Cheetah Pregius Camera with Camera Link
–
User Manual
July 6, 2018
Page
46
of
64
Rev 1.1
The camera starts by changing the gain within the specified min-max limits.
•
If reaching one of the gain limits, the camera indicates the limit has been reached
and maintains this value until the light condition change. You can set the speed
of convergence from four possible options.
•
If enabling AEC mode and AGC mode together, the camera starts by changing the
exposure first within the specified min-max limits until the maximum exposure
limit is reached.
•
Upon reaching the maximum exposure limit, the camera adds gain and changes it
within the specified min-max limits.
The AEC/AGC algorithm samples all pixels for the entire frame, but you can select only a
portion of the image (AOI) to calculate the luminance level using the slave AOI mode. The
camera displays the current luminance within the frame (or AOI, if selected), the current
exposure, and the current gain.
4.4 I/O Control
The camera supports one TTL output and one opto-isolated output. The camera also
supports one TTL compatible and one opto-isolated trigger input.
4.5 Strobe and Synchronization Controls
The camera allows you to synchronize your system from several references. You can
synchronize with the trigger input, the start, middle or end of exposure, or the start of
image readout.
1)
The Trigger Strobe feature creates a strobe output signal from the trigger input
signal. The strobe can be delayed with respect to trigger using the Trigger Strobe
delay feature (see Trigger Control
–
Trigger Strobe Options).
2)
The camera provides signals indicating the start of exposure, mid-exposure, and
end of exposure (see Output Control: Output Mapping). These signals have a
fixed duration of 2 microseconds These signals can be delayed using the
Exposure delay feature in the trigger menu to also synchronize multiple cameras
or light sources. If a longer pulse period is required, the strobe feature can be
used.
3)
The camera also provides strobes that activate just as the readout period begins
and can be activated on all frames or just even or odd frames (see Output
Control: Strobe 1 and 2). If using internal exposure control, you can position the
strobe to occur when the exposure time starts by using the strobe delay feature.
You can position each strobe pulse within the entire frame-timing period with a
precision of 1.0 microsecond. You can set the strobe position and duration from
1.0 microsecond to the maximum frame time with a precision of 1.0
microsecond.
4.6 Gamma Control
The camera’s
built-in processing engine enables adjustments to the luminance
(brightness) of an image on the monitor. Using gamma correction, you can control,
stretch, or compress the image luminance with one of four different LUTs.
