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LabVIEW Signal Processing by Mahesh L. Chugani, Abhay R. Samant, Michael Cerna

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Appendix C. Frequently Asked Questions

Background

1.

Can the antialiasing filter be a digital filter?

In general, when going from a domain P to a domain Q, the filter should be in domain P to avoid the problem of aliasing in the domain Q. Thus, when sampling to convert an analog signal to a digital signal, the antialiasing filter should be an analog filter. However, when performing decimation to reduce the sampling rate, you are going from the digital domain (with a higher sampling rate) to the digital domain (with a lower sampling rate). In this case, the filtering before the decimation is performed in the digital domain by a digital filter.

Signal Generation

1.

Why are there Pattern VIs, when the Wave VIs will do all that the Pattern VIs can and more? ...

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