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A Network Analyzer is an instrument used to analyze the properties of electrical networks, associated with the reflection and transmission of electrical signals. An analog spectrum analyzer uses either a variable bandpass filter whose mid-frequency is tuned through a range of frequencies to be measured. A digital spectrum analyzer computes the Fast Fourier transform (FFT), a mathematical process that transforms a waveform into the components of its frequency spectrum. Network/Spectrum Analyzers <10GHz are the most popular category. The two main categories of Network Analyzers < 10GHz are: * Scalar Network Analyzer (SNA) - Measures amplitude properties only * Vector Network Analyzer (VNA) - Measures both amplitude and phase properties There are analog and digital spectrum analyzers.
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