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Error vector magnitude (EVM) measurements
can provide a great deal of insight into the performance
of digitally modulated signals. With
proper use, EVM and related measurements
can pinpoint exactly the type of degradations
present in a signal and can even help identify
their sources. This note reviews the basics of
EVM measurements on the Agilent Technologies
89400 vector signal analyzers, and outlines a
general procedure that may be used to methodically
track down even the most obscure signal
problems. |
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EVM.pdf
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