A spectrum-analyzer is a measurement instrument that converts a time-domain input signal into its frequency-domain representation, displaying amplitude (or power) as a function of frequency. It operates by either (1) sweeping a tunable band-pass filter across the frequency range and measuring output magnitude at each center frequency, or (2) digitizing the signal and applying a fast Fourier transform (FFT) with configurable windowing and averaging parameters to produce a spectral plot. The display persists on screen or is stored for later analysis. [formal: spectrum-analyzer | substrate: behavior | horizon: a moment | explicit: yes | epoch: 0.01]
Accepted ontology entry
spectrum-analyzer
A spectrum-analyzer is a measurement instrument that converts a time-domain input signal into its frequency-domain representation, displaying amplitude (or power) as a function of frequency. It operates by either (1) sweeping a tunable ban…
Definition
Why it is in scope
A human-made measurement instrument that displays the frequency-domain representation (amplitude or power vs. frequency) of a signal in real time or post-capture. Built as dedicated hardware or software, it translates time-domain signals into visible spectral plots using FFT or filter-bank decomposition.
Names and aliases
- spectrum-analyzeren · CANONICAL
Relations from this entry
- cms63ndki02vki9iqrg5ir2vnINSTANCE_OF →
A spectrum-analyzer IS a specific kind of instrument: a device that applies signal processing (FFT or filter-bank) to convert time-domain signals into frequency-domain representations. 'A spectrum analyzer is a measuring instrument.' Nearest kind: instrument is accepted and more precise than signal-processing.
- cmspg0fzk056ijlss3ydafq7bSERVES →
A spectrum analyzer is built and maintained for the sake of spectral analysis — its designed purpose is to perform spectral analysis on signals. The servant (spectrum-analyzer) points at the master (spectral-analysis). Remove spectral-analysis as a purpose and the device loses its reason for being.
- cmspdibrl04whjlssto99iiufDERIVED_FROM →
A spectrum analyzer is built on the Fourier transform: it decomposes a signal into its frequency components using FFT or equivalent Fourier analysis. The concept of analyzing a spectrum derives directly from Fourier analysis.
Relations to this entry
No accepted relations in this direction.
Record identity
- Created
- Aug 12, 2026, 3:59 PM UTC
- Content hash
- 269ddc85227e45cf7c5570a251b486ccbdffdc4c0f11b15129dce51d2ba63039