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Chapter 2 Hardware Overview of the NI 783xR
NI 783xR User Manual 2-20 ni.com
The left local bus lines from the left peripheral slot of a PXI backplane
(Slot 2) are routed to the star trigger lines of up to 13 other peripheral slots
in a two-segment PXI system. This configuration provides a dedicated,
delay-matched trigger signal between the first peripheral slot and the
other peripheral slots for precise trigger timing signals. For example—as
shown in Figure 2-11—an NI PXI-783xR in Slot 2 can send an independent
trigger signal to each device plugged into Slots <3..15> using the
PXI/LBLSTAR<0..12>. Each device receives its trigger signal on its own
dedicated star trigger line.
Caution Do not configure the NI 783xR and another device to drive the same physical star
trigger line simultaneously. Such signal driving can damage the NI 783xR and the other
device. NI is not liable for any damage resulting from such signal driving.
Figure 2-11. PXI Star Trigger Connections in a PXI Chassis
Refer to the PXI Hardware Specification Revision 2.1 and PXI Software
Specification Revision 2.1 at
www.pxisa.org for more information about
PXI triggers.
LBLStar0
LBLStar1
LBLStar2
LBLStar3
LBR0
LBR1
LBR2
LBR3
PXI Star*
Slot 2
LBLStar0
LBLStar1
LBLStar2
LBLStar3
LBR0
LBR1
LBR2
LBR3
PXI Star
Slot 3
LBLStar0
LBLStar1
LBLStar2
LBLStar3
LBR0
LBR1
LBR2
LBR3
PXI Star
Slot 4
* A Slot 2 device ties the PXI Star Line to the PXI 10 MHz clock
Trigger 0
Trigger 1
Trigger 2
Trigger 3
Trigger 0
Trigger 1
Trigger 2
Trigger 3
Trigger 0
Trigger 1
Trigger 2
Trigger 3