sdr.rms_voltage(x: ArrayLike) → float Measures the root-mean-square (RMS) voltage of a time-domain signal \(x[n]\). \[V_{\text{rms}} = \sqrt{\frac{1}{N} \sum_{n=0}^{N-1} \left| x[n] \right|^2}\] Parameters:¶ x: ArrayLike¶The time-domain signal \(x[n]\) to measure. Returns:¶ The RMS voltage of \(x[n]\) in units.