Ocean Optics EMBED2000+ - Manual (Page 4)

EMBED2000+ Data Sheet
4 029-20000-005-05-201305
Internal Operation
Pixel Definition
A series of pixels in the beginning of the scan have been covered with an opaque material to
compensate for thermal induced drift of the baseline signal. As the EMBED2000+ warms up, the
baseline signal will shift slowly downward a few counts depending on the external environment. The
baseline signal is set between 1900 and 2000 counts at the time of manufacture. The following is a
description of all of the pixels, both as they exist on the hardware device and as they are actually read
from the FPGA.
Pixels on the Device
Pixel Description
0–17 Not usable
7–24 Optical black pixels
25–26 Not usable
27–2074 Optical active pixels
Note that the EMBED2000+ only digitizes pixels 7 through 2054. During readout the first pixel is the
first optical black pixel.
CCD Detector Reset Operation
At the start of each integration period, the detector transfers the signal from each pixel to the readout
registers and resets the pixels. The total amount of time required to perform this operation is ~3
µs.
When using trigger mode the user needs to account for this time delay when the pixels are optically
inactive.