waveform acquisition and an average of

Hello!

I need to acquire signals of samples N M and their average. Waveforms are started by external trigger, internal clock. Repetition rate is maximum 5 kHz. The wavelength must be close to the reverse of this (preferably in 95%, for example, 0.95 * 0.2 ms). No trigger must be lost. M is (preferably) of the order of thousands. N is (preferably) as temporal resolution allows. After receiving the data, any time can be spent on whatever the task. What will be the right strategy to deal with this problem?

M - and E-series, C-interface for NIDAQmx DLL maps (I'll also undestand v8.2 example labview)

Thank you!

Boris

Hi Boris,.

If you have a 6289, there is no average capabilities of equipment, but performing the calculation of the average in the software is not a problem. If I understand your requests, all requests are achievable.

You are limited by the number of channels for the number of playback channels on your 6289, but if it's ok, you're all set.

External triggers and internal clock are quite feasible. Have you looked into the Finder of example of NOR? There are many examples which will do almost everything of what you specify. ; If you can work with LabVIEW 8.2 I open your finder example and discover two examples in particular. The first is called Acq & Clk of the NTI tension of Graph - Dig Start.vi. This can be found in the Finder example under the following folder path. Material input and output > DAQmx > Analog measures > tension. The second example though, I might help you is called Multi-multifunction-Ctr-Retrigg Pulse Train generation to HAVE sample Clock.vi. This example is located in the path of the material Input and Output > DAQmx > synchronization > multifunctional. This example uses a meter (which is triggered at the material time) as the sample for your task to acquire analog clock.

Essentially, these examples can be translated directly into C programs, with the accompaniment of installation and definitions, etc. which are used in C. If you are curious about the C functions that relate to a DAQmx function, see Help reference DAQmx C, located in the start menu > programs > National Instruments > NOR-DAQ > Documentation. There are also examples of C who install if you install support for the CVI when you install DAQmx and they install the the following location: C:\Documents and Settings\All Users\Shared Documents\National Instruments\NI DAQ...

Chris W

Tags: NI Software

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