First of the sync words of each ARS boards as a function of the event number.
First row show boards on the top crate. They are all fine and stable over the whole run.
Bottom crate have some problems. Two boards (not shown) were removed because the number of events in the FIFO was out of sync. From the 4 remaining boards, two get out of sync during the run.
We plan to make an access to debug: taking runs with different combinations of boards (including spares).
Figure 1