Instruction manual

Guppy Technical ManualV7.4.0
131
Description of the data path
Single knee point vs. two knee points
Single knee point operation means: Only one knee point can be controlled. The
following diagram (left) shows the situation for a single knee saturation control
in auto knee-adjust mode.
Two knee point operation means: Two knee points can be controlled. The fol-
lowing diagram (on the right) shows the situation for a two knee point control
in auto knee-adjust mode.
Figure 85: Single knee situation (left) and two knee point situation (right)
Note

The auto knee-adjust mode tries to keep the total shutter width
to the maximum 480 rows in order to achieve the highest
dynamic range.
Storage control
Saturation control
Shutter Width 1
V1
V2
V4
Total Shutter Width
Final saturation
level set by V2
Saturation level
set by V1
level set by V2
Integration time
Sensor output
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Storage control
Saturation control
Shutter Width 1
V1
V2
V4
Total Shutter Width
Final saturation
Saturation level
set by V1
level set by V3
Integration time
Sensor output
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Saturation level
set by V2
V3
Shutter Width 2
Frame Valid Frame Valid
Vertical Blanking
interval
Vertical Blanking
interval