Chapter 1
Getting Started
1-10
ni.com
The PXI trigger lines from adjacent PXI trigger bus segments can be routed
in either direction across the PXI trigger bridges. Refer to Figure 1-5 for the
connectivity diagram. This allows you to send trigger signals to, and
receive trigger signals from, every slot in the chassis. Static trigger routing
(user-specified line and directional assignments) can be configured through
Measurement & Automation Explorer (MAX). Dynamic routing of triggers
(automatic line assignments) is supported through certain National
Instruments drivers like NI-DAQmx.
Note
Although any trigger line may be routed in either direction, it cannot be routed in
more than one direction at a time.
Figure 1-5.
PXI Trigger Bus Connectivity Diagram
System Reference Clock
The PXIe-1075 chassis supplies PXI_CLK10, PXIe_CLK100 and
PXIe_SYNC100 to every peripheral slot with an independent driver for
each signal.
An independent buffer (having a source impedance matched to the
backplane and a skew of less than 1 ns between slots) drives PXI_CLK10
to each peripheral slot. You can use this common reference clock signal to
synchronize multiple modules in a measurement or control system.
PXI
Trigger
Bridge
PXI
Trigger
Bridge
PXI Trigger B
us
S
egment 2 (
S
lot
s
7-12)
PXI Trigger B
us
S
egment 1 (
S
lot
s
1-6)
PXI Trigger B
us
S
egment
3
(
S
lot
s
1
3
-1
8
)
0
H
H
H
H
H
H
H
H
1
2
3
4
5
6
7
8
9
10
11
12
1
3
14
15
16
17
1
8
