Antialiasing filtering problem, no hardware filter

I have an NI compactRIO 9205 analog input module, sampling at 250 KS/s for 32 channels. There is no hardware antialiasing filtering. I need to use the frequency component between 1 to 1000 Hz, but I'm afraid the signal has been contaminated by aliasing. Is there any way I can do antialiasing filtering in software and resample the data at 1 kHz?
Thanks.

Like Astroglen says. You should evaluate your acquired signal. Then ask your self what you have measured and why. Then doing data acquisition your signal will always have some unwanted contamination. Like 50 or 60 Hz from the mains as one example. But if you do a FFT you will able to determine if your signal to noise ratio is adequate or not. Also some digital filtering may help. But remember that the closer to the Nyquist frequency you get, your digital filter will be less efficient. If you feel it would be any help. Post a picture of your FFT.
Besides which, my opinion is that Express VIs Carthage must be destroyed deleted
(Sorry no Labview "brag list" so far)

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Quote
Product
Windows
Problem
Video hardware error
Date
01/01/2002 12:10 AM
Status
Not Reported
Description
A problem with your video hardware caused Windows to stop working correctly.
Problem signature
Problem Event Name:   LiveKernelEvent
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Files that help describe the problem
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BCP2:   9001C710
BCP3:   00000000
BCP4:   00000000
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Service Pack:   2_0
Product:   768_1
Quote
Product
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Status
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Locale ID:   4105
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Mini123101-01.dmp
sysdata.xml
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BCP1:   876BD008
BCP2:   9001C710
BCP3:   00000000
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Service Pack:   2_0
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System set-up:
k9agm2
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650 watt ocz stealth psu
xfx 8800gt pci-e
vista (32bit)

Quote from: Henry on 27-September-09, 04:29:05
When you have the BIOS setting back to factory default like that I think replacing CMOS battery is the 1st thing to do especially if the MB is several (3 or more) years old. The date of your BIOS (2002) indicates a pretty old battery if it hasn't been changed before.
Actually the date is that way because of the time reset in vista - the report is a windows generated report. The computer itself, and the motherboard, are about 4 years old. Still time to change the battery possibly.
I haven't had any problems within windows ever since the msi-live screen comes on and warns me the battery is low (which it does whenever my computer has been off for a while). I just fix the time in the bios, then save and resume and windows has been fine.
I'll change the battery tomorrow and give it a week or so.

Antialiasing filtering problem, no hardware filter

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