The TAPR Vector Network Analyzer is a low-cost Vector Network Analyzer (VNA) that operates from 200 kHz to 100 MHz, and connects to a personal computer using a USB 1.1 interface.
The VNA is one of the more useful pieces of test equipment for designers and experimenters. It can measure the forward and reverse gain and phase response of a circuit, and the input and output reflection properties (complex impedance). The VNA is used to measure and adjust filters, coaxial cables, amplifiers, antenna input impedance vs. frequency, just to name a few.
QEX July/August 2004 The July/August 2004 QEX article discusses the design of the measurement hardware, control processor software on the instrument itself, and the software on a personal computer that controls and displays the measurements.
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