The network analyzer, sometimes referred to as a Frequency Response Analyzer (FRA) is a common piece of equipment in most of our labs today. Analyzers are used for a variety of tasks including stability analysis, component characterization and of course frequency response measurements. They can vary in features but regardless of the analyzer being used, the analyzer oscillator signal must be injected into the circuit being tested in order for a measurement to be made.
As design consultants, specializing in worst-case analysis for analog circuit applications, we are routinely, called in to address design problems arising in RF and power electronics applications. Many of the problems we are asked to resolve can be readily avoided if the proper signal injectors are used. To cover the range of test measurements, man y different types of signal injectors are required, each providing a different test function.
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