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MVD DCIM output packet format
| Data word | contents | typical value below |
| 1 | all 1's | FFFF |
| 2 | DetID | 2 |
| 3 | level-1 trigger | 1,2,... |
| 4 | ModAdd | 3E (fixed by jumpers on DCIM) |
| 5 | FlagWord | 0 |
| 6 | BeamCounter | any 8 bit value is possible |
| 7 | AMUCells | NNMM where NN=MM+2 |
| 8-263 | ADC values | between 0 and 3FF |
| 264 | User word1 | 0 |
| ... | ... | ... |
| 270 | User word7 | 0 |
| 271 | User word8 | 400 or 4400 |
| 272 | Vert.Parity | parity word |
| 273 | all zero | 0 |
