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fpga sampling rate

sorry for my english...

 

If I do the dacimation from the frequency 0.98 kHz (this is the min frequency NI 9232) and I want to decimate this frequency by 2,4,8, etc.

 

Should I use low pass filter before this decimation to prevent aliasing ??  You wrote a pre-filter is set up when the sample rate (0,98khz) is choosen.

 

(I think I should and set different filter parameters according to each decimation rate)

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yes, you are right, you should your own LP filter for that.

And than you will decimate your data.

 

Ion R.

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