PXI (PCI eXtensions for Instrumentation) machine case and PXI testing system

Abstract

The invention discloses a PXI (PCI eXtensions for Instrumentation) machine case and a PXI testing system. The PXI machine case comprises a machine case casing and a PXI back plate arranged in the machine case casing. A PXI bus clock and a clock signal selector are arranged on the PXI back plate. A handover decision unit, a plurality of clock signal input ends and clock signal output ends corresponding to the plurality of clock signal input ends are arranged on the clock signal selector. The clock signal input ends are connected with one clock signal source, the clock signal output ends are connected with the PXI back plate, the clock signal source is a PXI bus clock or a non-PXI bus clock, and the handover decision unit is used for switching electric connection between the corresponding clock signal input ends and the clock signal output ends according to predetermined clock source priority level when ascertaining that effective non-PXI bus clock input exists at the clock signal input ends. Universality of the PXI machine case is improved.

Description

technical field [0001] The invention relates to measurement and control technology, in particular to a PXI chassis and a PXI test system. Background technique [0002] PXI (PCI eXtensions for Instrumentation, PCI extensions for instrumentation systems) is a rugged PC-based measurement and automation platform. PXI combines the electrical bus characteristics of PCI with the ruggedness, modularity, and mechanical packaging of Eurocard of CompactPCI, and adds a dedicated synchronization bus and major software features. This makes PXI a high-performance, low-cost delivery platform for measurement and automation systems. PXI systems can be used in various fields such as manufacturing test, military and aerospace, machine monitoring, automotive production, and industrial testing. [0003] The PXI backplane in the existing PXI chassis can only use the clock signal provided by the pre-configured PXI bus clock as the reference clock. If the clock signal required for the actual test...

AI Technical Summary

Problems solved by technology

If the clock signal required for the actual test does not match the pre-configured PXI bus clock, the PXI chassis cannot be used for testing, thus limiting the versatility of the PXI chassis

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