National Instruments NI PXI-562X User Manual

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National Instruments NI PXI-562X User Manual Manual pdf 21 page image

Chapter 2 Hardware Overview© National Instruments Corporation 2-7 NI PXI-562x User ManualFigure 2-4 shows a timing diagram of a multiple-record acquisition.Figure 2-4. Multiple-Record Acquisition Timing DiagramTriggeringYou can externally trigger the NI 562x through the digital line, PFI1.You can also use software to trigger the NI 562x. Figure 2-5 shows thedifferent trigger sources. The digital triggers are TTL-level signals witha minimum pulse-width requirement of 100 ns or 16 ns times the DDCdecimation.Figure 2-5. Digital Trigger SourcesCalibrationAlthough the NI 562x is factory calibrated, it needs periodic calibration toverify that it is still within the specified accuracy. For more information oncalibration, contact NI or visit the NI Web site atni.com/support/calibrat.TriggerAcquisitionIn ProgressBuffer= Trigger Not Accepted (Pretrigger Points Not Acquired)= Trigger Not Accepted (500 ns Dead Time)= Trigger Not Accepted (Acquisition in Progress)= Trigger Accepted1 211 2 323500 nsTriggerSoftwareRTSI <0..7>PFI18PXI Star