Spectrum analyzer
Article
A spectrum analyser is an instrument that measures the magnitude or power of an input signal across a range of frequencies. It displays frequency on one axis and signal level on the other.
Analysers may sweep a tuned filter across the frequency range, use a bank of filters, or calculate spectra digitally with a fast Fourier transform. Real-time instruments can capture rapidly changing or intermittent signals.
Measurements include carrier frequency, harmonics, modulation products, bandwidth, noise, distortion, interference, and spurious emissions. Resolution bandwidth and video bandwidth affect the detail and smoothness of the display.
Spectrum analysers are widely used in radio, telecommunications, audio, electronics, electromagnetic compatibility testing, radar, satellite systems, and scientific instrumentation.
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- Source / publisher: Wikipedia
- URL type: WWW
- Credits: Wikipedia
- URL: https://en.wikipedia.org/wiki/Spectrum_analyzer