How does a Spectrum Analyzer differ from a Vector Signal Analyzer?
Whether they are swept spectrum, VSA, or standard-specific demodulators, the architecture of most RF signal analysis solutions is similar: A superheterodyne receiver downconverts and filters the signal to an intermediate frequency (IF) where final filtering and analysis are performed. Though their architectures are similar, spectrum analyzers and VSAs usually perform different kinds of signal analysis using different signal processing schemes and, importantly, have quite different user interfaces. The trend today, however, is for spectrum and vector signal analysis to be combined in a single tool that can offer the familiar capabilities and user interface of a spectrum analyzer and still be instantly switchable to provide complete vector signal analysis and digital demodulation. The Agilent X-Series Signal Analyzers (PXA, MXA, EXA and CXA) are this type of tool. The X-Series takes maximum advantage of the architectural benefits of both an RF spectrum analyzer and a VSA. A high performa
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