Service Manual 21
CRANEX
®
Novus e 2. Unit Description
Radiation striking the CCD sensor is converted to vis-
ible light which is detected by the CCD cell. A binning
procedure is carried out on individual pixels, i.e. two ad-
jacent pixels in a row and column (2 x 2 binning) forms
one large pixel (96μm x 96μm). The output voltage of
the CCD is fed to a 14-bit A/D converter.
The CCD sensor board sends the image data (now 12
bits) to the CPU board where they are saved on the
SDRAM. The image information is transferred to the PC
via the Ethernet cable.
In the PC there is a Network Interface Card (NIC). After
image data transfer the DSD preprocesses the raw
image, for example it interpolates gaps between CCD
chips, and carries out dark current correction and gain
correction (the pixels do not have equal characteristics).
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