Bandpassfilter digital signal

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  Hello Chris

  I checked the specification for Satellite P100 - 227 (PSPA0E) and it is listed follow Note:
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  Marie-Hélène

  Hi, Maud.

  Thanks for the update and I hope that your well today.

  Sorry for the delay but it was the Easter holidays!

  Thank you for your congratulations.

  I put your sampling frequency at the maximum rate of the clock source (encoder). The DAQmx driver uses the sampling frequency (and the number of samples per channel) information to perform various calculations and set sizes for the buffer.

  If you set it too high, nothing will happen-guests still just on each edge of the unit receive. If you set it too low, your stamp could be too small and you may lose data.

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• MyDAQ - generation of a digital signal and display on an analog waveform graph

  Hello

  I use the MyDAQ OR generate a digital waveform with a Frequency adjustable. This is implemented in a program, I already wrote it, which generates a TTL 'like' impulse out of the sound card. I display the result on a graph of analog wave form, and I would like to be able to display the digital signals generated by the myDAQ on the same graph. (Not in the same time, one or the other, activated by a button). I've been messing around with tables and conversions, but I can't really do with all this.

  It's the vi, I did to generate the digital signal of frequency with MyDAQ. Any suggestions on how to do this if the following is false, would be great too, as I just got the MyDAQ a few days ago. I think there must be a better way, but it's the best I could come up with so far.

  

  Hi Jonny,

  The General logic, that you use to create a digital pulse train is very good. This VI you wrote should work and create the pulse train based on timing of software (which is fine because you have not DIO clocked by the material on the myDAQ anyway). However, it is generally advised to start the DAQmx task just before your time loop and then disable the task after the while loop when you press stop.

  For reference, there are a few examples of good enough LV that I recommend you watch too much for this application. If you try just to create a digital pulse train, the example Gen dig Pulse Train - Continuous.vi is a good example that uses a counter to create a digital pulse of your desired frequency train. It is generally the preferred method to create a pulse train, if you have equipment available to do (the myDAQ there a meter). Otherwise, there are a few examples DIO who write continuously in a digital line / port.

  If you are unfamiliar, you can find the examples by clicking Help > examples find... into LV then navigate to hardware input and output > DAQmx > generating digital impulses or the digital generation.

  Also, here is some additional information on the myDAQ and its counters:

  myDAQ counters

  myDAQ manual

  Hope this helps.

  Chris G

• time extraction of the digital signal

  Hello

  If I have digital signals from optical barriers and to extract the time (for a body that passes these 2 obstacles) how can I retrieve this day there using Labview.

  THX

  I have chata,

  Thanks for the answer, and I hope that your well.

  Here's an example I've done for a client, eager to discover the time of a flat section of its waveform.

  In your case, you must make a detection of pic on both codes, then less locations and a few x with the number of the sample to get the time.

  Let me know what you think.

  Kind regards

  James.

  PS Sorry code is a bit hasty.

• How to generate a digital signal on a negative slope of the clock?

  Hello

  I need to get out a finished length of the Digital pulse which will begin on request to the negative of the clock slope import (or export).

  I try to get the clock, exported or imported, but in any case, I can trigger output signal on the negative slope.

  What is the trick?

  Thank you

  Pawel

  What camera you use to build your digital signal.  What is the source of the clock?  You can attach your vi?  Normally, there is a function of data acquisition for configure the trigger where you choose the source of the trigger and the trigger slope (rising or falling), should be declining to a negative slope.

  

• Acquire 2 digital signal of custom scale (Engg units)

  I am a newbie to the world of DIO.

  I write a VI to acquire 2 digital signals. one of a load cell and others for engine rpm (legumes). I need acquire these two signals and then convert them to engg units using the custom scale and write it in a txt file with timestamp.

  Please suggest the best ways to accomplish this task.

  Thank you

  DAQG

  Look at the examples on DAQmx in the finder of the example.

  You would not really acquire 2 digital signals.  You would acquire an analog signal of the load cell.  A digital acquisition or against, this is what would make you the acquisition of the motor.  Looking for analog and the counter measures in the finder of the example.  Some of the example should show you how to apply the custom scale.