Programming instructions

Contents
© National Instruments Corporation vii LabVIEW Data Acquisition Basics Manual
Chapter 7
Buffering Your Way through Waveform Acquisition
Can You Wait for Your Data? .........................................................................................7-1
Acquiring a Single Waveform...........................................................................7-2
Acquiring Multiple Waveforms ........................................................................7-3
Simple-Buffered Analog Input Examples........................................................................7-5
Simple-Buffered Analog Input with Graphing..................................................7-5
Simple-Buffered Analog Input with Multiple Starts.........................................7-7
Simple-Buffered Analog Input with a Write to Spreadsheet File .....................7-8
Triggered Analog Input.....................................................................................7-8
Do You Need To Access Your Data during Acquisition?...............................................7-8
Continuously Acquiring Data from Multiple Channels ....................................7-10
Asynchronous Continuous Acquisition Using DAQ Occurrences....................7-11
Circular-Buffered Analog Input Examples......................................................................7-12
Basic Circular-Buffered Analog Input ..............................................................7-13
Other Circular-Buffered Analog Input Examples .............................................7-13
Cont Acq&Chart (buffered).vi............................................................7-14
Cont Acq&Graph (buffered).vi...........................................................7-14
Cont Acq to File (binary).vi................................................................7-14
Cont Acq to File (scaled).vi ................................................................7-14
Cont Acq to Spreadsheet File.vi .........................................................7-14
Simultaneous Buffered Waveform Acquisition and Waveform Generation...................7-14
Chapter 8
Controlling Your Acquisition with Triggers
Hardware Triggering........................................................................................................8-1
Digital Triggering..............................................................................................8-2
Digital Triggering Examples...............................................................8-4
Digital Triggering Examples...............................................................8-5
Analog Triggering .............................................................................................8-5
Analog Triggering Examples..............................................................8-7
Software Triggering.........................................................................................................8-8
Conditional Retrieval Examples .........................................................8-11
Chapter 9
Letting an Outside Source Control Your Acquisition Rate
Externally Controlling Your Channel Clock ...................................................................9-3
Externally Controlling Your Scan Clock.........................................................................9-6
Externally Controlling the Scan and Channel Clocks .....................................................9-8