R&S
®
CMW 500 System Overview
Measurements
Operating Manual 1202.3986.32 – 03 48
The I/Q offset in dB is the logarithmic ratio of the I/Q offset vector (i.e. the estimated
DC-offset of the measured signal) to the average offset-corrected signal vector:
In the equation above, | Offset - corrected signal vector |
RMS
denotes the magnitude of
the offset-corrected signal vector that is RMS-averaged over all samples.
The I/Q imbalance in dB is equal to the difference between the estimated I and Q
amplitudes of the measured signal, which are normalized and logarithmized as follows:
Analysis Mode
In some network applications (e.g. WCDMA), it is possible to select different algorithms
for the modulation analysis:
In the analysis "With Origin Offset", the modulation vectors R and Z for the EVM
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