Author Archives: richard wilson

IQ modulator design needs measurement accuracy, says Linear Tech

How to optimise digital modulation accuracy in an IQ modulator? Bruce Hemp and Peter Stroet from Linear Technology describe how a vector signal analyser helps optimise EVM performance of the LTC5598 direct quadrature modulator. EVM, or error vector magnitude, is essentially a scalar measurement of digital modulation accuracy, an important figure of merit for any ...

IQ modulator design needs measurement accuracy, says Linear Tech