Instruction manual

Guppy PRO Technical ManualV4.1.0
223
Configuration of the camera
When both auto shutter and auto gain are enabled, priority is given to increas-
ing shutter when brightness decreases. This is done to achieve the best image
quality with lowest noise.
For increasing brightness, priority is given to lowering gain first for the same
purpose.
MinValue and MaxValue limits the range the auto shutter feature is allowed to
use for the regulation process. Both values are initialized with the minimum and
maximum value defined in the standard SHUTTER_INQ register (multiplied by
the current active time base).
If you change the MinValue and/or MaxValue and the new range exceeds the
range defined by the SHUTTER_INQ register, the standard SHUTTER register will
not show correct shutter values. In this case you should read the EXTEND-
ED_SHUTTER register for the current active shutter time.
Changing the auto shutter range might not affect the regulation, if the regula-
tion is in a stable condition and no other condition affecting the image bright-
ness is changed.
If both auto gain and auto shutter are enabled and if the shutter is at its upper
boundary and gain regulation is in progress, increasing the upper auto shutter
boundary has no effect on auto gain/shutter regulation as long as auto gain reg-
ulation is active.
Register Name Field Bit Description
0xF1000360 AUTOSHUTTER_CTRL Presence_Inq [0] Indicates presence of this
feature (read only)
--- [1..31] Reserved
0xF1000364 AUTOSHUTTER_LO --- [0..5] Reserved
MinValue [6..31] Minimum auto shutter value
lowest possible value: 10 μs
0xF1000368 AUTOSHUTTER_HI --- [0..5] Reserved
MaxValue [6..31] Maximum auto shutter value
Table 138: Advanced register: Auto shutter control
Note

• Values can only be changed within the limits of shutter
CSR.
• Changes in auto exposure register only have an effect
when auto shutter is enabled.
• Auto exposure limits are: 50..205 (SmartViewCtrl1
tab: Target grey level)