We have found a problem in time tagging of several MEA products.
MEA Moments
Depending on the mode (Low, Med, High), velocity moments should have a different periodicity :
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Low mode : 16s
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Med mode : 4s
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High mode : 2s
However, we found that regularly, there is a shift in the TI0 value.
Rather than a regular periodicity of 4s in Med mode:
Record TI0
1 t1
2 t2 = t1 + 4s
3 t3 = t2 + 4s
4 t4 = t3 + 4s
5 t5 = t4 + 4sWe found some inconsistencies :
Record TI0
1 t1
2 t2 = t1 + 4s
3 t3 = t2 + 8s // Shift of 4 seconds
4 t4 = t3 + 0s // Return to normal timetag
5 t5 = t4 + 4sIn the case of Low mode, rather than a regular increase of 16s, we can found :
Record TI0
1 t1
2 t2 = t1 + 16s
3 t3 = t2 + 20s // Shift of 4 seconds
4 t4 = t3 + 12s // Return to normal timetag
5 t5 = t4 + 16sSo, it seems that there is regurlarly a shift of 4s in TI0, as if onboard software has a synchronisation bug, and take an incorrect value of TI0.
Examples
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same king of problem occurs for other products PAP’s, OMN, 3D |
