Pxie_Dstar<A..c; Table 3-1. Pxie_Dstar Line Descriptions - National Instruments SC Express PXIe-4309 User Manual

Chapter 3 SC Express Considerations
An SC Express module receives the Star Trigger signal (PXI_STAR) from a System timing
controller. PXI_STAR can be used as a trigger signal for input operations.
An SC Express module is not a System timing controller. An SC Express module can be used in
the system timing slot of a PXI system, but the system will not be able to use the Star Trigger
feature.
PXIe_DSTAR<A..C>
PXI Express devices can provide high-quality and high-frequency point-to-point connections
between each slot and a system timing slot. These connections come in the form of three
low-voltage differential star triggers that route between a PXI Express system timing controller
and a peripheral device. Using multiple connections simplifies the creation of applications
because of the increased routing capabilities.
Table 3-1 describes the three differential star (DSTAR) lines and how they are used.
Trigger Line
PXIe_DSTARA
PXIe_DSTARB
PXIe_DSTARC
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
.
www.pxisa.org
3-2 | ni.com

Table 3-1. PXIe_DSTAR Line Descriptions

Distributes high-speed, high-quality clock signals from the system
timing slot to the peripherals (input).
Distributes high-speed, high-quality trigger signals from the
system timing slot to the peripherals (input).
Sends high-speed, high-quality trigger or clock signals from the
peripherals to the system timing slot (output).
Purpose