National Instruments MXI-Express x4 Series User Manual

Also see for MXI PCIe-8375: Setting up

Contents

National Instruments MXI-Express x4 Series User Manual Manual pdf 22 page image

Chapter 3 Hardware Overview© National Instruments Corporation 3-3 Fiber-Optic MXI-Express x4 for PXI Express User ManualCabled Fiber-Optic MXI-Express x4 ConnectorThe cabled Fiber-Optic MXI-Express x4 connector provides the transmitand receive signals to connect an NI PCIe-8375 and an NI PXIe-8375.PCI Express-to-PCI BridgeThe PCI Express Base Specification defines a PCI Express-to-PCI bridgeas a device that connects a PCI Express fabric and a PCI hierarchy. On theNI PXIe-8375, the PCI Express-to-PCI bridge connects the PCI Expressswitch and an SMBus Master on the card.SMBus MasterThe SMBus is a low-speed bus for reading and configuring devices outsidethe normal PCI Express mechanism. The PXI Express specificationrequires controllers to supply an SMBus for reading chassis configurationinformation from an EPROM. It may also be used for fan control, powermonitors, or other system devices. In addition, devices on plug-in boardsmay connect to the SMBus for purposes specific to those devices.LED IndicatorsThe LEDs on Fiber-Optic MXI-Express x4 cards give status informationabout power supplies and link state. The NI PCIe-8375 has one tri-colorLED for the port on the panel. The NI PXIe-8375 has two tri-color LEDs,one for each port.The front-panel LEDs on the NI PCIe-8375 and NI PXIe-8375 indicate thefollowing:Table 3-1. NI PCIe-8375 and NI PXIe-8375 Status LED MessagesLED MeaningOff Power is offRed, Blinking Power is out of specAmber Power is within spec; link not establishedGreen Power is within spec; link established