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Chapter 1
Getting Started
PXI Local Bus
The PXI backplane local bus is a daisy-chained bus that connects each peripheral slot with
adjacent peripheral slots to the left and right.
The backplane routes PXI Local Bus 6 between adjacent PXI slots. The left Local Bus 6 from
slot 1 is not routed anywhere. The right Local Bus 6 from slot 8 is also not routed anywhere.
Local bus signals may range from high-speed TTL signals to analog signals as high as 42 V.
Initialization software uses the configuration information specific to each adjacent peripheral
module to evaluate local bus compatibility.
Figure 1-5.
PXI Trigger Bus Connectivity Diagram
PXI Trigger Bus
All slots share eight trigger lines.You can use these trigger lines in a variety of ways. For
example, you can use triggers to synchronize the operation of several different PXI peripheral
modules. In other applications, one module can control carefully timed sequences of operations
performed on other modules in the system. Modules can pass triggers to one another, allowing
precisely timed responses to asynchronous external events the system is monitoring or
controlling.
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PXI Trigger B
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