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Digital Signal Processing (DSP) has revolutionized spectral analysis. Where the swept spectrum analyzer dominated the market in the past, the Fast Fourier Transform (FFT) based spectrum analyzer is now gaining acceptance as the method of choice. This is due in part to the prevalence of high speed, high dynamic range Analog-to-Digital Converters (ADC) and high speed signal processing devices such as...
The content of harmonic has a great influence on the electric power quality. It seriously influences power factor and aberrance extent of voltage. Therefore, it has become a necessary task to choose an economic and accurate measurement device. The device not only can detect harmonic, but also it is different from traditional measurement devices. Common electric energy meters can't distinguish fundamental...
This paper described a versatile block of signal conditioning options that process raw data samples from the A/D converter and deliver a filtered and resampled version of those data samples to a conventional FFT based spectrum analyzer. The conditioning performs a number of important processing functions. These include spectral translation to baseband, noise bandwidth reduction to signal bandwidth,...
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