Dalsa 1M28-SA User Manual page 43

1M28, 1M75, and 1M150 User's Manual
register 6). In Skim mode, an active flag EN_TOGGLE results in automatic switching to a factory
set skim voltage (bits 5/6 register 7).
Bit 5 activates LinLog2 behavior.
Bot 6 register 6 switches the camera to logarithmic mode (classical logarithmic pixel in non-
integrating mode).
should activate a gain of 4, followed by an offset adjustment of the camera. You can remove the
Fixed Pattern Noise (FPN ~50%) very effectively by a digital pixel-by-pixel offset correction
(difference image technique with a dark image as reference). Bits 5 and 7 should not be set in this
mode.
Bit 7 register 6 activates the LinLog mode. It is used by the internal state machines to generate the
LinLog characteristic. This value toggles between 0 and 1 when the LinLog2 characteristic
(EN_LL2_LOG = 1) is active.
Table 16: Camera Resolution and Special Functions
Enable3
0
0
1
1
To test the interface reliability, a 10 bit Linear Feedback Shift Register (LFSR) is implemented. A
LFSR is a sequential shift register with combinational feedback logic around it that causes it to
pseudo-randomly cycle through a sequence of binary values. It is reset at every line start.
Therefore, it is possible to compare the incoming signal with an internally generated one to count
the transmission errors.
Table 17: Mode Register 1 (Register address REGADDR = 7D = 07H)
Register address 7 - MODE1_REG
Bit
0 to 3
4
5
6
7
!
WARNING: Do not modify Mode Register 1 (bits 0 to 3). If corruption occurs, write in default
values or contact DALSA. Modifying these values may result in a malfunction or limited
functioning of the camera.
You should use the LSFR test pattern for data path integrity. Alternately, you can turn on the
dummy line with bit 4. With the help of the dummy line, the transfer of data from the camera to
the framegrabber card can be easily tested.
DALSA
PRELIMINARY
Note: DALSA does not provide support for this mode
Enable2 Function
0 8 bit
1 8 bit
LUT 10-to-8
0 10 bit
1 10 bit LFSR
Name Description
Reserved Do not change
EN_DUMMY = 1 Dummy line on = 0
SKIM_IMAGE0 = 1 Skim voltage 0 on, = 0
SKIM_IMAGE1 = 1 Skim voltage 1 on, = 0
HIGH_GAIN = 1 Gain by 4, = 0
. In logarithmic mode, you
Comment
Digital gain x 1
Two user programmable LUT's
LUT0 factory preset digital gain x 2
LUT1 factory preset digital gain x 4
Digital gain x 1
Interface test with Linear Feedback Shift Register
(LFSR)
Dummy line off
Skim voltage 0 off
Skim voltage 1 off
gain by 1
43
Default
0
0
0
0
0
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