High sensitivity noise measurement with a correlation spectrum analyzer

High sensitivity noise measurement with a correlation spectrum analyzer

A spectrum analyzer with enhanced sensitivity has been built and used in noise measurements. It is based on the processing of the input signal by two independent channels in parallel and takes advantage of the incoherent property of the noise in each of the two input stages. The instrument has demon...

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Veröffentlicht in:IEEE transactions on instrumentation and measurement 2000-08, Vol.49 (4), p.820-822
Hauptverfasser: Sampietro, N., Accomando, G., Fasoli, L.G., Ferrari, G., Gatti, E.C.
Format: Artikel
Sprache:eng
Schlagworte:
Channels
Correlation analysis
Frequency
Instrumentation
Instruments
Local oscillators
Low pass filters
Low-noise amplifiers
Noise
Noise level
Noise levels
Noise measurement
Signal processing
Spectral analysis
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Beschreibung
Zusammenfassung:A spectrum analyzer with enhanced sensitivity has been built and used in noise measurements. It is based on the processing of the input signal by two independent channels in parallel and takes advantage of the incoherent property of the noise in each of the two input stages. The instrument has demonstrated an improvement in sensitivity of at least 50 dB with respect to a traditional system, and therefore can measure low input signals down to the hundred pV//spl radic/Hz range.
ISSN:0018-9456
1557-9662
DOI:10.1109/19.863931