====== Buffer structure ======
===== Raw data =====

^header ^ #ligne ^
|ca fe ba be| 0 0 0 4| 


^ GTC (2 bytes) ^ ABCID (6 bytes)^
|0 1 | 0 7  23 19 f0 9 |


^ channel ^ BCID ^ coarse (4 bytes 2.5 ns) ^ fine (2.5 ns/256)^
|e |0 2| 8 7c 22 6 |38|
|10 |0 7 |8 7c 23 95 |9d|  
|2 |0 2| 8 7c 21 ff |f4 |

===== File Payload Structure =====
<code>
  itemp[0]=_event;
  itemp[1]=_gtc;
  ltemp[1]=_abcid;
  itemp[4]=_mezzanine;
  itemp[5]=_adr;
  itemp[6]=_channels.size();
  // and then list of channels in 8 bytes structure
</code>

^ channel ^ BCID ^ coarse (4 bytes 2.5 ns) ^ fine (2.5 ns/256)^
|e |0 2| 8 7c 22 6 |38|
|10 |0 7 |8 7c 23 95 |9d|  
|2 |0 2| 8 7c 21 ff |f4 |