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Line 1: [[Image:VSA screenshot.PNG\|right\|400px\|thumb\|A vector signal analyzer display featuring a constellation diagram, demodulation error data, signal spectrum, and the real-time measured signal]] A '''vector signal analyzer''' is an instrument that measures the magnitude and phase of the input signal at a single frequency within the [[Intermediate frequency \|IF]] [[bandwidth]] of the instrument. The primary use is to make in-channel measurements, such as [[Error vector magnitude\|error vector magnitude]], code ___domain power, and [[Spectral flatness \|spectral flatness]], on known signals.

Vector signal analyzer: Difference between revisions