JAI AM-800GE, User Manual

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AM-800GE / AB-800GE
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11. Other functions
11.1. ALC
In the AM-800GE and AB-800GE, auto gain, auto shutter and auto iris functions can be
combined to provide a wide ranging automatic exposure control from dark to bright or
vice versa.
The functions are applied in the sequence shown below and if one function is disabled,
the linkage between the other two is maintained.
To include auto iris in the ALC function,
set the Auto Iris Lens Control Signal Output to “ON”. The auto iris function (AIC) will
then work together with AGC and Exposure Auto.
If the lighting condition is changed from bright to dark AIC ― ASC ― AGC
If the lighting condition is changed from dark to bright AGC ― ASC ― AIC
Fig.51 ALC function concept
GainAutoReferecne will determine the target video level for AGC, Auto Shutter
and/or Auto iris. For instance, if GainAutoReference is set to 100% video level, AGC,
Auto Shutter and/or Auto iris will function to maintain 100% video level.

Please note that ALC function is available only for the continuous mode.
11.2 Black level control
This function adjusts the setup level.
This can be adjusted from -256 to 255 LSB in the 10bit output.
Gain is fixed at Min.
Dark Light changes Bright
Auto Shutter
Max
Auto shutter operation
Max ～ Min (User set)
Auto Shutter
fixed at Min
Iris diaphragm fixed (Open)
Auto iris
operation
AGC works:
Auto shutter works:
Auto iris works:
AGC operation
Max ～ Min (User set)
AGC
Max
Iris stops just
before close
Operation if light changes
from dark to bright
Operation if light changes
from bright to dark