AI acquire waveform. maximum readable data 
Author Message
 AI acquire waveform. maximum readable data

Are you using a lowpass-filter for
signalconditioning???
The low frequency components could come
from alaising effects..
(see the NI DAQ tutorial)


Fri, 16 Jan 2004 23:11:45 GMT  
 AI acquire waveform. maximum readable data
To expand on the previos response, Nyquist Thereom tells us we need to
sample at least twice as fast as the signal's frequency to get an
accurate sampling and reduce aliasing effects. Aliasing can also be
due to noise sources in the environment so using a low-pass filter is
still a good idea. Here is a Knowledge Base on aliasing and low-pass
filtering:
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/68f...


Fri, 16 Jan 2004 23:58:08 GMT  
 
 [ 2 post ] 

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