CV-A10 CL and CV-A70 CL
6.5. Other Functions.
Scanning.
SC=0 through 3.
The CCD scanning format can be selected between full or partial scanning. With partial scanning
only the vertical central part of the CCD sensor is read out with a higher frame rate. The partial
scan is done by a fast dump read out of the lines in the vertical ccd register down to the top of
the partial image. This central part of the image is read out with normal speed. The lines below
the partial image is read out and dumped with a high speed. With partial scan the shutter speed
is limited to be shorter than the frame read out time. There is no limitation in PWC mode.
Binning will not work in partial scanning modes. Partial scan has highest priority.
Note: The color sequence for CV-A70 CL differ in partial scan modes. Refer to chapter 6.1.4.
Binning.
VB=0 through VB=3 and HB=0 through HB=3.
(CV-A10 CL only).
Binning mode is a function where the signal charge from 2 or more adjacent pixels are added
together and read out as one pixel. A resulting full frame with lower spatial resolution can be
read out with a higher rate, and higher sensitivity. The CV-A10CL has vertical and horizontal
binning 2:1, 3:1 and 4:1. H and V binning can work together. The aspect ratio is then correct if
the pixel clock is divided in the frame grabber.
Vertical binning is done by adding the pixel charge from adjacent lines together in the horizontal
ccd register. It is done by multiple pulses to the vertical ccd register.
Horizontal binning is done by adding the charge from adjacent pixels together in the
sample/hold circuit on the CCD output.
Lowest shutter speed is reduced to be shorter than the frame read out time. There is no
limitation in PWC mode.
Binning will only work in full frame modes.
(SC=0).
Smearless readout.
SL=1.
This function will reduce the unwanted smear signal from a highlighted scene when a short
exposure time is used. It works in all trigger modes, but a dummy readout is performed before
the active accumulation is started. It will remove the smear above the highlighted parts in the
image, but there is still smear left below highlighted areas.
The trigger leading edge will start the dummy readout. It takes 86 lines before the exposure
starts. The exposure stops and the resulting video signal is read out. This mode will operate with
full and partial scanning and with all binning modes.
Shutter mode.
SM=0, SM=1 and SM=2. SH=0 through SH=14 and PE=0 through PE=625.
With SM=0 this function selects the shutter from the 15 fixed steps (SH).
With SM=1 from programmable in 625 steps (PE).
SM=2 is auto shutter (CCD iris). The range is from OFF to 1/25,000. The reference setting for
auto shutter is done with the command AH=. Together with the AGC function it will keep the
video output constant over a wide range of illumination. Auto shutter will work in continuous
mode and reset continuous trigger mode.
(TR=0, TR=10).
Do not use auto iris lens together with the auto shutter function. The camera may be unstable.
Trigger input select.
TI=0, TI=1.
This function selects the trigger input to be through Camera Link (TI=0), or as TTL through the
12 pin Hirose connector (TI=1).
Trigger polarity.
TP=0, TP=1.
The active trigger polarity is normal low (TP=0). It can be invert it to active high (TP=1).
Gamma.
GS=0, GS=1.
For CV-A10CL, gamma can be set to 1.0, which is linear, or 0.45. (GS=0) or (GS=1).
For CV-A70CL gamma is 1.0.
- 22 -
