Different offset between IQ signals

[kkao]

Hello,
I'm trying to run a simple loopback model on a bladeRF with a XB-200 transverter.
Loopback mode is set to "RF_LNA3".

My environment is below.
Windows 10
MATLAB/Simulink: R2016a
bladeRF-cli version: 1.4.0
libbladeRF version: 1.7.2
Firmware version: 2.0.0
FPGA version: 0.6.0

The graph displays transmitting sine waves (upper graph) and receiving sine waves (lower graph).
Two waves (yellow line and blue line) in each graph show I signals and Q signals.
Received IQ signals seem to have each offset at a different level.
That wasn't improved even if I executed "cal lms" "cal dc tx" "cal dc rx".

How should I improve this offset?
Thank you.

[kkao]

I really thank you for the information. I ran the cal command with some options and understood that gains and phases of IQ signals can be corrected finely, and each DC offset of IQ signals can be set separately. MATLAB functions will be also useful.