National Instruments DAQArb 5411 User Manual

Also see for DAQArb 5411: Getting started guide

Contents

National Instruments DAQArb 5411 User Manual Manual pdf 51 page image

Chapter 4 Arb OperationDAQArb 5411 User Manual4-26 ©National Instruments CorporationFigure 4-23. Digital Pattern Generator Data PathYou can enable or disable digital pattern generation through software.All linking and looping capabilities are available for digital patterngeneration, as well. If you select DDS mode, the DDS data appears atthe digital I/O connector.You can use digital pattern generation to test digital devices such asserial and parallel DACs and to emulate protocols.Note: At computer power-up and reset, pattern generation is disabled.Figure 4-24 shows the timing waveforms for digital pattern generation;t clk is the clock time period and t co is time delay from clock to outputon pattern lines, such as PA <0..15>. Refer to the Appendix A,Specifications, for these timing parameters.Figure 4-24. Digital Pattern Generation TimingWaveform Memory16(16-Bit) RegisterOutput Buffer16 Digital Pattern OutOE*ClockPattern EnableClock OutLine Out80 Ω50 Ω*Output EnableClockt cot clkDn Dn+1 D n+2Data