I would like to use the LimeSDR in low-IF mode. I configured the LimeSDR with default settings in the LimeSuiteGui. Then, I have enabled the CMIX in RXTSP and the FIR filters for lowpass filtering. No matter which up or downconversion frequency I choose a DC offset is remaining, while the real DC spike shifts correctly. I checked the setup in the FFT Viewer with a CW generator and there is definitely no error in terms of frequency offset.
Has anybody seen the same problem? Thank you for your help!