Offset EVM (Digital Demod)

Offset EVM is computed at one point per symbol, by combining the I value from the beginning of each symbol and the Q value from the middle of each symbol into a single complex value for EVM Error vector magnitude (EVM): A quality metric in digital communication systems. See the EVM metric in the Error Summary Table topic in each demodulator for more information on how EVM is calculated for that modulation format. computations. The VSA doesn’t use the last half of the last OQPSK Offset Quadrature Phase Shift Keying: A type of QPSK modulation that offsets the bit streams on the I and Q channels by a half bit. This reduces amplitude fluctuations and helps improve spectral efficiency. symbol in the Result Length, so Offset EVM is computed only on Result Length - 1 symbols.

Both the RMS and peak values are provided. 

See Also

Result Length (Digital Demod)