, etc.  To determine the actual size of the capture window, multiply the capture size by the 

capture resolution. 
The upper left corner of the pan window must be placed on an integer multiple of the capture 
resolution starting from the upper left corner of the pan window limit.  For example, if the left 

edge of the pan window limit is at 112 and the capture resolution is x8 then the left edge of the 

pan window must be placed at 112, 120, 128, etc.  Illegal values will be truncated to the next 

lower integer multiple. 
The following describes how to center the pan window in the detector.  In this example the 

horizontal center of the detector is at (112+744)/2=428 and the vertical center is at 
(32+512)/2=272.  The frame data size is 128 X 120.  The capture resolution value is 1, so we 

must multiply the data size by 2

1

=2.  Therefore, the actual size of the capture window is 256 X 

240.  To put the capture window center at the detector center we subtract half the capture 

window size, 428-128=300 and 272-120=152. 
Host sends 

 :PNW?(^END) 

 
LBA-PC sends 
 

PNW 

 UpperLeft=112,32; 
 LowerRight=744,512(^END)

 

 
Host sends 
 

:PAN?(^END) 

 
LBA-PC sends 
 

PAN  

 CaptureLoc=112,32; 
 CaptureSize=128,120; 
 CaptureResolution=1(^END)

 

 
Host sends 
 

PAN 

 X=300; 
 Y=152(^END)

 

Operator’s Manual 

 

LBA-PC 

 

Doc. No. 10654-001, Rev 4.10 

203