This is the channel Trigger width register  0x1n84

The same value should be set for each channel involved in the coincidence. The value is expressed in 
trigger clock cycles - ie units of 10ns.


Shaped Trigger Width (0x1n84 (channel n), 0x8084 (all channels, write only), R/W, I)
Set the number of samples for the Shaped Trigger width. The Shaped Trigger is a logic signal generated by a channel in correspondence 
with its local self‐ trigger. It is used to propagate the trigger to the other channels of the board and to other external boards, as well as to 
feed the coincidence trigger logic.
Bit Description
[7:0] Set the number of samples for the Shaped Trigger width. This is
     useful both to set the width of the TRG-OUT signal, and to set the
    coincidence time window width.
[31:8] Reserved