| Functionality | 34
Note: The analysis of the test images with a histogram tool gives the correct result at a resolution of 1024 x
1024 pixels only.
Ramp
Depending on the configured grey level resolution, the ramp test image outputs a constant pattern with increasing
grey level from the left to the right side.
Figure 28: Ramp test images: 8 bit output (left), 10 bit output (middle),12 (right)
LFSR
The LFSR (linear feedback shift register) test image outputs a constant pattern with a pseudo-random grey level
sequence containing every possible grey level that is repeated for every row. The LFSR test pattern was chosen
because it leads to a very high data toggling rate, which stresses the interface electronic and the cable connection.
Figure 29: LFSR (linear feedback shift register) test image
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