NASA NTRS · 19680000151
Improved S/N meter
Abstract
Signal-to-noise ratios /S/N/ meter containing a variable-frequency notch filter measures noise plus interference in the presence of carrier or modulation signals. A noise source and calibration signal source are included in the instrument for calibration purposes.
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Windett, C. B.. 1968-05-01. Improved S/N meter. https://ntrs.nasa.gov/citations/19680000151
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