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ROGA Instruments

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USB Measurement Card With and Without Anti-Aliasing Filter

This presentation explains the difference between measurement cards with and without anti-aliasing filters.
 
In this example, a 30 kHz signal is input.
 
The USB measurement card without an anti-aliasing filter incorrectly measures a 14 kHz signal at full energy.
 
Data acquisition without an anti-aliasing filter is unsuitable for dynamic sensor signals and leads to measurement errors.