RMS Error Vector Spectrum (LTE)

Menu Path (downlink): Trace > Data > Layer N > RMS Error Vector Spectrum

Menu Path (uplink): Trace > Data > Demod > RMS Error Vector Spectrum

RMS Error Vector Spectrum shows the Root Mean Square (RMS) average EVMError 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. for each subcarrier. The value displayed above each subcarrier index on the x-axis is the EVM RMS average for the subcarrier over all symbols in the Measurement Interval. Only currently selected channels (see Composite Include) are included in the average.

The value "ss" in the "xRMS: ss" or "xPeak: ss" annotation at the top of the trace is how many symbols were included in the current measurement.

Averaging

This trace supports averaging over multiple measurements. When Averaging is enabled, value "mm" in the "RMS: mm" or "Peak: mm" annotation at the top of the trace displays how many measurement sweeps have been included in the current average.

See Also

RMS Error Vector Time

RB Err Mag Spectrum

RB Error Mag Time

Available Trace Data