White Noise generator with wave form shaping

[malkoba]

Hi

Does any body know how to develop a white noise generator with a spectrum shaper (which boosts up low frequencies), using the Labview.

Thanks

Mal

[LV_Pro]

If you are using a LabVIEW package beyond the base package, there are vi's for both generating White noise and digital filters. Not knowing how much you want to boost the lower frequencies (sounds like "Pink noise") it is hard to determine the filter/shape you need. There are low pass, Bessel, etc. that would give varying roll offs of the higher frequencies (the same as boosting the lower). Remember that these digital filters are happiest with "powers of 2" samples sizes.


Putnam Monroe
Senior Engineer - North Shore Technology, Inc.

[Paul V]

As a complete beginner attempting to learn enough to complete a project initially started many years ago... is there a way to white noise and create a digital filter in the event one only has access to the base package with provided patch packages (LV6.0.2)? I think I have created a work around that averages all signals aquired over 16.7mSec.... (1 60Hz cycle), thus getting rid of the effects of induced 60Hz noise, but it seems a crude way to do it. Additionally, I'm still getting some interferance that corrupts the desired signal.
Any Thoughts?
Thanks,
Paul

[malkoba]

Hi

It is actually sort of pink noise in the range from 0 to 5000 Hz with higher boost in the 0 to 1000 Hz region (sort of A weighting response). Do you know of any examples that perform this. I am using Labview 7.1 (proffessional).

Thanks

Mal