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Spectrum Analyzer Interactive Simulator


Professional RF Spectrum & Waterfall Analyzer

SPECTRUM ANALYZER

Virtual Laboratory Instrumentation Suite

● SYSTEM LIVE
Noise Floor: -105 dBm
RBW: 100 kHz
TRC1 AVG: 16

Engineering Physics: Frequency Domain Analysis

The Fourier Transform

The Spectrum Analyzer converts time-domain signals into the frequency domain using the Fast Fourier Transform (FFT). This allows us to see individual energy components that are invisible on a standard oscilloscope.

X(f) = ∫ x(t) e-j2Ï€ft dt

Resolution Bandwidth (RBW)

RBW determines the analyzer's ability to resolve two closely spaced frequencies. A narrower RBW lowers the Displayed Average Noise Level (DANL), allowing you to see smaller signals at the cost of slower sweep speeds.

Rule: DANL improves by 10log10(RBWnew / RBWold).

The Waterfall Plot

Technically a Spectrogram, the waterfall display adds a third dimension: Time. Brightness/Color represents amplitude. This is critical for spotting "Transient Signals" (signals that turn on and off rapidly, like WiFi or Bluetooth).

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