SP-5000M-PMCL / SP-5000C-PMCL
- 67 -
8.7 ALC
In the SP-5000-PMCL, 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.
In order to make the ALC function effective, set the Auto Iris Lens Control Signal Output to “ON”.
The auto iris function works 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.44 ALC function concept
ALC Reference will determine the target video level for AGC, Auto Shutter and/or Auto iris. For
instance, if ALC Reference is set to 100% video level, AGC, Auto Shutter and/or Auto iris will
function to maintain 100% video level.
8.8 HDR (High Dynamic Range) (SP-5000M-PMCL only)
HDR sensing mode can be set when HDR Mode is set to ON while Exposure Mode is Timed.
The parameters to configure dynamic range are HDR_SLOPE Level 1, Level 2, Level 3 and Level 4.
The user can select any one of those parameters as required for their application.
In this mode, the timed exposure is used as the reference and the value selected in
HDR_SLOPE will compensate to get an appropriate dynamic range by changing the exposure
time.
Notes:
1.
If the exposure mode is OFF and the HDR mode is set to ON, the exposure mode is
automatically changed to Timed.
2.
If horizontal binning and/or vertical binning are set to ON, the HDR mode cannot be set.
In this case, the HDR mode must be set first before H-Binning and/or V-Binning are set.
3.
In this mode, exposure overlapped behavior is not available and the frame rate is slower than
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