Solution
Aliasing occurs when the sampling rate does not satisfy the Nyquist criterion (fs ≥ 2 × highest input frequency). If a signal is sampled at a sampling rate smaller than twice the Nyquist frequency, false lower-frequency components appear in the sampled data. This phenomenon is referred to as aliasing.
The PXIe‑4302 supports sampling rates from 1 S/s to 5 kS/s. All filtering specifications can consider this range as a reference.
The usable input frequency range (alias-free bandwidth) depends on fs as follows:
Example calculations:
In other words, the filter passes all input signals with frequencies between 0 Hz and the passband's upper cutoff frequency, while attenuating or rejecting signals with frequencies above this cutoff.