Title :
Measuring harmonic distortion and noise floor of an A/D convertor using spectral averaging
Author_Institution :
Tektronix Inc., Beaverton, OR, USA
Abstract :
Spectral averaging techniques are used to measure the harmonic distortions and the noise floor of an A/D digitizing subsystem. The noise floor of an ideal B-bit A/D convertor is derived in closed form. It is shown that this noise floor is a function of the A/D resolution B, the record length N and the equivalent noise bandwidth Eβ of the window function used in the discrete Fourier transform (DFT) computation
Keywords :
analogue-digital conversion; electric distortion measurement; electric noise measurement; electronic equipment testing; fast Fourier transforms; signal processing; A/D convertor; B-bit A/D convertor; discrete Fourier transform; equivalent noise bandwidth; harmonic distortion measurement; noise floor; record length; resolution; spectral averaging; Bandwidth; Computational modeling; Converters; Distortion measurement; Dynamic range; Harmonic distortion; Noise measurement; Signal analysis; Signal to noise ratio; Spectral analysis;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1988. IMTC-88. Conference Record., 5th IEEE
Conference_Location :
San Diego, CA
DOI :
10.1109/IMTC.1988.10852
