Abstract
In this paper, a method is described that provides vector network analyzer (VNA) functionality without the introduction of a VNA to the test system. In many cases, the amount of testing that requires a VNA is very limited, and most of the testing requires other instruments. In some cases, the required measurements have been performed with a setup consisting of a signal generator, directional couplers and a power meter. This method usually results in extremely poor accuracy. We have to have a signal source that can provide the required modulated signals for testing, and we have to have a vector signal analyzer (VSA) that can perform spectral measurements as well as vector error measurements etc. By utilizing the capabilities of these instruments we can achieve the wanted VNA functionality, with good enough accuracy for several of our applications.
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