The figure 1.2 shows the timing of the EUROBALL ft and ancillary trigger to get an ancillary tigger signal. It shows also the dead time between the start of FERA coding and the end of the FERA readout.
Figure 1.2: timing of ancillary trigger generation
The delay to start the FERA readout depends of the time required by the
FERA ADCs for the coding. This
time is between two values, depending of the ADCs types:
- 
Sec for Lecroy.
- 
Sec for Ganelec.
In the EUROBALL master trigger, Validation may not be delayed longer than 
Sec.
In order to do the Fera coding, the FERA readout and the VXI readout with concordance of the timing, the FVI must have the fonctionnalities which are exposed in the next chapter.