PXIe Revision B Chassis Performance Hardware: PXI/CompactPCI>>Chassis>>PXIe-1062Q
Problem: •
I have a PXIe-1065 system with an Arbitrary Waveform Generator and a Digitizer amongst other instruments. I've noticed a very slow performance when using the Arb. How can I improve this performance? Solution: We have encountered an issue with the PLX switch used in Rev B PXIe-1065 chassis. When having an upstream board (digitizers) behind the same bridge as a downstream board (Arbs), a problem in the switch causes the downstream boards to starve. This can cause up to 50% performance decrease on any downstream board. Slots 9 through 14 are located behind this PLX switch. In order to avoid this performance problem ensure that both boards are not located, behind, the bridge (slots 9-14). Either by placing them in slots 7 and 8 or by placing one in slot 7 or 8 and the other behind the bridge. For a detailed chassis backplane setup please reference the PXIe-1065 Functionality knowledge base linked below. Related Links: NI PXIe-1065 PXI Express PXIe-1065 Functionality Attachments:
Report Date: 06/27/2007 Last Updated: 08/03/2007 Document ID: 4AQDNUPS |
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