EVM (DVB-S2/S2X)
(Error Vector Magnitude) is the Root Mean Square (RMS) of the error vectors computed and expressed as a percentage of theThe error vector magnitude is the length of the vector—at the detected symbol location—which connects the I/Q reference-signal vector to the I/Q measured-signal vector. The following graphic shows the calculation of the
metric as well as a diagram showing how a single error vector is calculated.
Points/Symbol does not affect the value. The table also shows the location of the symbol that has the largest EVM.
is calculated from the symbol points (the instant in time when symbols are detected). The computation does not include points between symbols. ThereforeSee Also