ALLIED Vision Technologies Guppy F-503 - Manual (Page 272)

Configuration of the camera
GUPPY Technical Manual V7.1.0
272
MinValue and MaxValue limits the range the auto shutter feature is allowed
to use for the regulation process. Both values are initialized with the mini-
mum and maximum value defined in the standard SHUTTER_INQ register
(multiplied by the current active timebase).
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
EXTENDED_SHUTTER register for the current active shutter time.
Changing the auto shutter range might not affect the regulation, if the reg-
ulation is in a stable condition and no other condition affecting the image
brightness 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 regulation is active.
Auto gain control
The table below illustrates the advanced register for auto gain control.
Note

As with the Extended Shutter the value of MinValue and
MaxValue must not be set to a lower value than the minimum
shutter time.
Register Name Field Bit Description
0xF1000370 AUTOGAIN_CTRL Presence_Inq [0] Indicates presence of this
feature (read only)
--- [1..3] Reserved
MaxValue [4..15] Maximum auto gain value
--- [16..19] Reserved
MinValue [20..31] Minimum auto gain value
Table 123: Advanced register: Auto gain control
Note

• Values can only be changed within the limits of gain
CSR.
• Changes in auto exposure register only have an effect
when auto gain is active.
• Auto exposure limits are 50..205.