Large Scale Integration Trigger Support; 1Distributing Trigger; 2Clock Reference; 3High Precision Trigger On Analog Input - Teledyne ADQ8-4X Manual

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# DESCRIPTION
a Internal trigger generator
b Select internal trigger as output
c The trigger output and the external trigger input are electrically connected
inside the digitizer
d Select external trigger as trigger source
e Acquisition engine creates a record from streaming data
Figure 19: External routing of internal trigger.

4.13 Large scale integration trigger support

The ADQ8-4X supports integration into a large scale PXIe chassis for single shot applications, The
function is described in the manual [6]. This section is only a short introduction.
4.13.1 Distributing trigger
The trigger is distributed to the boards via the SYNC input and output. The trigger distribution is daisy
chained, so there is no limit to the number of boards.
4.13.2 Clock reference
Use the clock reference distribution in the backplane of the chassis for phase alignment of the digitizers
in the system.
4.13.3 High precision trigger on analog input
The source for the trigger can be any available trigger. If one of the analog inputs is used as a high pre-
cision input, the trigger timing can be computed to 25 ps trigger precision.
4.13.4 Calibration
To reach the trigger accuracy of 200 ps for the entire chassis installation, the system has to be cali-
brated in the factory [5].
19-2302 A
2020-09-16
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USER COMMAND
SetInternalTriggerPeriod
SetupTriggerOutput
SetTriggerMode
ADQ8-4X Manual
19-2302 A 2020-09-16
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4.11
4.12
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