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EL-2800M-GE2 / EL-2800C-GE2
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8.8.3.3 Focus+
Near: While this command is supplied, the focus will continue to shift closer to the
camera.
Far: While this command is supplied, the focus will continue to move towards infinity.
Stop: When this command is supplied, the focus operation stops.
8.8.4 Exclusive video output signal for iris control
This signal can be used for automatic lens iris control in Continuous and RCT modes.
This signal is available if AUX Type 2 connector is used for AUX (Factory option).
The iris video signal is composed to average the video level in the center area of each frame and can
be output as a composite signal with H-sync.
The following drawing shows the waveform of the iris control video signal. This signal is output with
the same video level within the same frame and the average is recalculated with each new frame.
Fig. 52 Iris video output signal
The following parameters of this auto iris control signal output can be changed.
Auto Iris Control Signal Output:
ON: The auto iris control can be connected with AGC and ASC as ALC function
OFF: The auto iris control is not connected with AGC and ASC.
Iris State Control:
Video: Use the iris control in auto mode.
Close: Force the iris to close.
Open: Force the iris to open.
8.9 ALC
In the EL-2800M-GE2 and EL-2800C-GE2, 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