National Instruments NI 6711 User Manual

Also see for DAQCard-6715: User manual User manual

Contents

National Instruments NI 6711 User Manual Manual pdf 73 page image

Chapter 8 Real-Time System Integration Bus (RTSI)© National Instruments Corporation 8-3 Analog Output Series User ManualFigure 8-2 shows the PXI RTSI bus signal connection.Figure 8-2. PXI RTSI Bus Signal ConnectionRefer to the Timing Signal Routing section of Chapter 7, Digital Routing,for a description of the signals shown in Figure 8-1 and Figure 8-2.Note In NI-DAQmx, some additional timing signals not shown in the figures can berouted to RTSI indirectly. Click the Device Routes tab in Measurement & AutomationExplorer for more information.Device and RTSI ClocksMany AO Series device functions require a frequency timebase togenerate the necessary timing signals for controlling DAC updates orgeneral-purpose signals at the I/O connector. This timebase is also calledthe Master Timebase or Onboard Clock. For more information, refer to theMaster Timebase Signal section of Chapter 3, Analog Output.The AO Series device can use either its internal 20MHzTimebase signal ora timebase received over the RTSI bus. The timebase can only be routed toor received from RTSI 7, or the RTSI clock. The device uses this clocksource, whether local or from the RTSI bus, as the primary frequencyPXI Bus ConnectorSwitchRTSI SwitchPXI Trigger 7PXI Trigger<0..5>DAQ-STCCtr0 SourceCtr0GateCtr0InternalOutputCtr0OutCtr1SourceCtr1Gate20MHzTimebaseMasterTimebasePXI Star 6 ao/StartTriggerao/PauseTriggerao/SampleClockTimebase6ao/SampleClock