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A network analyzer is an instrument used to analyze the properties of electrical networks, especially those properties associated with reflection and transmission of electrical signals known as s-parameters. Network analyzers are used mostly at high frequencies; a typical unit can make measurements from a few hundred kilohertz up to several gigahertz. The two main categories of Network Analyzers are VNAs are the most common type of Network Analyzer. References to a 'network analyzer' most often mean a VNA since an SNA is functionally identical to a spectrum analyzer in combination with a tracking generator. A new category of Network Analyzers has also been developed for the measurement of non-linear microwave signals:
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