National Instruments DAQ X Series User Manual page 222

Chapter 9 Digital Routing and Clock Generation
Table 9-2 describes the three differential star (DSTAR) lines and how they
are used.
The DSTAR lines are only available for PXI Express devices when used
with a PXI Express system timing module. For more information, refer to
the PXI Express Specification at
X Series User Manual
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Table 9-2. PXIe-DSTAR Line Descriptions
Trigger Line
PXIe_DSTARA Distributes high-speed, high-quality clock signals
from the system timing slot to the peripherals
(input).
PXIe_DSTARB Distributes high-speed, high-quality trigger
signals from the system timing slot to the
peripherals (input).
PXIe_DSTARC Sends high-speed, high-quality trigger or clock
signals from the peripherals to the system timing
slot (output).
9-10
Purpose
.
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