17-2000 C
2020-09-17
28(50)
ADQ8-8C Manual
17-2000 C 2020-09-17
28(50)
4.12.2 Frame sync output on SYNC connector
The frame sync feature enables grouping of trigger signals into frames or blocks or lines. The name for
this feature relate to the actual application. This function can, for example, be used in scanning three-
dimensional measurements where a record is the first dimension, the trigger is the second and the
frame sync is the third dimension.
The frame sync count triggers and output a signal at a certain period. The period is measured in trigger
events.
4.12.3 Triggering external equipment with internal trigger
Triggering external equipment and the digitizer with the internal trigger may be done in two ways; inter-
nally,
and externally,
.
The internal connection is preferred when the trigger is only used for triggering the digitizer. The trigger-
ing is then done inside the FPGA as a logical signal and the trigger time is guaranteed to be exact on
the expected sample.
The external connection is preferred when the trigger is used for triggering both the digitizer and the
external equipment. Then the ADQ will listen to the same physical signal as the external equipment is
using.
#
DESCRIPTION
USER COMMAND
REF
a
Internal trigger generator
SetInternalTriggerPeriod
b
Select internal trigger as output
SetupTriggerOutput
c
–
–
–
d
Select
internal
trigger as trigger source
SetTriggerMode
e
Acquisition engine creates a record from streaming data
Figure 19: Internal routing of internal trigger.
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