DFT Explorer

Signal

Signal freq f₁ (Hz) 50 f₂ (Hz) — for dual/multi 55

DFT Parameters

N (DFT length) 64 f_s (sampling freq) 500

Computed Metrics

Freq Resolution Δf—

Observation Time T—

Max Freq (fs/2)—

Freq Bins—

Key Relations
Δf = f_s / N = 1 / T
f_max = f_s / 2

To resolve two close frequencies:
Need Δf < |f₁ - f₂|
→ Increase N (more samples) or decrease f_s (longer observation)

Spectral leakage: occurs when signal frequency doesn't fall exactly on a DFT bin.