IQ Offset (6GR)
The traces in the CCn and Selected Display CC menus are identical and show the same CC0 information.
indicates the magnitude of carrier feedthrough (power at 0 Hz), in dBc deciBels referenced to the carrier: A technique for expressing a power measurement in logarithmic form using the carrier power as a reference.. When there is no carrier feedthrough, IQ Offset is zero (−infinity dB).
is calculated by RMS averaging the measured IQ offset for each symbol in the measurement interval, and is expressed relative to the average signal power.
An IQ offset can be caused when the center (DC) carrier, which is supposed to be filtered out, leaks into the signal. It can also be caused when the baseband signal has a DC offset that shows up as DC carrier power once the baseband signal is upconverted.
To remove a measured IQ offset from the results rather than report it, see Compensate IQ Offset.
See Also
