3.4.5.1 Example
For instance, it could be required to start the acquisition on all the channels of a multi-board
system as soon as one of the channels of a board (board “n”) crosses its threshold. Trigger Out
signal is then fed to an external Fan Out logic unit; the obtained signal has then to be provided to
the external trigger input TRG-IN of all the boards in the system (including the board which
generated the Trigger Out signal).
In this case, the programming steps to perform are following described:
1. Register 0x8110 on board “n”:
Enable the desired trigger request as Trigger Out signal on board “n” (by bits[3:0]
mask);
Disable Software Trigger and External Trigger as Trigger Out signal on board “n”
(bits[31:30] = 00);
Set Trigger Out signal as the OR of the enabled trigger requests on board “n”
(bits[9:8] = 00).
2. Register 0x811C on board “n”:
Configure the digitizer to propagates on GPO the internal trigger sources according
to the 0x8110 settings (i.e. the enabled trigger request, in the specific case) on board
“n” (bits[17:16] = 00).
3. Register 0x810C on all the boards in the system (including board “n”):
Enable External Trigger to participate in the board’s common acquisition trigger,
disable Software Trigger and the Trigger Requests from the channels (bits[31:30] =
01; bits[3:0] = 0000).
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