Basler A202k User's Manual Supplement - Draft
Supplement
6
Basler A202k High Gain
DRAFT
Shift Twice
When the camera is set to shift twice, the output
from the camera will include bit 7 through bit 0
from each ADC along with two zeros as LSBs.
The result of shifting twice is that the output of the
camera is effectively multiplied by four. For
example, assume that the camera is set for no
shift, that it is viewing a uniform white target, and
that under these conditions the reading for the
brightest pixel is 100. If you changed the digital
shift setting to shift twice, the reading would
increase to 400.
Shift Three Times
When the camera is set to shift three times,
the output from the camera will include bit 6
through bit 0 from each ADC along with
three zeros as LSBs.
The result of shifting three times is that the
output of the camera is effectively multiplied
by eight. For example, assume that the
camera is set for no shift, that it is viewing a
uniform white target, and that under these
conditions the reading for the brightest pixel
is 100. If you changed the digital shift setting
to shift three times, the reading would
increase to 800.
L
Note that if bit 9 is set to 1, all of the other bits will automatically be set to 1. This
means that you should only use the shift once setting when your pixel readings in
10 bit mode with no digital shift are all below 512.
Since the shift once setting requires that the least significant bit always be "0", no
odd gray values can be output. In this case, the gray value scale will only include
gray values of 2, 4, 6 and so forth. The absence of some gray values is commonly
called "Missing Codes”.
L
Note that if bit 9 or bit 8 is set to 1, all of the other bits will automatically be set to 1.
This means that you should only use the shift twice setting when your pixel readings
in 10 bit mode with no digital shift are all below 256.
Since the shift twice setting requires that the two least significant bits always be "0",
the gray value scale will only include every 4th gray value. For example, 4, 8, 16
and so forth.