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11 Modulation Accuracy (Composite Rho)
Rho is one of the key modulation quality metrics, along with EVM. Rho is the ratio of the correlated
power in a multi coded channel to the total signal power. This measurement takes into account all
possible error mechanisms in the entire transmission chain including: baseband filtering, I/Q modulation
anomalies, filter amplitude and phase non-linearity, and power amplifier distortions.
This provides an overall indication of the performance level of the transmitter of the unit under test
(UUT).
Modulation Accuracy Remote Command SCPI Results
You must be in the cdma2000 to use these commands. Use INSTrument:SELect to set the mode.
:CONFigure:RHO
:FETCh:RHO[n]?
:READ:RHO[n]?
:MEASure:RHO[n]?
Key Path Meas