Keysight Technologies VXI bus 75000 C Series Configuration And User's Manual
Also see for VXI bus 75000 C Series: Service guideUser manual
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72 Keysight E8491B IEEE 1394 PC Link to VXI User GuideIEEE 1394 Fundamentals and Interface Overview Using this ChapterThe power wires route power from the host adapter to devices (nodes) on thebus, whether the devices are turned on or off. Since each device in the systemacts as a repeater, the power supplied to a device that is turned off enablessignals to be transferred across that device. This maintains signal continuitythroughout the system.The Keysight E8491B PC to VXI InterconnectThe E8491B is a VXI C-size device (Figure 4-5) normally installed in mainframeslot 0. With a logical address of 0, the E8491B functions as the mainframe’sresource manager via software included with the I_O libraries. The E8491B has128 kBytes of shared RAM and contains many of the clock and triggeringfeatures found on the Keysight E1406A Command Module - a VXI resourcemanager/slot 0 device common in many GPIB-based systems. A VXI mainframewith the E8491B in slot 0 can also be powered on/off at any time withoutaffecting other mainframes in the system.The E8491B IEEE 1394 interconnect links the VXI backplane to the IEEE 1394bus. However, the E8491B and the IEEE 1394 bus do not extend the (VXI)backplane between frames in multi-frame VXI systems. This means that themultimeter and multiplexers in a VXI scanning multimeter for example, must beinstalled in the same mainframe. Devices sharing the VXI Local bus must also beinstalled in the same mainframe VXI Local bus.Figure 4-4 Cross-section of the IEEE 1394 Cable.1 3 52 4 66.1 mmpower wiresshieldssignal pair wires connectorPIN # COMMENT1 cable power2 cable ground3/4 strobe on receive,data on transmit5/6 data on receive,strobe on transmit |
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