Mag Error and Phase Error (Custom IQ)

When Custom IQ is enabled, the Mag Error and Phase Error traces show the error between the I/Q measured and the I/Q reference signals. Mag Error displays the magnitude error and Phase Error displays the phase error.

$image\IQMagIQPhaseError_wmf.jpg$

If the Mag Error trace is selected, the VSA compares the magnitude of the I/Q measured signal with the magnitude of the I/Q reference signal. The VSA then displays the difference, in magnitude, between the two signals.

If normalization is OFF, the VSA displays the magnitude error in units of Volts (normalization factor = 1). If normalization is ON, the magnitude error is expressed as a percentage. See Normalize IQ Traces for information about the calculation of the normalization factor.

If the Phase Error trace is selected, the VSA compares the unwrapped phase, point-by-point, of the I/Q measured signal with the unwrapped phase of the I/Q reference signal. The VSA then displays the phase difference between the two signals.