VNAs have been the workhorse of microwave measurements for many years. They provide the ability to measure S parameters of active and passive devices and systems. When measuring active devices, these measurements are made on small signal devices where gain is linear. When measuring small signal amplifiers, the linear VectorStar VNA provides many built-in functions to thoroughly analyze these active devices. Applications such as built-in programmable power sweeps for gain compression analysis at multiple frequency points, IMD measurements, harmonic measurements, characterization down to 70 kHz to evaluate memory effects, etc., are all available in the VectorStar VNA. Table 1 provides a brief overview of the capabilities of the MS4640A family of VectorStar VNAs.
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