NI DAQmx: Downsample Analog Input Sample Clock

I. Description:
This example demonstrates how to acquire data continuously and simultaneously downsample the internal clock for the analog input by outputting a pulse for every 100 analog input samples.

This behavior is particularly helpful for applications such as sending a clock signal to a peripheral device once every N samples.

II. Instructions for Running:
1. Create an analog input voltage channel.
2. Set the rate for the sample clock. Additionally, define the sample mode to be continuous.
3. Create a counter output channel.
4. Make sure that the source of ticks is from the same device as the analog input channel.
5. Call the Start VI to start the acquisition.
6a. Read the waveform data in a loop until the user hits the stop button or an error occurs.
Note: This example reads data from one or more channels and returns an array of data. Use the Index Array function to access an individual channel of data.
6b. While the data is being read check for errors that may have occurred in the counter operation.
7. Call the Clear Task VIs to clear the Tasks.
6. Use the popup dialog box to display an error if any.

IV. I/O Connections Overview:
Make sure your signal input terminal matches the Physical Channel I/O Control. For further connection information, refer to your hardware reference manual.

Requirements

Filename: downsample_ai_sample_clock.vi

Software Requirements

Application Software: LabVIEW Base Development System 7.1
Language(s): LabVIEW

Hardware Requirements

Hardware Group: Multifunction DAQ (MIO)
Hardware Model: PCI-6220, PCI-6254, PCI-6221 (37-Pin), PCI-6222, PCI-6224, PCI-6225, PCI-6229, PCI-6250, PCI-6251, PCI-6255, PCI-6259, PCI-6280, PCI-6281, PCI-6284, PCI-6289, PCI-6221
Driver: NI-DAQmx 7.5

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