For the PSA Series and E4406A VSA Series 1xEV-DO measurement personality, why did the Modulation Accuracy (Composite Rho) measurement change names ...

In the cdma2000 standard, Rho is a common parameter name used to express modulation quality. However, 3GPP2 uses the term Waveform Quality in the 1xEV-DO conformance tests, and the 1xEV-DO measurement personality was updated to use the same terminology.