Unigraf UCD-240, User Manual

Page: 23 / 78

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23.
 Frame rate tolerance (mHz)
 Reference CRCs (R, G, B)
CRC Based Single Frame Video Stability Test
The test verifies that the captured video is stable.
TE captures a frame and sets the CRC of its color components as reference. After that TE
captures frames and compares their CRC (check sum) to the reference until the number of
bad frame limit provided is detected or the provided total number of frames is reached.
The test is judged FAIL if the number of bad frames is exceeded.
The test optionally captures the failed frames as bitmap images and stores them into the
hard disc.
Parameters in use
 Test Timeout (default 100 000 ms)
 Total number of frames (default 2 000 ms)
 Number of bad frames allowed (default 2)
CRC Based Sequence of Reference Frames Test
The verifies that a sequence of frames is captured in the right order.
TE compares the video mode (frame Width, Height, BPP and optionally Frame rate) to
provided parameters. After that captures frames to find a frame with matching CRC (check
sum) of their three color components to the first provided reference. After the first
matching CRC is found it compares the CRC of the following frames until the Number of
frames tested parameter is reached.
The test is judged FAIL if video mode does not match, the first frame in the list is not found
or the CRC of the following frames do not match the provided list.
The test optionally captures the failed frames as bitmap images and stores them into the
hard disc.
Parameters in use
 Test Timeout (default 100 000 ms)

Number of frames to be tested (default 20)
 Reference width (default 1920)
 Reference height (default 1080)
 Reference BPP (default 24)
 Expected frame rate (mHz)
 Frame rate tolerance (mHz)
 Reference CRCs (R, G, B)
Note: Please note that in order for the TE to maintain the sequence, all CRCs in the reference
frame list should be different.
CRC Based Continuous Sequence of Reference Frames Test
The test verifies that a sequence of frames is captured in the right order many times
repeatedly.