analog anti-aliasing filter

[Midna19]

Hi Everyone

I am trying to find the highest peak in a signal. It seems like my data is not adequately sampled. I went to this page:

http://www.ni.com/white-paper/3770/en/

And they mentioned:

The front end of the data acquisition system should contain an analog anti-aliasing filter that removes or strongly attenuates components above Nyquist sampling rate, or half the sampling rate.

Does anyone know how to do this or give an example of an analog anti-aliasing filter in LV?

I have version 2010 SP1

Thank you!

xxxMidna

[hicksc]

Hi Midna

The comment in the white-paper you linked refers to anti aliasing which occurs before the A/D conversion happening on the DAQ device.

There's some more detailed information on this topin in the LabVIEW 2012 help page entitled 'Anti-Aliasing Filters' 

Any aliasing occuring before the ADC would likely be external to the DAQ device and not written in software.

Have you tried increasing the sampling frequency to that higher frequencies can be measured?

Kind regards

[Midna19]

Hi Chris

The max sampling rate from my oscilloscope is 2GS/s. I don't know if that should be fast enough to

get all the peaks in a 20 second signal or is my code just wrong?

Is there a way to increase the sampling rate even if I am at the max of the scope?

xxxMidna