National Instruments PXI 1000B User Manual

Also see for PXI 1000B: User manual User manual Installation guide Additional information User manual

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National Instruments PXI 1000B User Manual Manual pdf 17 page image

Chapter 1 Getting Started©National Instruments Corporation1-7PXI-1000B User ManualPeripheral SlotsThere are seven peripheral slots including the Star Trigger controller slot.Local BusThe PXI backplane’s local bus is a daisy-chained bus that connects eachperipheral slot with its adjacent peripheral slots to the left and right, asshown in Figure 1-4.For example, a given peripheral slot’s right local bus connects to theadjacent slot’s left local bus and so on. Each local bus is 13 lines wide andcan pass analog signals between cards or provide a high-speed side-bandcommunication path that does not affect the PXI bandwidth.Local Bus signals may range from high-speed TTL signals to analogsignals as high as 42 V. Initialization software keys adjacent boards toprohibit the use of incompatible boards. This software uses theconfiguration information specific to each peripheral board to evaluatecompatibility. This method is a flexible way to define local busfunctionality that is not limited by hardware keying.Figure 1-4. PXI Local Bus and Star Trigger RoutingSystem Controller Slot [1]Star Trigger/Peripheral Slot [2]Peripheral Slot [3]Peripheral Slot [4]Peripheral Slot [7]Peripheral Slot [8]LocalBusLocalBusStar TriggersPCI Arbitration and Clock SignalsLocalBus