Noise on a single channel of a Task with multiple tasks

[UBAP]

Hi,
I am using a NI PCI 6221.
I am trying to measure four analog voltages by clubbing them into one task using DAQ assistant.
One of the channel is trying to measure the amplitude of some voltage pulses. I can see the pulses, but with noise. Amplitude of noise is about 20% the amplitude of the actual voltage pulses that I want to see.

Can I filter noise in that particular channel?

Thanks

[devchander]

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Can I filter noise in that particular channel?

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Rather than that, I would suggest you to first determine what is causing that noise and try rectifying on hardware level.

It may be due to inproper signal connection/ grounding etc.

If you scan this channel alone, do you still observe this noise??

I am asking this to determine if there is any cross talk occuring between neighbouring channels

[UBAP]

Thanks for the reply.
It is actually voltage picked up by a coil.
With a continusous AC waveform that is appearing (which I am not interested in), I am have occasional pulses/spikes. I am more interested in the pulses than the continuous AC wave form. Is there way that I just see the pulses and filter the AC waveform on that single channel?

Anyways,
I do not have any grounding issues.
There is no cross-talk.

Thanks

[devchander]

Of course you can index/assess that particular channel from the scan list and filter it as per your requirement

You have quite a bit of filtering options in LabVIEW.( you have digital FIR and IIR filters)

The best to start with, would be an express filter vi

[AnalogKid2DigitalMan]

You could also implement a high pass filter with resistors and capacitors to allow spikes to pass but block the AC signal.

What frequency is the AC waveform?