CV-M2CL and CV-M8CL
6.5. Other Functions
The following functions are described under their short ASCII command name.
BA
: Output bit allocation
With this function the number of bits in the Camera Link video output can be selected to 10 or
8. If 8 bit is selected it is the 8 most significant bits. For the bit allocation in Camera Link
output, please refer to “5.4.5. Camera Link interface” and to “6.1.5. Digital video out
allocation.”
MN
: Monitor mode
In normal mode (TR=0) and full frame (SC=0) the output command (OS=2) selects the composite
analog monitor video system. MN=1 for CCIR (50 FPS, 290 active lines). MN=0 for EIA (60 FPS, 240
active lines). The line frequency is 15.734 kHz. The video can be seen on a standard monitor
with the command OS=2. SW1.1 can also be used. SW1.1 has highest priority.
This analog monochrome video output has a reduced resolution, and for M8 it is affected by the
Bayer color filter. It is for adjust and set up only.
TI
: Trigger input select
To select the trigger input via Camera Link (TI=0), or pin #10 on Hirose connector (TI=1) as a TTL
signal. The trigger input can also be selected by the internal switch, which has highest priority.
TP
: Trigger polarity
This command can change the trigger polarity.
GS
: Gamma select.
(M2CL only)
To select gamma 1 or 0.45. Gamma 1 gives linear relation between scene luminance and video
output. 0.45 will expand the contrast in dark and compress the contrast in light parts of the
scene. Gamma 0.45 is only available for single output.
RP
: Rear pot enable disable
Select master gain from the potentiometer (RP=1) or RS-232C (RP=0).
Sw 1.4 in position potm. (ON) has highest priority.
AU
: Auto dual adjust
This function is used for automatic calibration of the 2 channels to have same black level and
luminance. The calibration is done based on the average of the luminance signal in a 600 lines
area on each side of the image centre.
(AU=1), ABA (Automatic Black Adjust) is a one-push function to align the black level for the 2
channels. It is done with the lens capped, so no light will pass through to the CCD sensor.
(AU=2). AWA (Automatic White Adjust) is a one-push function to align the white level for the 2
channels. It is done with the camera looking on a white surface, which should result in 100%
video.
R ch detection area
L ch detection area
600 lines
800 pixels
800 pixels
R ch detection area
L ch detection area
600 lines
800 pixels
800 pixels
Due to temperature change, the luminance level
of L and R channels can change. It can be manual
adjusted with black level and gain. It can also be
done with the ABA and AWA one push functions.
It is done by comparing the average level of the
2 shown detecting areas. If there is a difference,
a fine adjustment of R ch is done based on L ch
values as reference. Allow 30 minutes warm up
before adjustment.
Fig. 32. Detection area for Auto dual adjust
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