Spectrum Analyzer


Overview:

Spectrum analyzer is a device used to examine the spectral composition of some electrical, acoustic, or optical waveform. Often, it measures the power spectrum. Spectrum analysis is concerned primarily with characterizing signal components (such as its spurious and harmonic components, modulation, noise, etc.) Spectrum analyzer is used to locate frequencies where microwave energy exists.

There are analogue and digital spectrum analyzers:

  • An analogue spectrum analyzer uses either a variable bandpass filter whose mid-frequency is automatically tuned (shifted, swept) through the range of frequencies of which the spectrum is to be measured or a superheterodyne receiver where the local oscillator is swept through a range of frequencies.
  • A digital spectrum analyzer uses the Fast Fourier Transform (FFT), a mathematical process that transforms a waveform into its frequency components in the spectrum. As a result, computer programs can compute such transforms, and makes audio processing easier. FFTs have applications in much wider fields.

Spectrum analyzer is used in the following areas of measurement analysis:

  • Distortion measurements
    • Distortion in amplifiers
    • Third order intercept measurement
    • Distortion in mixers
    • Distortion in oscillators
  • Modulation measurements
    • Amplitude modulation (AM) measurement
    • Frequency modulation (FM) measurement
  • Pulsed RF measurements
  • Noise measurements
    • Noise figure (NF) measurement
  • Electromagnetic interference (EMI) measurement

Important spectrum analyzer products:

Manufacturer Model Condition Description Specs
Keysight Technologies Inc. DSAZ254A New (GSA discount) Digital Signal Analyzer (1st gen Z-Series) 25 GHz 80 GSa/S 4 channel DSAZ254A
Keysight Technologies Inc. DSAZ204A New (GSA discount) Digital Signal Analyzer (1st gen Z-Series) 20 GHz 80 GSa/S 4 channel DSAZ204A
Keysight Technologies Inc. DSA91304A New (GSA discount) Digital Signal Analyzer - 13 GHz, 40 GSa/s, 4 Ch, 50M memory DSA91304A
Keysight Technologies Inc. DSA91204A New (GSA discount) Digital Signal Analyzer - 12 GHz, 40 GSa/s, 4 Ch, 50M memory DSA91204A
Keysight Technologies Inc. DSA90804A New (GSA discount) Digital Signal Analyzer - 8 GHz, 40 GSa/s, 4 Ch, 50M memory DSA90804A
Keysight Technologies Inc. DSA90604A New (GSA discount) Digital Signal Analyzer - 6 GHz, 20 GSa/s, 4 Ch, 50M memory DSA90604A
Keysight Technologies Inc. DSA90404A New (GSA discount) Digital Signal Analyzer - 4 GHz, 20 GSa/s, 4 Ch, 50M memory DSA90404A
Keysight Technologies Inc. DSA90254A New (GSA discount) Digital Signal Analyzer - 2.5 GHz, 20 GSa/s, 4 channel, 50M memory DSA90254A
M+P International MP-eRstd New (GSA discount) SO eReporter Standard MP-eRstd
M+P International MP-eRpro New (GSA discount) SO eReporter Pro MP-eRpro
M+P International MP-eMDOF New (GSA discount) Post Test - Modal Analysis, SDOF, MDOF & MMV; channel count unlimited MP-eMDOF
M+P International MP-VR24 New (GSA discount) 24 Channel VibRunner Hardware MP-VR24
M+P International MP-VR16-plus-1 New (GSA discount) 16 Channel VibRunner Hardware with 2 outs MP-VR16-plus-1
M+P International MP-VP8 New (GSA discount) 8 Channel Data Acquisition Hardware MP-VP8
M+P International MP-VP4 New (GSA discount) 4 Channel Data Acquisition Hardware MP-VP4
M+P International MP-DSAstd New (GSA discount) SO Analyzer General Data Acquisition MP-DSAstd
M+P International MP-DSApro New (GSA discount) SO Analyzer Advanced Data Acquisition MP-DSApro
M+P International MP-DSAmodal-plus New (GSA discount) Advanced Modal Data Acquisition MP-DSAmodal-plus
M+P International MP-DSAmodal New (GSA discount) Standard Modal Data Acquisition MP-DSAmodal
Rohde & Schwarz 1311.0006.40 New (GSA discount) Real-Time spectrum analyzer, 10 Hz to 40GHz, 40MHz bandwidth, signal and spectrum analyzer, 10 Hz to 40GHz 1311.0006.40
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Spectrum Analyzers by different manufacturers: